GSEB Std 10 Question Paper 2020 Science (Gujarati Medium)

-10 -2 2020- 21

TOTAL MARKS: - 25 :- (11) TIME: - 45 MINUTES

:- 12 , .
A

.( ) (4 )
1 .
(i) C + O2 CO2
(ii) H2 + O2 H2O
(iii) 2Pbo + C Pb + CO2
(iv) Fe2O3 + 2Al Al2O3 + 2Fe 1
(A) .
(B) (i), (ii) (iv) .
(C) (i) (iv) .
(D) (i), (ii) (iii) .
2 :” .” 1
3 :-
1
‘ .’
4 :
1
........................ .

B

.( ) (8 )
5 .
2
.
6 .
2
, .
7 (a), (b), (c) (d) .

? ,

2
(a) (b)

(c) (d)
.

8 8 ‘ ’
. 2
.

C

.( ) (9 )
9 a) ?
b) ? 3
c) (a) (b) ?
10 .
. ( )
.
a) ? ?
. . . 3
b) - . ?
. . .
.
11 .
.

3

.
O, O2, O3
.
.

D
. (4 )
12 a) . 2
b) . 2

-10 2020-21
- 25 :- (11) :- 45
:- 12
-A
( ) ( )
-
(i) C + O2 CO2
(ii) H2 + O2 H2O
(iii) 2Pbo + C Pb + CO2
(iv) Fe2O3 + 2Al Al2O3 + 2Fe
(A)
(B) (i), (ii) (iv)
(C) (i) (iv)
(D) (i), (ii) (iii)
- :“
-
“ “
-
, ........................
-B
( ) ( )
-

-
( ),
-

?
, ?
-
(a) (b)

(c) (d)

- ‘ ’
?
–C
( )
- a) ?
b) ?
c) (a) (b) ( ) ?
-

a) ? ?
. .
b) - ? ,
. .

-

‘ ’

O, O2, O3

–D
( )
- a) (Heart)
b)

UNIT TEST 2 2020-21 STD - X (11) SCIENCE ENGLISH MEDIUM
TOTAL MARKS: - 25 TIME: - 45 MINUTES
--------------------------------------------------------------------------------------------------------------
INSTRUCTIONS: - THERE ARE 4 SECTIONS AND 12 QUESTIONS IN THIS PAPER.

SECTION A

Do as directed. ( 1 mark Each ) ( 4 Marks)
Q -1 Identify balanced chemical equations from the following.

(Select correct answer from the given options.)

(i) C + O2 CO2
(ii) H2 + O2 H 2O
(iii) 2Pbo + C Pb + CO2 01
(iv) Fe2O3 + 2Al AL2CO3 + 2Fe

(a) All of above are balanced.
(b) (i), (iii), and (iv) are balanced.
(c) (i) and (iv) are balanced.
(d) (i), (ii) and (iii) are balanced.
Q-2 Identify me: I am the vessel which carries blood away from the heart to various
01
organs of the body.
State whether the following statement is true or false. Correct it if it is incorrect.
Q-3 “The Centre of the reflecting surface of a spherical mirror is called the pole of the 01
mirror.”
Q-4 Fill in the blank to make the given statement correct.
The substances that are decomposed by biological process are called __________ 01
substances.

SECTION B
Answer the following questions. ( Each question carries 2 marks) ( 8 Marks)
Q-5 Write a balanced chemical equation for the following chemical reaction.
“Aqueous solution of common salt reacts with carbon dioxide and ammonia to 02
from ammonium chloride and sodium hydrogen carbonate.”
Q-6 Give the scientific reason:
02
The small intestine of a lion is shorter in length than that of a deer.
Q-7 Fill in the missing details in below table.
State type State position, nature and size of
use of mirror or an image when object placed at
lens used distance equal to its focal length.
(a) (b) 02
Rear view in vehicles
(?) (?)
To observe minute parts of (C) (d)
watch by watch repairer (?) (?)

Q-8 Our prime minister shree Narendrabhai Modi launched a ‘Gandagi Mukt Bharat’
program on 8th august. Explain in your own words about how would you plan 02
waste management to make such programs successful.
SECTION C
Answer following questions. ( Each question carries 3 marks) ( 9 Marks)
Q-9 (a) Why do we paint objects made up of iron?
(b) Why is Nitrogen gas filled in food packets containing oil and fats? 03
(C) Which processes are responsible for (a) and (b)?
Q-10 Perform the following activity at your home and answer the questions based on
your observation.
Take a big shining spoon try to observe your face on its convex surface (bulging).
(a) Do you see the image? Is it big or small? Note the distance between your face
03
and spoon in centimeters.
(b) Take the spoon away from your face slowly. Does the image get inverted? if
yes, again measure and write the distance between spoon and face in
centimeters. If No, state the reason for that.
Q-11 Ozone molecules are constantly formed and destroyed in the atmosphere. A
picture (cartoon) showing how ozone molecules are formed is shown below.

03

A family member of yours who has never studied about this tries to understand
the cartoon pictures but is unable to understand it. He knows that there are no
such living forms in atmosphere but he is not able to understand names like O, O2
and O3 and also the process explained.
How would you explain it to that family member? State in your own words.

SECTION D
Answer the following questions in detail. ( 4 Marks)
Q-12 (a) Draw a labeled diagram showing internal structure of human heart.
2
(b) Explained in short about four organs of human excretory system.
2