Rajasthan Board Class 12 Question Paper 2024 Agriculture Chemistry

RAJASTHAN BOARD

QUESTION
PAPER
2024

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Zm_m§H$ Roll No.

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No. of Questions – 20 SS–38–Ag.Chem.
No. of Printed Pages – 11

Cƒ _mÜ`{_H$ narjm, 2024
SENIOR SECONDARY EXAMINATION, 2024
H¥${f agm¶Z {dkmZ

TEAR HERE TO OPEN THE QUESTION PAPER
AGRICULTURE CHEMISTRY
g_` : 3 KÊQ>o 15 {‘ZQ>

àíZ nÌ H$mo ImobZo Ho$ {bE `hm± \$m‹S>|
nyUmªH$ : 56

narjm{W©`m| Ho$ {bE gm_mÝ` {ZX}e …
GENERAL INSTRUCTIONS TO THE EXAMINEES :
1) narjmWu gd©àW_ AnZo àíZ nÌ na Zm_m§H$ A{Zdm`©V… {bI| &
Candidate must write first his / her Roll No. on the question paper compulsorily.
2) g^r àíZ A{Zdm`© h¡ &
All the questions are compulsory.
3) àË`oH$ àíZ H$m CÎma Xr JB© CÎma-nwpñVH$m _| hr {bI| &
Write the answer to each question in the given answer-book only.
4) {OZ àíZm| _| AmÝV[aH$ IÊS> h¢, CZ g^r Ho$ CÎma EH$ gmW hr {bI| &
For questions having more than one part, the answers to those parts are to be
written together in continuity.
5) àíZ nÌ Ho$ {hÝXr d A§J«oOr ê$nmÝVa _| {H$gr àH$ma H$s Ìw{Q> / AÝVa / {damoYm^mg hmoZo na {hÝXr ^mfm Ho$
àíZ H$mo ghr _mZ| &
If there is any error / difference / contradiction in Hindi & English version of the
`hm± go H$m{Q>E

question paper, the question of the Hindi version should be treated valid.
6) àíZ H$m CÎma {bIZo go nyd© àíZ H$m H«$‘m§H$ Adí¶ {bI|&
Write down the serial number of the question before attempting it.

SS-38-Ag.Chem. 5030 [ Turn Over

2
IÊS> - A
SECTION - A
dñVw{Zð> àíZ :
Multiple Choice Questions :
1) {ZåZ{b{IV àíZm| ‘| CÎma H$m ghr {dH$ën M¶Z H$a CÎma nwpñVH$m ‘| {b{IE &
In the following questions, select the correct answer and write it in the answer
book.
i) CËn{V Ho$ AmYma na Am½Zo` MÅ>mZm| H$mo ^mJm| _| {d^ŠV {H$`m J`m h¡ - [½]
(A) Xmo (~) VrZ
(g) Mma (X) nm§M
On the basis of origin igneous rocks have been divided into parts -
(A) Two (B) Three
(C) Four (D) Five
ii) 2Fe2O3 + 3H2O  2Fe2O3.3H2O g_rH$aU _| B§{JV hmo ahm h¡ - [½]
(A) Ob AnKQ>Z (~) AmŠgrH$aU
(g) Ob `moOZ (X) H$m~m}ZrH$aU
2Fe2O3 + 3H2O  2Fe2O3.3H2O being indicate in the equation is -
(A) Hydrolysis (B) Oxidation
(C) Hydration (D) Carbonation
iii) øy_g H$mo _¥Xm _| {_bmZo go _¥Xm H$s YZm`Z {d{Z_` j_Vm na à^md n‹S>Vm h¡ - [½]
(A) ~‹T> OmVr h¡ (~) H$_ hmo OmVr h¡
(g) `WmdV ahVr h¡ (X) CnamoŠV _| go H$moB© Zht
The presence of humus in the soil affects the cation exchange capacity -
(A) Increased (B) Decreases
(C) As it is (D) None of above
iv) dh àH«$_ {Og_| _¥Xm _| CnpñWV ZmBQ´>oQ>, ZmBQ´>g Am°ŠgmB©S> _| n[ad{V©V hmo OmVm h¡ H$hbmVm h¡ -[½]
(A) A_mo{ZH$aU (~) ZmBQ´>rH$aU
(g) A_rZrH$aU (X) {dZmBQ´>rH$aU
The process by which nitrate present in the soil converted in to nitrous oxide
is called -
(A) Ammonification (B) Nitrification
(C) Amminization (D) Denitrification

SS-38-Ag.Chem. 5030

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v) _m°ÝQ>_mo[abmoZmBQ> g_yh H$s YZm`Z {d{Z_` j_Vm (C molkg–1) hmoVr h¡ - [½]
(A) 20 - 40 (~) 3 - 15
(g) 60 - 100 (X) 25 - 30
Cation exchange capacity (C molkg–1) of montmorillonite group is -
(A) 20 - 40 (B) 3 - 15
(C) 60 - 100 (D) 25 - 30
vi) BbmBQ> H$s YZm`Z {d{Z_` j_Vm (C molkg–1) H$m Am¡gV _mZ hmoVm h¡ - [½]
(A) 30 (~) 50
(g) 80 (X) 100
The average value of cation exchange capacity (C molkg–1) of Illite is -
(A) 30 (B) 50
(C) 80 (D) 100
vii) {g{bHo$Q> ³bo Ho$ àH$ma hmoVo h¡ - [½]
(A) Xmo (~) VrZ
(g) Mma (X) nm§M
Types of silicate clay is -
(A) Two (B) Three
(C) Four (D) Five
viii) YmZ H$s \$gb H$mo ~moZo Ho$ {bE _¥Xm H$m Cn`wŠV pH _mZ h¡ - [½]
(A) 4.5 - 5.5 (~) 4.5 - 8.5
(g) 5.0 - 5.5 (X) 9.0 - 9.5
The soil has suitable pH value for cultivation of paddy crop is -
(A) 4.5 - 5.5 (B) 4.5 - 8.5
(C) 5.0 - 5.5 (D) 9.0 - 9.5

SS-38-Ag.Chem. 5030 [ Turn Over

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ix) nr.EM ñHo$b _| pH = 7 àX{e©V H$aVm h¡ - [½]
(A) CXmgrZVm (~) jmar`Vm
(g) Aåbr`Vm (X) Cn`w©ŠV _| go H$moB© Zht
pH = 7 shows in pH scale -
(A) Neutrality (B) Alklinity
(C) Acidity (D) None of above
x) A{YH$m§e nm¡Yo ZmBQ´>moOZ H$mo {H$g ê$n _| J«hU H$aVo h¢? [½]
(A) NO2 (~) NO3
(g) NH4 (X) N2
In which form do most plant absorb nitrogen?
(A) NO2 (B) NO3
(C) NH4 (D) N2
xi) gë\$a nm¡Ym| Ho$ {bE Amdí`H$ nmofH$ VËd h¡, Ho$ A{dîH$maH$ h¡ - [½]
(A) n¡Q>agZ (~) bo{dZ
(g) S>r. í`mga (X) gmg
Sulfur is an essential nutrient for plants, discovered by -
(A) Patterson (B) Lavin
(C) D. Shysar (D) SAS
xii) \$gbm| _| BÊS>mogë\$mZ 35 EC Ho$ à`moJ níMmV à{Vjm Ad{Y h¡ - [½]
(A) 20 - 30 {XZ (~) 15 - 18 {XZ
(g) 10 - 12 {XZ (X) 4 - 5 {XZ
Waiting period after application of endosulfan 35 EC in crops are -
(A) 20 - 30 days (B) 15 - 18 days
(C) 10 - 12 days (D) 4 - 5 days

SS-38-Ag.Chem. 5030

5
xiii) H¥${f agm`Z Ho$ {S>ã~o na A§{H$V M_H$sbm Zrbo a§J H$m _moZmoJ«m_ àX{e©V H$aVm h¡ - [½]
(A) AË`m{YH$ Oharbm (~) A{YH$ Oharbm
(g) _Ü`_ Oharbm (X) H$_ Oharbm
Indication of the bright blue monogram printed on the cans of agrochemicals
is -
(A) Highly poisonous (B) More poisonous
(C) Medium poisonous (D) Less poisonous
xiv) EñH$m°{~©H$ Aåb H$s H$_r go hmoZo dmbm amoJ h¡ - [½]
(A) ñH$du (~) ~oar-~oar
(g) noboJ«m (X) aVm¢Yr
Disease caused by deficiency of ascorbic acid is -
(A) Scurvy (B) Beri-Beri
(C) Pellagra (D) Night blindness
xv) ZÌOZr` O¡d Cd©aH$ EOmoQ>mo~¡ŠQ>a \$gb Ho$ {bE Cn`moJr h¡ - [½]
(A) MZm (~) Joh±ÿ
(g) _Q>a (X) _y±J\$br
Nitrogenous bio Fertilizer azotobacter is used for crop -
(A) Gram (B) Wheat
(C) Pea (D) Groundnut
xvi) CXa OR>a ag _| nm`m OmZo dmbm EÝOmB_ h¡ - [½]
(A) E_mBbmopßgZ (~) Q>m`{bZ
(g) nopßgZ (X) _mëQ>og
Enzyme found in abdominal gastric juice is -
(A) Amylopsin (B) Tylin
(C) Pepsin (D) Maltase

SS-38-Ag.Chem. 5030 [ Turn Over

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2) [aº$ ñWmZm| H$s ny{V© H$s{OE -
Fill in the blanks -
i) MyZm nËWa .......... MÅ>mZ h¡ & [½]
Limestone is a ________ rock.
ii) gm_mÝ`V¶m _¥Xm _| .............. à{VeV Ordm§e (H$m~©{ZH$) nXmW© nm`o OmVo h¢ & [½]
Generally _______ percentage organic matter found in soil.
iii) BbmBQ> H$m amgm`{ZH$ g§aMZm gyÌ ............ hmoVm h¡ & [½]
The chemical structure formula of Illite is ________.
iv) MyZm nËWa H$m Cn`moJ ........... _¥XmAm| H$mo gwYmaZo Ho$ {bE {H$`m OmVm h¡ & [½]
Limestone is used to reclamation of ________ soils.
v) qOH$ H$s H$_r go YmZ _| ............. amoJ hmo OmVm h¡ & [½]
Deficiency of Zinc causes _______ disease in paddy.
vi) nmZr _| âbmoamBS> H$s gmÝÐVm A{YH$ hmoZo na ........... ~r_mar hmo OmVr h¡ & [½]
______ disease occurs when the concentration of fluoride in water is high.
vii) {díd ñdmñÏ` g§JR>Z Ho$ AZwgma no` Ob _| ZmBQ´>oQ> H$s A{YH$V_ gr_m ........... {_.J«m à{VbrQ>a
{ZYm©[aV H$s JB© h¡ & [½]
According to the world Health Organization, the maximum limit of nitrate in
drinking water is _______ mg/liter.
viii) n`m©daU àXÿfU à_wI ê$n go àH¥${VOÝ` Ed§ .......... H$maUm| go hmoVm h¡ & [½]
Environmental pollution is mainly caused by nature and ______ reasons.
ix) ½byH$moO H$m amgm`{ZH$ gyÌ ............. hmoVm h¡ & [½]
The chemical formula of Glucose is _________.
x) Jm` Ho$ XÿY _| nrbmnZ ............ H$s _mÌm Ho$ H$maU hmoVm h¡ & [½]
The Yellowness in Cow's milk is due to the amount of ______.

SS-38-Ag.Chem. 5030

7
3) {ZåZ{b{IV àíZm| Ho$ CÎma EH$ eãX ¶m EH$ n§{º$ ‘| {b{IE -

Write the answer of the following questions in one word or one line -

i) ^mpñ_H$ Am½Zo` MÅ>mZm| _| {g{bH$m H$s à{VeV _mÌm {b{IE & [1]

Write the percentage of silica in basic igneous rocks.

ii) _¥Xm H$mobm°BS>g {H$go H$hVo h¢? [1]

What is Soil Colloids?

iii) ^ñ_ g§V¥á _¥Xm go Š`m A{^àm`: h¡? [1]

What is meant by ash saturated soil?

iv) _¥Xm AåbVm Ho$ àH$ma {b{IE & [1]

Write the types of soil acidity.

v) nm¡Ym| _| nmoQ>o{e`_ nmofH$ VËd H$m H$moB© EH$ H$m`© {b{IE & [1]

Write any one function of potassium nutrient in plant.

vi) ãby~o~r {gÝS´>mo_ Š`m h¡? [1]

What is Blue Baby Syndrome?

vii) ½bmBgrZ Eo_rZm| Aåb H$m g§{já Zm_ {b{IE & [1]

Write the short name of glycine amino acid.

viii) XÿY H$m H$moB© EH$ ^m¡{VH$ JwU {b{IE & [1]

Write any one property of milk.

SS-38-Ag.Chem. 5030 [ Turn Over

8
IÊS> - ~

SECTION - B

bKwÎmamË‘H$ àíZ (CÎma eãX gr‘m bJ^J 50 eãX)

Short answer type questions (Answer word limit approximately 50 words).

4) _¥Xm {Z_m©U H$aZo dmbo H$maH$m| H$m Zm_m§{H$V {MÌ ~ZmBE & [1½]

Draw a labeled diagram of soil forming factors.

5) Ordm§e nXmWm] Ho$ {dÀN>oXZ H$mo à^m{dV H$aZo dmbo VrZ H$maH$m| H$m g§jon _| dU©Z H$s{OE & [3×½=1½]

Briefly describe three factors affecting the decomposition of organic matter.

6) _¥Xm _| hçy_g Ho$ H$moB© VrZ _hËd {b{IE & [3×½=1½]

Write any three importance of humus in soil.

7) YZm`Z {d{Z_` j_Vm Ed§ _¥Xm Cd©aVm _| gå~ÝY H$mo g_PmBE & [1½]

Explain the relationship between cation exchange capacity and soil fertility.

8) _¥Xm pH H$m nm¡Ym| _| nmofH$ VËdm| H$s àmß`Vm na à^md H$mo g_PmBE & [1½]

Explain the effect of soil pH on availability of nutrients in plants.

SS-38-Ag.Chem. 5030

9
9) ‘¥Xm AåbVm H$m nm¡Ym| na AàË`j à^md H$mo g_PmBE & [1½]

Explain the indirect influences of soil acidity on plants.

10) nm¡Ym| _| \$mñ\$moag H$s H$_r Ho$ H$moB© VrZ bjU {b{IE & [3×½=1½]

Write any three symptoms of phosphorus deficiency in plants.

11) amgm`{ZH$ Cd©aH$m| Ûmam hmoZo dmbo àXÿfU H$mo g_PmBE & [1½]

Explain the pollution caused by chemical fertilizers.

12) dm`w àXÿfU Ho$ H$moB© VrZ ñÌmoVm| H$m dU©Z H$s{OE & [3×½=1½]

Describe any three sources of air pollution.

13) ImÚ a§J {H$go H$hVo h¢, BgHo$ Xmo Cn`moJ {b{IE ? [½+1=1½]

What is called edible colour, write two uses of it?

14) O¡{dH$ ImXm| H$m _¥Xm Ho$ O¡{dH$ JwUm| na n‹S>Zo dmbo VrZ à^md {b{IE & [3×½=1½]

Write three effects of organic manure on the biological properties of soil.

15) XÿY Ho$ {ZO©_rH$aU H$s {H«$`m {d{Y H$m dU©Z H$s{OE & [1½]

Describe the mechanism of sterilization of milk.

SS-38-Ag.Chem. 5030 [ Turn Over

10
IÊS> - g
SECTION - C

XrK© CÎmar¶ àíZ (eãX gr‘m bJ^J 100 eãX)
Long answer type questions (Word limit approximately 100 words).

16) jmar` _¥Xm Ho$ gwYma hoVw J§YH$ Ho$ Cn`moJ H$mo {dñVma go g_PmBE & [3]
Explain in detail the use of sulfur for reclamation of alkaline soil.

AWdm/OR

jmar` _¥Xm Ho$ gwYma hoVw {Oßg_ Ho$ Cn`moJ H$mo {dñVma go g_PmBE &

Explain in detail the use of gypsum for reclamation of alkaline soil.

17) EÝOmB_ go Š`m A{^àm`: h¡, BZHo$ dJuH$aU H$mo g_PmBE? [1+2=3]
What is meant by enzyme? Explain their classification?

AWdm/OR

H$m~m}hmBS´>oQ>g go Š`m A{^àm`: h¡, BgHo$ Xmo _w»` dJm} H$m dU©Z H$s{OE?

What is meant by carbohydrate? Describe its two main categories.

18) XÿY H$s nmñVwarH$aU H$s H$_ Vmn A{YH$ g_` {d{Y H$m dU©Z H$s{OE & [3]
Describe the low temperature, long time method of pasteurization of milk.

AWdm/OR

XÿY H$s nmñVwarH$aU H$s Cƒ Vmn Aën g_` {d{Y H$m dU©Z H$s{OE &

Describe the high temperature short time method of pasteurization of milk.

SS-38-Ag.Chem. 5030

11
IÊS> - X
SECTION - D

{Z~ÝYmË‘H$ àíZ (eãX gr‘m bJ^J 250 eãX)
Essay type questions (Word limit approximately 250 words).

19) A_mo{Z`_ gë\o$Q> Cd©aH$ H$m g§JR>Z, H$moB© Xmo JwU, _¥Xm _| A{^{H«$`m VWm \$gbm| na n‹S>Zo dmbo Xmo à^mdm| H$m
dU©Z H$s{OE & [1+1+1+1=4]
Describe the composition, any two properties, soil reaction and two effects of
ammonium sulphate fertilizer on crops.
AWdm/OR
qgJb gwna \$mñ\o$Q> Cd©aH$ H$m g§JR>Z, H$moB© Xmo JwU, _¥Xm _| A{^{H«$`m VWm \$gbm| na n‹S>Zo dmbo Xmo à^mdm|
H$m dU©Z H$s{OE &
Describe the composition, any two properties, soil reaction and two effects of
single super phosphate fertilizer on crops.

20) d_u H$ëMa Š`m h¡? d_u H$ånmoñQ> ~ZmZo H$s {d{Y H$m {dñVma nyd©H$ dU©Z H$s{OE & [1+3=4]

What is vermiculture? Describe in detail the method of making vermi compost.

AWdm/OR
H$ånmoñQ> Š`m h¡? H$ånmoñQ> ~ZmZo H$s ZmS>on {d{Y H$m {dñVmanyd©H$ dU©Z H$s{OE &

What is compost? Describe in detail the Nadep method of making compost.



SS-38-Ag.Chem. 5030

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