TBJEE 2021 Question Paper - Physics, Chemistry

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2021
Question Paper Series

P

PHYSICS AND CHEMISTRY PC

Time : 1·5 Hours Maximum Marks : 240

Total Marks : 240 (4 × 60)

Answer all questions

This Question Paper consists of 28 pages. Each Multiple Choice Question (MCQ)
is provided with four options (A), (B), (C) and (D). Identify the correct option and
darken/fill the corresponding circle (A)/(B)/(C)/(D) with Blue/Black Ballpoint Pen
on the OMR Answer Sheet.

For each question, 4 marks will be awarded for correct answer and for each
wrong answer 1 mark will be deducted.

Τ šøìÅ¥¹ l¡üv¡¹ ƒà*

&Òü šøÅ¥šy[i¡ìt¡ 28 [i¡ ³å[‰t¡ šõË¡à "àìá¡ú šø[t¡[i¡ MCQ-&¹ Îàì= W¡à¹[i¡ δ±à¤¸ l¡üv¡¹ (A), (B), (C) &¤} (D)
ëƒ*Úà "àìá¡ú Î[k¡A¡ l¡üv¡¹[i¡ [>¤¢àW¡> A¡¹ &¤} OMR Answer Sheet-&¹ [>‹¢à[¹t¡ \àÚKàÚ l¡üv¡¹[i¡
(A)/(B)/(C)/(D) >㺠¤à A¡àìºà Ballpoint Pen [ƒìÚ ®¡[t¢¡ A¡¹¡ú

šøìt¡¸A¡ šøìÅ¥¹ Î[k¡A¡ l¡üv¡ì¹¹ \>¸ 4 >´¬¹ ëƒ*Úà Òì¤
&¤} šøìt¡¸A¡ ®å¡º l¡üv¡ì¹¹ \>¸ 1 >´¬¹ A¡ài¡à ™à줡ú

™t¡Û¡o š™¢”z >à ¤ºà Òì¤, t¡t¡Û¡o š™¢”z ë³àÒ¹ Jåºì¤ >à¡

PHYSICS
a − t2
1. In the expression P = , P is pressure, t is time and x is the distance. The dimension of
bx
a
will be
b
(A) LT 2 (B) MT –2
(C) ML2T –4 (D) M 2LT –2
a − t2 a
1ú P= &Òü γãA¡¹ìo P Òº W¡àš, t Òº Î³Ú &¤} x ™[ƒ ƒè¹â« ÒÚ t¡ì¤ b &¹ ³àyà Î}ìA¡t¡ Òì¤
bx
(A) LT 2 (B) MT –2
(C) ML2T –4 (D) M 2LT –2
h
2. An object is released from a height of h and after rebound it attains a height of . Which
2
of the following velocity (V ) vs. height (H ) graphs describes this journey correctly? (velocity
in upward direction is positive)

V V
H H
h h h h
2 2
(A) (B)

V V

H
H h h
(C) h/2 h (D) 2

2ú &A¡[i¡ ¤ÑñìA¡ h l¡üZW¡t¡à ë=ìA¡ ³à[i¡ìt¡ ëó¡ºà Òìº ³à[i¡ìt¡ Î}Qàìt¡¹ š¹ t¡à h l¡üZW¡t¡à š™¢”z *ìk¡¡ú [>ìW¡¹ ëA¡à>
2
K[t¡ì¤K (V ) ¤>à³ l¡üZW¡t¡à (H ) ëºJ[W¡y &Òü š[¹yû¡³à Î[k¡A¡®¡àì¤ šøA¡àÅ A¡ì¹? ($‹Œ¢³åJã K[t¡ì¤K ‹>àâ«A¡)
V V
H H
h h h h
2 2
(A) (B)

V V

H
H h h
(C) h/2 h (D) 2

PC—Series P 2

3. An object is thrown horizontally from the roof of a house at a velocity of 10 m/s. What is
the height of the house if the object hits the ground at an angle of 45º?

(A) 10 m (B) 7·2 m

(C) 5 m (D) 3·6 m

3ú &A¡[i¡ ¤àØl¡ã¹ áàƒ ë=ìA¡ &A¡[i¡ ¤ÑñìA¡ ">å®è¡[³A¡ [ƒìA¡ 10 m/s K[t¡ì¤ìK ëáàòØl¡à Òº¡ú ¤Ññ[i¡ 45º ëA¡àìo ®è¡-šõìË¡
"àQàt¡ A¡¹ìº ¤àØl¡ã¹ l¡üZW¡t¡à A¡t¡?
(A) 10 m (B) 7·2 m

(C) 5 m (D) 3·6 m

4. A spring of spring constant ‘k’ is divided in such a way that length of one section is thrice
that of the other. The new spring constant of the longer section will be

3k 4k
(A) (B)
4 3
9
(C) 4k (D) k
4

4ú ‘k’ [Ñß}-‹ø硤A¡ [¤[ÅÊ¡ &A¡[i [Ñß}ëA¡ &³>®¡àì¤ ƒåÒü iå¡A¡ì¹à A¡¹à Òº ™àìt¡ &A¡[i¡ "}ëŹ íƒQ¸¢ "š¹ "}ëŹ [t¡>P¡o
ÒÚ¡ú ƒãQ¢t¡¹ "}Å[i¡¹ >tå¡> [Ñß}-‹ø硤ìA¡¹ ³à> Ò줡
3k 4k
(A) (B)
4 3
9
(C) 4k (D) k
4

5. When a coin is kept at a distance of 4 cm from the centre of a circular table rotating at an
angular velocity of ω around its own axis, it starts slipping. If the angular velocity is 2 ω ,
what will be the minimum distance from the centre where the coin will start slipping ?

(A) 2 cm (B) 3 cm

(C) 1 cm (D) 8 cm

5ú [>\ "Û¡ ÎàìšìÛ¡ ω ëA¡ï[oA¡ ë¤ìK Qèo¢àÚ³à> &A¡[i¡ ¤õv¡àA¡à¹ ëi¡[¤ìº¹ ëA¡@ƒø ë=ìA¡ Τ¢[>´• 4 cm ƒèì¹ &A¡[i¡
‹àt¡¤ ³å‰à ¹àJìº *[i¡ [šáºàìt¡ Ç¡¹ç¡ A¡ì¹¡ú ëA¡ï[oA¡ ë¤K 2 ω A¡¹ìº ëA¡@ƒø ë=ìA¡ Τ¢[>´• A¡t¡ ƒè¹ìâ« ¹àJìº ‹àt¡¤
³å‰à[i¡ [šáºàìt¡ Ç¡¹ç¡ A¡¹ì¤?
(A) 2 cm (B) 3 cm

(C) 1 cm (D) 8 cm

PC—Series P 3 [ P.T.O.

6. A boat of length L and mass M is floating on a stationary lake water. A person of mass m
walks on the boat from one end to the other. Displacement incurred by the boat with
respect to bank of the lake is

M m
(A) L (B) L
M −m M −m
M m
(C) L (D) L
M +m M +m

6ú L îƒìQ¸¢¹ &¤} M ®¡ì¹¹ &A¡[i¡ ë>ïA¡à Òù샹 [Ñ‚¹ \ìº ®¡àÎìá¡ú m ®¡ì¹¹ &A¡ ¤¸[v¡û¡ *Òü ë>ïA¡à¹ &A¡ šøà”z ë=ìA¡ ">¸
šøàì”z ëÒòìi¡ ëKìº>¡ú Òù샹 t¡ãì¹¹ ÎàìšìÛ¡ ë>ïA¡à¹ ιì>¹ ³à> Òº
M m
(A) L (B) L
M −m M −m
M m
(C) L (D) L
M +m M +m

7. If a stone weighs ‘W’ at the equatorial surface of earth of radius ‘R’, then its weight at an
R
elevation from the surface will be
2
W W
(A) (B)
2 4
W 4W
(C) (D)
9 9
R
7ú ‘R’ ¤¸àÎà‹¢™åv¡û¡ šõ[=¤ã šõìË¡¹ [>¹Û¡ì¹JàÚ &A¡[i¡ šà=ì¹¹ *\> ‘W’ Ò캡, šõ[=¤ã šõìË¡¹ 2 l¡üZW¡t¡àÚ *[i¡¹ *\>
ƒàØl¡àì¤
W W
(A) (B)
2 4
W 4W
(C) (D)
9 9

8. The ratio of radii of two solid metal spheres is 1 : 2. They are released in a stationary
uniform viscous liquid. When both achieve terminal velocities, the ratio of their
momentum will be

(A) 1 : 8 (B) 1 : 16

(C) 1 : 32 (D) 1 : 64

8ú ƒå[i¡ [>ì¹i¡ ‹àt¡¤ ëKàºìA¡¹ ¤¸àÎàì‹¢¹ ">åšàt¡ 1 : 2, l¡ü®¡Ú ëKàºA¡ìA¡ &A¡[i¡ [Ñ‚¹ Îåȳ Îà@ƒø t¡¹ìº ëáìØl¡ ëƒ*Úà Òº¡ú
l¡ü®¡ìÚ [>\ [>\ šøà[”zA¡ K[t¡ì¤ìK ëšïòáàìº *샹 ®¡¹ì¤ìK¹ ">åšàt¡ Òì¤
(A) 1 : 8 (B) 1 : 16

(C) 1 : 32 (D) 1 : 64

PC—Series P 4

9. When a metal wire of length ‘l’ is subjected to tensions T1 and T2 respectively its length
changes to l1 and l2, then the relation of ‘l’ with l1 and l2 is correctly given by

1
(A) l = l1 l2 (B) l= (l1 + l2 )
2

l T +l T l T −l T
(C) l = 1 2 2 1 (D) l= 1 2 2 1
T1 + T2 T2 − T1

9ú ‘l’ íƒìQ¸¢¹ &A¡[i¡ ‹àt¡¤ t¡àì¹¹ l¡üš¹ š™¢àÚyû¡ì³ T1 &¤} T2 i¡à> šøìÚàK A¡¹ìº *[i¡¹ íƒQ¸¢ ƒàØl¡àÚ ™=àyû¡ì³ l1 &¤}
l2¡¡ú ‘l’ &¹ Îàì= l1 &¤} l2 &¹ Î[k¡A¡ δšA¢¡ Òì¤

1
(A) l = l1 l2 (B) l= (l1 + l2 )
2

l T +l T l T −l T
(C) l = 1 2 2 1 (D) l = 1 2 2 1
T1 + T2 T2 − T1

10. Certain volume V of an ideal gas is at temperature 27 ºC. Keeping its pressure unchanged,
at what temperature the volume of the gas will be doubled?

(A) 600 ºC (B) 327 ºC

(C) 108 ºC (D) 54 ºC

10ú V "àÚt¡> [¤[ÅÊ¡ &A¡[i¡ "àƒÅ¢ K¸àìι t¡àš³àyà 27 ºC ú W¡àš "š[¹¤[t¢¡t¡ ë¹ìJ ëA¡à>ô t¡àš³àyàÚ *[i¡¹ "àÚt¡>
[‡P¡o Òì¤?
(A) 600 ºC (B) 327 ºC

(C) 108 ºC (D) 54 ºC

11. The rms velocity of the molecules of a confined gas is C. Without changing the pressure
if the temperature of the gas is increased to three times its initial value, the rms velocity
of the gas molecules will become

C
(A) 3C (B)
3
(C) 3C (D) 9C

11ú &A¡[i¡ "इý¡ K¸àìι "oåP¡[º¹ KØl¡³à‹¸ ¤K¢ (rms) ë¤ìK¹ ³à> C , W¡àš "š[¹¤[t¢¡t¡ ë¹ìJ l¡üÌ¡t¡à šøà=[³A¡ l¡üÌ¡t¡à¹
[t¡>P¡o A¡¹ìº (rms) ë¤ìK¹ ³à> ƒàØl¡àì¤
C
(A) 3C (B)
3

(C) 3C (D) 9C

PC—Series P 5 [ P.T.O.

12. Rail line is being laid at 0 ºC with metal beams of length 10 m each and of material
having coefficient of linear expansion 11×10–6/ºC. How much gap has to be kept between
consecutive beams if maximum temperature at that place is 50 ºC?
(A) 2·75 mm (B) 5·5 mm
(C) 8·25 mm (D) 11 mm

12ú 0 ºC t¡àš³àyàÚ šø[t¡[i¡ 10 m º´¬à * 11×10–6/ºC íƒQ¸¢ šøÎà¹o P¡oà}A¡ [¤[ÅÊ¡ 빺ºàÒüì>¹ ‹àt¡¤šàt ¤Îàì>à
ÒìZá¡ú Ñ‚à>ãÚ l¡üZW¡t¡³ t¡àš³àyà 50 ºC Òìº š¹š¹ ƒå[i¡ šàìt¡¹ ³àìc¡ A¡t¡ óò¡àA¡ ¹àJìt¡ Òì¤?¡
(A) 2·75 mm (B) 5·5 mm
(C) 8·25 mm (D) 11 mm

13. Two metal bars A and B having same length and cross-section are joined in series as
shown. If the ratio of their thermal conductivities k1 : k2 = 2 : 3 and the end temperatures
are respectively 100 ºC and 0ºC, then temperature at the junction (θ) is

A B
k1 k2
100 ºC 0 ºC

(A) 60 ºC (B) 50 ºC
(C) 40 ºC (D) 30 ºC

13ú [W¡yà>åÎàì¹ Î³à> íƒQ¸¢ * šøÑ‚ìZრ[¤[ÅÊ¡ ƒå[i¡ ‹àt¡¤ƒ“¡ A &¤} B ëÅøoã γ¤àìÚ ™åv¡û¡ A¡¹à Òº¡ú *샹 t¡àšš[¹¤àÒãt¡à¹
">åšàt¡ k1 : k2 = 2 : 3 &¤} šøà”zãÚ t¡àš³àyà ™=àyû¡ì³ 100 ºC &¤} 0ºC Òìº ë\àìØl¡¹ t¡àš³àyà (θ)&¹ ³à>
Òì¤

A B
k1 k2
100 ºC 0 ºC

(A) 60 ºC (B) 50 ºC
(C) 40 ºC (D) 30 ºC

14. A tuning fork produces 5 beats each when in proximity to a sonometer wires of two different
lengths 40 cm and 44 cm. Frequency of the tuning fork is
(A) 90 Hz (B) 105 Hz
(C) 130 Hz (D) 145 Hz

14ú &A¡[i¡ Îå¹ÅºàA¡à &A¡[i¡ Îì>à[³i¡àì¹¹ 40 cm &¤} 44 cm t¡àì¹¹ Îàì= 5[i¡ A¡ì¹ Ѭ¹A¡ì´š¹ Îõ[Ê¡ A¡ì¹¡ú Îå¹ÅºàA¡à¹
A¡´šàS¡ Òº
(A) 90 Hz (B) 105 Hz

(C) 130 Hz (D) 145 Hz
PC—Series P 6

( )
15. The equation of a running wave is y = 7 sin 7πt − 0—04x + π , where y and x are in meter
3
and t is in seconds. The velocity of this wave is

(A) 175 π m/s (B) 49 π m/s

(C) 49 π m/s (D) 1—75 π m/s

15ú &A¡[i¡ W¡ºt¡¹ìU¹ γãA¡¹o y = 7 sin ( 7πt − 0—04x + π 3) , ë™Jàì> y &¤} x [³i¡àì¹ &¤} t ëÎìA¡ì“¡ šøA¡à[Åt¡¡ú
t¡¹ìU¹ K[t¡ì¤K Òº
(A) 175 π m/s (B) 49 π m/s

(C) 49 π m/s (D) 1—75 π m/s

16. Infinite number of point charges of same magnitude are kept along X-axis at x = 1 cm,
x = 2 cm, x = 4 cm, x = 8 cm, ..... and so on. If the magnitude of charge is 5 nC and
consecutive charges are of opposite sign, the magnitude of electric field at x = 0 is

(A) 6 × 10 4 N/C (B) 12 × 104 N/C

(C) 24 × 104 N/C (D) 36 × 104 N/C

16ú "Îã³ Î}J¸A¡ "[®¡Ä ³àì>¹ [¤@ƒå"à‹à>샹 X-"Û¡ ¤¹à¤¹ x = 1 cm, x = 2 cm, x = 4 cm, x = 8 cm, .....
&Òü®¡àì¤ ¹àJà Òº¡ú [¤@ƒå"à‹àì>¹ ³à> 5 nC &¤} š¹š¹ ƒå[i¡ "à‹à> [¤š¹ãt¡‹³¢ã Òìº, x = 0 [¤@ƒåìt¡ t¡[Øl¡;ìÛ¡ìy¹
šøà¤ìº¸¹ ³à> Òº
(A) 6 × 10 4 N/C (B) 12 × 104 N/C

(C) 24 × 104 N/C (D) 36 × 104 N/C

17. 1000 identical spherical mercury droplets are charged to achieve 1 V electric potential
each. If all the droplets are fused to form a single mercury sphere, its resultant electric
potential will be

(A) 1 V (B) 10 V

(C) 100 V (D) 1000 V

17ú 1000 [i¡ Îåȳ Û塉 šà¹ƒìKàºìA¡¹ šøìt¡¸A¡ìA¡ 1 V t¡[Øl¡;[¤®¡ì¤ "à[Òt¡ A¡¹à Òº¡ú &³t¡à¤Ñ‚àÚ ëKàºA¡P¡[ºìA¡
[³[ºìÚ &A¡[i¡ ³ày šà¹ƒìKàºìA¡ š[¹ot¡ A¡¹ìº ëÎ[i¡¹ [¤®¡ì¤¹ ³à> Òì¤
(A) 1 V (B) 10 V

(C) 100 V (D) 1000 V

PC—Series P 7 [ P.T.O.

18.
A

B

The equivalent capacitance CAB between A and B for the combination drawn here is
(A) 4 µF (B) 2 µF
(C) 5 µ F (D) 3 µF

18ú A

B

šøƒv¡ γ¤àÚ¤t¢¡>ã[i¡ìt¡ A &¤} B &¹ ³ì‹¸ t塺¸ ‹à¹A¡â« CAB &¹ ³à>
(A) 4 µF (B) 2 µF
(C) 5 µ F (D) 3 µF

19.

The nearest value of equivalent resistance of the combination of resistances given above is
(A) 4—5 Ω (B) 5—5 Ω
(C) 6—5 Ω (D) 7—5 Ω

19ú

šøƒv¡ "Îã³ ¤t¢¡>ã[i¡¹ t塺¸ ë¹à싹 [>A¡i¡t¡³ ³à>
(A) 4—5 Ω (B) 5—5 Ω

(C) 6—5 Ω (D) 7—5 Ω

PC—Series P 8

20. P Q

25 50 60 75
0 A B 100

When two equal unknown resistances Y, each are inserted in the gaps P and Q of the
meter bridge as shown, the null appears at the middle A. But if a 10 Ω resistance is
connected parallel to Y at Q, the null shifts 10 cm to the right at B as shown. The value of
Y is

(A) 20 Ω (B) 15 Ω

(C) 10 Ω (D) 5Ω

20ú P Q

25 50 60 75
0 A B 100

[W¡yà>åÎàì¹ ™J> ƒå[i¡ γ³àì>¹ "\à>à ë¹à‹ Y , ™=àyû¡ì³ [³i¡à¹¤øãì\¹ P &¤} Q ó¡òàìA¡ ºàKàì>à ÒÚ ¤öãì\¹ ‘>ຒ
[k¡A¡ ³àc¡Jàì> A [¤@ƒåìt¡ šà*Úà ™àÚ¡ú [A¡”ñ ™J> &A¡[i¡ 10 Ω ë¹à‹ Q ó¡òàìA¡ ºàKàì>à Y ë¹à싹 γà”z¹àº γ¤àìÚ
ºàKàì>à ÒÚ ‘>ຒ [¤@ƒå[i¡ 10 cm l¡à>[ƒìA¡ Îì¹ B [¤@ƒåìt¡ šà*Úà ™àÚ¡ú Y &¹ ³à> Òº
(A) 20 Ω (B) 15 Ω

(C) 10 Ω (D) 5Ω

21. A 10 Ω galvanometer shows full deflection for a current of 1 mA. How much resistance
has to be connected in series to convert the galvanometer to a voltmeter which can
measure a maximum voltage of 2·5 V ?

(A) 24—9 Ω (B) 249 Ω

(C) 2490 Ω (D) 24990 Ω

21ú 10 Ω ë¹à싹 &A¡[i¡ K¸àº®¡¸àì>à[³i¡àì¹ 1 mA šø¤àÒ ëKìº t¡à šèo¢ [¤ìÛ¡š ëƒJàÚ¡ú K¸àº®¡¸àì>à[³i¡à¹[i¡ìA¡ 2·5 V
š™¢”z ³àšà¹ l¡üš™åv¡û¡ 뮡àÂi¡[³i¡àì¹ ¹ê¡šà”z[¹t¡ A¡¹ìt¡ ëÅøoã γ¤àìÚ A¡t¡ ë¹à‹ ™åv¡û¡ A¡¹ìt¡ Òì¤?
(A) 24—9 Ω (B) 249 Ω

(C) 2490 Ω (D) 24990 Ω

PC—Series P 9 [ P.T.O.

22. The value of magnetic susceptibility χ of a paramagnetic sample can be represented by
(∆ being a small quantity)

(A) −∆ < χ < 0 (B) 0<χ<∆

(C) 1 < χ < 1 + ∆ (D) 1− ∆ < χ < 1

22ú &A¡[i¡ š¹àWå¡´¬A¡ãÚ šƒàì=¢¹ ëW¡ï´¬A¡ šø¤ot¡à χ &¹ ³à> šøA¡àÅ A¡¹à ë™ìt¡ šàì¹ (ë™Jàì> ∆ Òº &A¡[i¡ Û塉 Î}J¸à)

(A) −∆ < χ < 0 (B) 0<χ<∆

(C) 1 < χ < 1 + ∆ (D) 1− ∆ < χ < 1

23. An electron is moving in a circular trajectory under the influence of a transverse magnetic
field 3·57×10–2 T. If value of e/m is 1·76×1011 C/kg, frequency of revolution of the electron
is close to

(A) 1 GHz (B) 100 MHz

(C) 62·8 MHz (D) 6·28 MHz

23ú 3·57×10–2 T ">åšøÑ‚ ëW¡ï´¬A¡ìÛ¡ìy¹ šø®¡àì¤ &A¡[i¡ ÒüìºA¡i¡ö> ¤õv¡àA¡à¹ K[t¡š= š[¹yû¡³à A¡¹ìá¡ú ™[ƒ e/m &¹ ³à>
1·76×1011 C/kg ÒÚ, t¡ì¤ ÒüìºA¡i¡ö>[i¡¹ W¡yû¡K[t¡¹ A¡´šà}ìA¡¹ [>A¡i¡t¡³ ³à> Òì¤

(A) 1 GHz (B) 100 MHz

(C) 62·8 MHz (D) 6·28 MHz

24. If the instantaneous current in a coil of self-inductance 2 mH is given by I = t 2e–t, then
how long it will take to make the induced emf zero?

(A) 1 s (B) 2s

(C) 3 s (D) 4s

24ú 2 mH Ѭàì¤ÅàìS¡¹ &A¡[i¡ Aå¡r¡ºã¹ t¡à;Û¡[oA¡ šø¤àÒ³ày๠³à> I = t 2e–t Òìº, A¡t¡Û¡o š¹ "àì¤[Åt¡ t¡[Øl¡;W¡àºA¡
¤º Åè>¸ Òì¤?

(A) 1 s (B) 2s

(C) 3 s (D) 4s

PC—Series P 10

25. A ray of light passes through a prism of refractive index2 and angle of prism 60º. For
minimum deviation the angle of incidence of the incoming ray must be

(A) 30º (B) 45º

(C) 60º (D) 75º

25ú &A¡[i¡ [šø\ì³¹ šø[t¡Î¹o ëA¡ào 60º &¤} šø[t¡Î¹àS¡ 2 ¡¡ú &A¡[i¡ ¹[Ƶ¹ [šø\ì³¹ [®¡t¡¹ [ƒìÚ >è¸>t¡³ W塸[t¡ÎÒ
[>K¢³ì>¹ \>¸ t¡à¹ "àšàt¡> ëA¡àìo¹ ³à> Òì¤

(A) 30º (B) 45º

(C) 60º (D) 75º

26. The radius of curvature of a planoconvex lens is 25 cm. If refractive index of glass used is
1·5, the power of the lens in diopter unit is

(A) 2 (B) 3

(C) 4 (D) 8

26ú 1·5 šø[t¡Î¹àìS¡¹ Aò¡àW¡ ‡à¹à [>[³¢t¡ &A¡[i¡ γìt¡àºv¡º ëºìX¹ ¤yû¡t¡ìº¹ ¤¸àÎà‹¢ 25 cm Òìº l¡àÚši¡à¹ &A¡ìA¡
ëºX[i¡¹ Û¡³t¡à¹ ³à> Òº

(A) 2 (B) 3

(C) 4 (D) 8

27. In a Young's experiment a monochromatic light of wavelength 600 nm is used. If slit
separation is 6 mm, then fringe width on a perpendicular screen kept at a distance
80 cm will be

(A) 0·04 mm (B) 0·08 mm

(C) 0·12 mm (D) 0·2 mm

27ú &A¡[i¡ ÒüÚ} š¹ãÛ¡àÚ ¤¸¤Òê¡t¡ &A¡¤o¢ã "àìºà¹ t¡¹UîƒQ¸¢ 600 nm, ™[ƒ l¡ü;·ìÚ¹ ¤¸¤‹à> 6 mm &¤} º´¬®¡àì¤
¹[Û¡t¡ šƒ¢àƒè¹â« 80 cm ÒÚ, t¡ì¤ c¡àº¹š[i¡¹ ë¤ì‹¹ ³à> Òì¤

(A) 0·04 mm (B) 0·08 mm

(C) 0·12 mm (D) 0·2 mm

PC—Series P 11 [ P.T.O.

28. A proton and an α particle are accelerated by same 100 V potential difference. If the de
Broglie wavelength associated with proton is λ, then the de Broglie wavelength
corresponding to the α particle will be

λ λ
(A) (B)
2 2

λ
(C) (D) 2 2λ
2 2

28ú &A¡[i¡ ëšøài¡> * &A¡[i¡ α A¡[oA¡à l¡ü®¡ÚìA¡Òü 100 V [¤®¡¤šøì®¡ìƒ K[t¡Å㺠A¡¹à Òº¡ú ëšøài¡>[i¡¹ ƒ¸-¤øKºãÚ t¡¹UîƒQ¸¢
λ Òìº, α A¡[oA¡à¹ ƒ¸-¤øKºãÚ t¡¹UîƒQ¸¢ Òì¤

λ λ
(A) (B)
2 2

λ
(C) (D) 2 2λ
2 2

29. The mass of a radioactive sample is 10·38 kg. If half-life of the sample is 3·8 days, then
how much of the sample is retained after 19 days?

(A) 0·151 kg (B) 0·16 kg

(C) 0·32 kg (D) 1·51 kg

29ú &A¡[i¡ ët¡\[ÑI¡Ú >³å>๠®¡¹ 10·38 kg, ë³ïº[i¡¹ "‹¢àÚå 3·8 [ƒ> Òìº, 19 [ƒ> šì¹ >³å>๠A¡t¡i¡à "¤[ÅÊ¡
=àA¡ì¤?

(A) 0·151 kg (B) 0·16 kg

(C) 0·32 kg (D) 1·51 kg

30. The current amplification factor α of a transistor is 0·95. If change in the emitter current
is 10 mA, then corresponding change in the base current for that transistor will be
200
(A) 0·95 mA (B) mA
19

(C) 9·5 mA (D) 0·5 mA

30ú &A¡[i¡ i¡öà>[\С칹 šø¤àÒ [¤¤‹¢> P¡oà}A¡ α &¹ ³à> 0·95, [>–Îà¹A¡ šø¤àìÒ¹ š[¹¤t¢¡> 10 mA Òìº ®è¡[³šø¤àìÒ¹
š[¹¤t¢¡ì>¹ ³à> Òì¤
200
(A) 0·95 mA (B) mA
19

(C) 9·5 mA (D) 0·5 mA
PC—Series P 12

CHEMISTRY
31. 0·93 gm of an organic compound containing carbon, hydrogen and nitrogen as the
element upon complete combustion produces 2·64 gm CO2 and 0·63 gm H2O. Molecular
mass of the compound is 186. Determine its molecular formula.
(A) C5H7N (B) C6H7N
(C) C12H14N2 (D) C10H14N2

31ú A¡à¤¢>, ÒàÒüìl¡öàì\> * >àÒüìi¡öàì\> ë³ïºP¡[º ‡à¹à K[k¡t¡ &A¡[i¡ í\¤ ë™ïìK¹ 0·93 gm δšèo¢¹ê¡ìš ƒÒ> A¡¹ìº
2·64 gm CO2 &¤} 0·63 gm H2O l¡ü;šÄ ÒÚ¡ú ë™ïK[i¡¹ "ào[¤A¡ ®¡¹ 186 Òìº "ào[¤A¡ Î}ìA¡t¡ [>o¢Ú A¡¹¡ú

(A) C5H7N (B) C6H7N
(C) C12H14N2 (D) C10H14N2

32. Energy of which orbit of He-atom is equal to the energy of second orbit of H-atom?
(A) Fourth (B) Second
(C) First (D) Third

32ú ÒàÒüìl¡öàì\> š¹³àoå¹ [‡t¡ãÚ A¡ìÛ¡¹ Å[v¡û¡¹ ÎìU He-š¹³àoå¹ ëA¡à>ô A¡ìÛ¡¹ Å[v¡û¡ γà> Òì¤?
(A) W¡tå¡=¢ (B) [‡t¡ãÚ
(C) šø=³ (D) tõ¡t¡ãÚ

33. Between the elements aAa and bBc there exists the relation b – a = 5. Mention the period
and group of the element B.
(A) 2, 15 (B) 2, 14
(C) 2, 16 (D) 1, 14

33ú aAa * bBc ë³ïº ƒå[i¡¹ ³ì‹¸ b – a = 5 δšA¢¡[i¡ ¤t¢¡³à>¡ú ë³ïº[i¡¹ š™¢àÚ * ëÅøoã l¡üìÀJ A¡¹¡ú
(A) 2, 15 (B) 2, 14
(C) 2, 16 (D) 1, 14

34. Predict the correct bond order considering the following molecule and ions :
O2, O2–
2
, O2–, O2+
(A) O2+ > O2 > O2– > O2–
2
(B) O2+ > O2– > O2 > O2–
2
(C) O2 > O2– > O2+ > O2–
2
(D) O2– > O2+ > O2 > O2–
2

34ú [>´•[º[Jt¡ "oå * "àÚ>P¡[º ‹ì¹ Î[k¡A¡ ¤Þê¡>yû¡³ [>샢ŠA¡¹ –
O2, O2–
2
, O2–, O2+
(A) O2+ > O2 > O2– > O2–
2
(B) O2+ > O2– > O2 > O2–
2
(C) O2 > O2– > O2+ > O2– O2– > O2+ > O2 > O2–

2
(D) 2

PC—Series P 13 [ P.T.O.

35. 5 moles of nitrogen gas at 5 atm pressure shows 100 lit volume. The same gas assumes
200 lit volume upon absorbing 30·26 kJ heat against an external pressure of 2 atm.
Calculate the internal energy changes of this process. [Given 1 lit-atm = 101·32 J]
(A) 50·52 kJ (B) 60·66 kJ
(C) 0·14 kJ (D) 10 kJ

35ú 5 ë³àº >àÒüìi¡öàì\> K¸àÎ 5 atm W¡àìš 100 lit "àÚt¡> ëƒJàÚ¡ú 30·26 kJ t¡àšìÅàÈo A¡ì¹ K¸àÎ[i¡ 2 atm
¤[ÒÑ‚W¡àìš¹ [¤¹ç¡ì‡ý¡ šøÎà[¹t¡ ÒìÚ "àÚt¡> 200 lit Òº¡ú K¸àÎ[i¡¹ "à”z¹Å[v¡û¡¹ š[¹¤t¢¡> [>o¢Ú A¡¹¡ú
[1 lit-atm = 101·32 J]
(A) 50·52 kJ (B) 60·66 kJ
(C) 0·14 kJ (D) 10 kJ
36. In a first-order reaction, a reactant looses its 75% initial concentration on 32 minutes.
Determine the half-life of the reactant.
(A) 8 minutes (B) 16 minutes
(C) 4 minutes (D) 12 minutes

36ú &A¡[i¡ šø=³ yû¡ì³¹ [¤[yû¡ÚàÚ 32 [³[>ìi¡ &A¡[i¡ [¤[yû¡ÚìA¡¹ šøà=[³A¡ KàØn¡ì⫹ Åt¡A¡¹à 75 ®¡àK A¡ì³¡ú [¤[yû¡ÚA¡[i¡¹
"‹¢àÚå [>o¢Ú A¡¹¡ú
(A) 8 [³[>i¡ (B) 16 [³[>i¡

(C) 4 [³[>i¡ (D) 12 [³[>i¡
37. 3·7 gm of a gas at 25 ºC occupies some volume. At 17 ºC, 0·184 gm hydrogen gas occupies
same volume when pressures of both gases are same. What will be the molecular weight
of the gas?
(A) 41·98 (B) 20·67
(C) 20·94 (D) 41·34

37ú 3·7 Køà³ &A¡[i¡ K¸àÎ 25 ºC t¡àš³àyàÚ ë™ "àÚt¡> "[‹A¡à¹ A¡ì¹, 0·184 Køà³ ÒàÒüìl¡öàì\> K¸àÎ &A¡Òü W¡àìš &¤}
17 ºC t¡àš³àyàÚ ëÎÒü "àÚt¡>Òü "[‹A¡à¹ A¡ì¹¡ú K¸àÎ[i¡¹ "ào[¤A¡ ®¡¹ A¡t¡?
(A) 41·98 (B) 20·67
(C) 20·94 (D) 41·34

38. At constant volume 2·94 mole I2 is heated with 8·1 mole H2(g) at 444 ºC till the
equilibrium reached. If 5·64 mole HI is being generated following this reaction, then
calculate the value of equilibrium constant.
(A) 502 (B) 5·02
(C) 50·2 (D) 0·02

38ú 444 ºC t¡àš³àyàÚ &¤} [Ñ‚¹ "àÚt¡ì> 2·94 ë³àº I2 &¤} 8·1 ë³àº H2(g) l¡üv¡œ¡ A¡¹à Òº, ™t¡Û¡o >à
Î೸à¤Ñ‚àÚ ëš]ìáàÚ¡ú [¤[yû¡ÚàÚ ™[ƒ 5·64 ë³àº HI l¡ü;šÄ ÒÚ, t¡ì¤ Î೸‹ø硤ìA¡¹ ³à> [>o¢Ú A¡¹¡ú
(A) 502 (B) 5·02

(C) 50·2 (D) 0·02

PC—Series P 14

39. How much NaOH is to be dissolved in 1 lit water to obtain the solution having pH = 12?
(A) 0·4 gm (B) 40 gm
(C) 4 gm (D) 0·04 gm

39ú 1 [ºi¡à¹ \ìº A¡t¡ š[¹³ào NaOH ‰¤ã®è¡t¡ A¡¹ìº šøàœ¡ ‰¤ìo¹ pH = 12 Òì¤?
(A) 0·4 gm (B) 40 gm
(C) 4 gm (D) 0·04 gm
40. Observe the following redox reaction :
NaNO3 + aZn + bNaOH = NH3 + cNa2ZnO2 + H2O
Which one will be the correct value of a, b and c among the following?
(A) 2, 4, 2 (B) 3, 8, 3
(C) 1, 3, 1 (D) 4, 7, 4

40ú [>´•[º[Jt¡ \à¹o-[¤\à¹o [¤[yû¡Úà[i¡ ºÛ¡¸ A¡¹ –
NaNO3 + aZn + bNaOH = NH3 + cNa2ZnO2 + H2O

>ãìW¡¹ ëA¡à>[i¡ a, b &¤} c &¹ Î[k¡A¡ ³à>?
(A) 2, 4, 2 (B) 3, 8, 3
(C) 1, 3, 1 (D) 4, 7, 4
41. At 37 ºC, osmotic pressure of human blood is 7·65 atm. Tell how much glucose can be
used in 1 lit of water for intravenous injection so that osmotic pressure of this glucose
solution becomes equal to osmotic pressure of human blood.
(A) 22·2 gm (B) 54·2 gm
(C) 15 gm (D) 59·8 gm

41ú ³à>¤ ¹ìv¡û¡¹ "[®¡Ñ÷à¤o W¡àš (Osmotic Pressure) 37 ºC l¡üÌ¡t¡àÚ 7·65 atm ÒÚ¡ú šø[t¡ [ºi¡à¹ \ìº [A¡
š[¹³ào NÃåìA¡à\ ¤¸¤Ò๠A¡¹à ™àì¤ ™àìt¡ Òü@i¡öà쮡>àÎ ÒüìgA¡Åàì>¹ \>¸ ' NÃåìA¡à\ ‰¤ìo¹ "[®¡Ñ÷à¤o W¡àš ³à>¤
¹ìv¡û¡¹ "[®¡Ñ÷à¤o W¡àìš¹ γà> Òì¤, t¡à ¤º¡ú
(A) 22·2 gm (B) 54·2 gm
(C) 15 gm (D) 59·8 gm
42. 2 amp current is passed into a metal chloride solution for 75 min and as a result 3·0342 gm
metal deposited at the cathode. If specific heat of the metal is 0·096, then find the correct
atomic weight of the metal.
(A) 66·67 (B) 65·67
(C) 65·06 (D) 66·06

42ú &A¡[i¡ ‹àt¡¤ìAáà¹àÒül¡ º¤o ‰¤ìo¹ ³ì‹¸ 2 amp t¡[Øl¡;šø¤àÒ 75 min ‹ì¹ W¡àº>à A¡¹à Òìº 3·0342 gm ‹àtå¡
A¡¸àì=àìl¡ \³à ÒÚ¡ú ‹àtå¡[i¡¹ "àìš[Û¡A¡ t¡àš 0·096 Òìº, ‹àtå¡[i¡¹ Î[k¡A¡ šà¹³ào[¤A¡ ®¡¹ [>o¢Ú A¡¹¡ú
(A) 66·67 (B) 65·67

(C) 65·06 (D) 66·06

PC—Series P 15 [ P.T.O.

43. If H2O2 is added to acidic (dil. H2SO4) K2Cr2O7 solution followed by shaking of resulting
solution with diethyl ether, then the ether layer turns blue. This blue colour is due to the
formation of which of the following ?

(A) H2CrO4 (B) CrO5

(C) CrO3 (D) Cr2O3

43ú ™[ƒ H2O2 , "à[´ÃA¡ (ºQå H2SO4) K2Cr2O7 ‰¤ìo W¡àº>à A¡ì¹ l¡ü;šÄ ‰¤oìA¡ l¡àÒüÒü=àÒüºÒü=๠ÎÒì™àìK
cò¡àA¡àì>à ÒÚ t¡ì¤ Òü=๠Ñz¹ >㺤o¢ ‹à¹o A¡ì¹¡ú &Òü >㺠¹} Îõ[Ê¡¹ \>¸ [>ì´•àv¡û¡ ëA¡à>ô ë™ïK[i¡ [¤[yû¡Ú๠ó¡ìº l¡ü;šÄ
ÒÚ?

(A) H2CrO4 (B) CrO5

(C) CrO3 (D) Cr2O3

44. Find the basicity of the following acids :

Hypophosphorous acid, metaphosphoric acid, phosphorous acid, orthophosphoric acid,
pyrophosphoric acid.

(A) 1,1,2,3,3 (B) 1,2,2,3,4

(C) 1,1,2,3,4 (D) 1,2,3,3,2

44ú [>´•[º[Jt¡ "¸à[Îl¡P¡[º¹ Û¡à¹Køà[Òt¡à [>o¢Ú A¡¹ :

ÒàÒüìšàó¡Îó¡¹àÎ "¸à[Îl¡, ë³i¡àó¡Îó¡[¹A¡ "¸à[Îl¡, ó¡Îó¡¹àÎ "¸à[Îl¡, "ì=¢àó¡Îó¡[¹A¡ "¸à[Îl¡, šàÒüì¹àó¡Îó¡[¹A¡
"¸à[Îl¡¡ú

(A) 1,1,2,3,3 (B) 1,2,2,3,4

(C) 1,1,2,3,4 (D) 1,2,3,3,2

45. Dipolemoment value of the halogen acids follows which trend actually?

(A) HF > HCl > HBr > HI (B) HI > HBr > HCl > HF

(C) HI > HF > HCl > HBr (D) HI > HCl > HF > HBr

45ú Ò¸àìºàì\> "¸à[Îl¡P¡[º¹ [‡ì³¹ç¡ °à³ìA¡¹ ³àì>¹ yû¡³ šøAõ¡t¡šìÛ¡ ëA¡à>[i¡?

(A) HF > HCl > HBr > HI (B) HI > HBr > HCl > HF

(C) HI > HF > HCl > HBr (D) HI > HCl > HF > HBr

PC—Series P 16

46. To oxidise 1 mole sulfide ion in acid medium, tell the required molar amount of KMnO4.

(A) 1/5 (B) 2/5

(C) 3/5 (D) 4/5

46ú 1 mole Îàºó¡àÒül¡ "àÚ>ìA¡ "¸à[Îl¡ ³à‹¸ì³ \à[¹t¡ A¡¹ìt¡ A¡t¡ ë³àº KMnO4 šøìÚà\> t¡à ¤º¡ú
(A) 1/5 (B) 2/5

(C) 3/5 (D) 4/5

47. Which of the following ions are white colour or colourless in aqueous medium?

Ti3+, V3+, Cu+, Sc3+, Mn2+, Fe3+, Co2+

(A) Cu+, Co2+ (B) Fe3+, V3+

(C) Cu+, Sc3+ (D) Ti3+, Mn2+

47ú >ãìW¡¹ "àÚ>P¡[º¹ ³ì‹¸ ëA¡à>P¡[º \ºãÚ ‰¤ìo Îàƒà ¤ìo¢¹ ¤à ¤o¢Òã>?
Ti3+, V3+, Cu+, Sc3+, Mn2+, Fe3+, Co2+

(A) Cu+, Co2+

(B) Fe3+, V3+

(C) Cu+, Sc3+

(D) Ti3+, Mn2+

48. Which ion among the following is diamagnetic?

[NiCl4]2–, [Ni(CN)4]2–, [CuCl4]2–, [CoF6]3–

(A) [NiCl4]2–

(B) [Ni(CN)4]2–

(C) [CuCl4]2–

(D) [CoF6]3–

48ú [>´•[º[Jt¡ "àÚ>P¡[º¹ ³ì‹¸ ëA¡à>[i¡ [t¡¹ìÆW¡ï´¬A¡‹³¢ã?
[NiCl4]2–, [Ni(CN)4]2–, [CuCl4]2–, [CoF6]3–

(A) [NiCl4]2–

(B) [Ni(CN)4]2–

(C) [CuCl4]2–

(D) [CoF6]3–

PC—Series P 17 [ P.T.O.

49. According to IUPAC-nomenclature, which among the following is incorrect — specify it.

(A) CH3 CH CH CH2 CH3

CH3 (2-methyl-3-phenylpentane)

O

(B) CH3 C CH2 CH2 CH2 COOH
(5-oxohexanoic acid)

(C) Br CH2 CH = CH2
(1-Bromoprop-2-ene)

CH3 CH3

(D) CH3 CH2 C CH2 CH CH3

Br
(4-Bromo-2,4-dimethylhexane)

49ú IUPAC >à³A¡¹o šø=à ">å™àÚã >ãìW¡¹ ëA¡à>ô >à³A¡¹o[i¡ Î[k¡A¡ >Ú— l¡üÒà [W¡[Òû¡t¡ A¡¹¡ú

(A) CH3 CH CH CH2 CH3

CH3 ( 2-[³=àÒüº-3-[ó¡>àÒüºìšì@i¡> )

O

(B) CH3 C CH2 CH2 CH2 COOH

(5-"ìGà ëÒGàì>à[ÚA¡ "¸à[Îl¡)

(C) Br CH2 CH = CH2
(1-ë¤øàì³àìšøàš-2-Òü>)

CH3 CH3

(D) CH3 CH2 C CH2 CH CH3

Br
(4-ë¤øàì³à-2,4-l¡àÒü[³=àÒüºìÒìG>)

PC—Series P 18

50. Predict the product of the following reaction :

Cl (i) 2 eq Na(m)/
ether
+
(ii) H /H2O (mild)
Br

(A)
Br

Cl
(B)

(C)

(D)

50ú [>´•[º[Jt¡ [¤[yû¡Úà[i¡¹ l¡üŠ±èt¡ šƒà=¢ìA¡ Å>àv¡û¡ A¡¹¡–

Cl (i) 2-t塺¸àS¡ Na( ‹àtå¡ )/
Òü=à¹
+
(ii) H /H2O ( ³õƒå )
Br

(A)
Br

Cl
(B)

(C)

(D)

PC—Series P 19 [ P.T.O.

51. An organic compound of molecular formula C8H9Br on reaction with hot alcoholic AgNO3
solution produces white precipitate. Upon oxidation it produces C8H6O4 which on thermal
heating produces an anhydride. Identify the organic compound.

CH2Br CH2 CH3
Br
(A) (B)
CH3

CH2Br CH2Br
CH3
(C) (D)

CH3

51ú C8H9Br Î}ìA¡t¡[¤[ÅÊ¡ &A¡[i¡ í\¤ì™ïK l¡üv¡œ¡ "¸àºìA¡àÒºãÚ AgNO3 ‰¤ìo¹ ÎìU [¤[yû¡ÚàÚ Îàƒà "‹–ìÛ¡š
l¡ü;šÄ A¡ì¹¡ú l¡üÒàìA¡ \à[¹t¡ A¡¹ìº C8H6O4 ë™ïK l¡ü;šÄ ÒÚ, ™à t¡àìš¹ šø®¡àì¤ "¸à>ÒàÒül¡öàÒül¡ Kk¡> A¡ì¹¡ú í\¤
ë™ïK[i¡ìA¡ Å>àv¡û¡ A¡¹¡ú

CH2Br CH2 CH3
Br
(A) (B)
CH3

CH2Br CH2Br
CH3
(C) (D)

CH3

52. Products evolve by the reaction between CH2 —
— CH — OCH 3 and HBr at elevated
temperature will be

(A) CH3CHO and CH3Br

(B) BrCH2CHO and CH3 — OH

(C) BrCH2CH2 — OCH3 and CH3Br

(D) CH3 — CHBrOCH3 and CH3OH

— CH — OCH3 &¹ ÎìU HBr &¹ [¤[yû¡ÚàÚ l¡ü;šÄ šƒà=¢P¡[º Òì¤
52ú l¡üZW¡ t¡àš³àyàÚ CH2 —
(A) CH3CHO &¤} CH3Br

(B) BrCH2CHO &¤} CH3 — OH

(C) BrCH2CH2 — OCH3 &¤} CH3Br

(D) CH3 — CHBrOCH3 &¤} CH3OH

PC—Series P 20

53. Predict the Product(s) of the following reaction :

Cl3 CCHO + conc. NaOH +
(Chloral) (ii) H /H2O

O

(A) HO C CHO (B) CHCl3 + HCOOH
O
(C) Cl3 C C OH + Cl3CCH2OH (D) COOH — COOH + COOH — CH2OH
53ú [>´•[º[Jt¡ [¤[yû¡Úà[i¡¹ [¤[yû¡Úà\àt¡ šƒà=¢/šƒà=¢P¡[ºìA¡ [>샢ŠA¡¹¡ú
Cl3CCHO + KàØn¡ NaOH
(ëAáà¹àº)
O

(A) HO C CHO (B) CHCl3 + HCOOH
O
(C) Cl3 C C OH + Cl3CCH2OH (D) COOH — COOH + COOH — CH2OH

54. Identify the Product (M) observing the following reactions :
COOH
SOCl2 NH3 NaOH
[K] [L] [M]
Br2
Br
Product M will be :
COOH
SO2NH2
(A) (B)
NH2

NH2 CONH2

(C) (D)
Br OH
54ú [>´•[º[Jt¡ [¤[yû¡ÚàP¡[º ">å‹à¤> A¡ì¹ [¤[yû¡Úà\àt¡ šƒà=¢ (M) ëA¡ Å>àv¡û¡ A¡¹ :¡
COOH
SOCl2 NH3 NaOH
[K] [L] [M]
Br2
Br
[¤[yû¡Úà\àt¡ šƒà=¢ M Òì¤ :
COOH
SO2NH2
(A) (B)
NH2

NH2 CONH2

(C) (D)

Br OH

PC—Series P 21 [ P.T.O.

CH2CH2CH2 CH3
55. Find the appropriate synthetic route to synthesise from the
O2N
following alternatives.

CH3CH2 CH2CH2 Cl HNO3
(A) H2SO4
AlCl3

CH3CH2 CH2COCl Zn/Hg HNO3
(B)
AlCl3 conc. HCl H2SO4

CH3CH2 CH2COCl HNO3 Zn/Hg
(C) conc. HCl
AlCl3 H2SO4

CH3CH2 CH2COCl LiAlH4 HNO3
(D)
AlCl3 ether H2SO4

CH2CH2CH2 CH3
55ú ë™ïK[i¡ Î}ìÅÃÈìo¹ \>¸ [>´•[º[Jt¡ [¤A¡¿P¡[º ë=ìA¡ l¡üš™åv¡û¡ š‡ý¡[t¡ [>샢ŠA¡¹¡ú
O2N

CH3CH2 CH2CH2 Cl HNO3
(A) H2SO4
AlCl3

CH3CH2 CH2COCl Zn/Hg HNO3
(B)
AlCl3 conc. HCl H2SO4

CH3CH2 CH2COCl HNO3 Zn/Hg
(C) conc. HCl
AlCl3 H2SO4

CH3CH2 CH2COCl LiAlH4 HNO3
(D)
AlCl3 ether H2SO4

56. Best process to synthesise Me3C — CN will be

(A) Me3C — OH is allowed to react with HCN (B) Me3C — Br is treated with NaCN

(C) Me3C — Li is reacted with NH2 — CN (D)Me3CMgBr is coupled with Cl — CN

56ú Me3C — CN šøÑñ[t¡¹ Τ¢àìšÛ¡à ®¡àº š‡ý¡[t¡ Òº

(A) Me3C — OH &¹ Îàì= HCN &¹ [¤[yû¡Úà (B) Me3C — Br &¹ Îàì= NaCN &¹ [¤[yû¡Úà

(C) Me3C — Li &¹ Îàì= NH2 — CN &¹ [¤[yû¡Úà (D)Me3CMgBr * Cl — CN &¹ [¤[yû¡Úà Qi¡àì>à

PC—Series P 22

57. Which of the following pairs forms biodegradable polymer?
(A) H2NCH2COOH and H2N(CH2)5COOH
(B) HOCH2CH2OH and HOOC COOH

(C) CH = CH2 and CH2 = CH — CH = CH2
(D) CH2 = CH — CN and CH2 = CH — CH = CH2

57ú [>´•[º[Jt¡ ëA¡à>ô ë\àØl¡[i¡ í\¤ [¤ìÅÃȸ š[º³à¹ Kk¡> A¡ì¹?
(A) H2NCH2COOH &¤} H2N(CH2)5COOH
(B) HOCH2CH2OH &¤} HOOC COOH

(C) CH = CH2 &¤} CH2 = CH — CH = CH2
(D) CH2 = CH — CN &¤} CH2 = CH — CH = CH2
58. D(+) glucose on reaction with hydroxylamine produces an oxime. The structure of the
generated oxime is
(A) CH = NOH (B) CH = NOH

H OH HO H
HO H HO H
HO H H OH
H OH H OH

CH2OH CH2OH

(C) CH = NOH (D) CH = NOH

HO H H OH
H OH HO H
HO H H OH
H OH H OH

CH2OH CH2OH
58ú D(+) NÃåìA¡àì\¹ ÎìU ÒàÒül¡ö[Gº "¸à[³ì>¹ [¤[yû¡ÚàÚ &A¡[i¡ "[G³ K[k¡t¡ ÒÚ¡ú l¡ü;šÄ "[Gì³¹ Kk¡> Î}ìA¡t¡ Òº
(A) CH = NOH (B) CH = NOH

H OH HO H
HO H HO H
HO H H OH
H OH H OH

CH2OH CH2OH

(C) CH = NOH (D) CH = NOH

HO H H OH
H OH HO H
HO H H OH
H OH H OH

CH2OH CH2OH

PC—Series P 23 [ P.T.O.

59. Doxycycline belongs to which of the following classes of antimicrobial?

(A) Broad-spectrum bactericidal antibiotic

(B) Narrow-spectrum bacteriostatic antibiotic

(C) Broad-spectrum bacteriostatic antibiotic

(D) Limited-spectrum bacteriostatic antibiotic

59ú l¡[GÎàÒü[Aá> [>´•[º[Jt¡ ëA¡à>ô "¸à[@i¡³àÒüìyû¡à[¤ÚຠëÅøoã¹ "”zK¢t¡?

(A) ¤øl¡-ëÑšA¡i¡öà³ ¤¸àA¡ìi¡[¹[Îl¡àº "¸à[@i¡¤àìÚà[i¡A¡

(B) >¸àì¹à-ëÑšA¡i¡öà³ ¤¸àA¡ìi¡[¹*С¸à[i¡A¡ "¸à[@i¡¤àìÚà[i¡A¡

(C) ¤øl¡-ëÑšA¡i¡öà³ ¤¸àA¡ìi¡[¹*С¸à[i¡A¡ "¸à[@i¡¤àìÚà[i¡A¡

(D) [º[³ìi¡l¡-ëÑšA¡i¡öà³ ¤¸àA¡ìi¡[¹*С¸à[i¡A¡ "¸à[@i¡¤àìÚà[i¡A¡

60. Which of the following is the example of liquid detergent used to clean utensils?

(A) CH3(CH2)10CH2OSO3– Na+

(B) H19C9 O — (CH2 — CH2 — O)5 — CH2CH2OH

(C) H3C SO–3Na+

+
(D) CH3(CH2)15 — N(CH3)3Br–

60ú ¤àÎ>šy ë‹àÚ๠A¡àì\ ¤¸¤Òê¡t¡ t¡¹º [l¡i¡à¹ì\ì@i¡¹ l¡üƒàÒ¹o [>´•[º[Jt¡P¡[º¹ ³ì‹¸ ëA¡à>[i¡?
(A) CH3(CH2)10CH2OSO3– Na+

(B) H19C9 O — (CH2 — CH2 — O)5 — CH2CH2OH

(C) H3C SO–3Na+

+
(D) CH3(CH2)15 — N(CH3)3Br–

PC—Series P 24

SPACE FOR ROUGH WORK

PC—Series P 25 [ P.T.O.

SPACE FOR ROUGH WORK

PC—Series P 26

SPACE FOR ROUGH WORK

PC—Series P 27 [ P.T.O.

SPACE FOR ROUGH WORK

PC—Series P 28 FF21—1345×3