Gen- Science for Class IX
Max Marks: 25
Time: 50 Minutes
Class: _________________Section________________ Date:___________________
Student’s Full Name: ___________________________ Roll #:__________________
Invigilator’s Signature : ________________ Examiner’s Signature:_____________
Marks Obtained:____________________ Rechecked by:_______________________
MCQs
Q.1 On the given answer grid black out the box for your choice with a pencil
1. A
B
C
D
5. A
B
C
D
9. A
B
C
D
2. A
B
C
D
6. A
B
C
D
10. A
B
C
D
3. A
B
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D
7. A
B
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4. A
B
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8. A
B
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D
1). The substitute of natural gas is;
a. Nitrogen gas
b. Methane gas
c. Hydrogen gas
d. Oxygen gas
2). The residue of biomass is used as;
a. Biogas
b. Fuel
c. Fertilizer
d. Gasoline
a.
b.
c.
d.
(10 Marks)
3). Big tides of water are generated in the sea due to attraction of;
Wind force
Earth
Gravity
Moon
4). The energy per square meter reaches the earth’s surface after disperse most of it;
a. 10 Kilo-watt
b. 1.4 Kilo-watt
c. 1 Kilo-watt
d. 1000 Kilo-watt
5).
a.
b.
c.
d.
Normally large plates painted black in solar pennels because;
Black colour is good absorbant of heat
In night they could be hide
In daylight black colour makes house dark
Black colour is durable rather than any colour used
6). An bulb of 250 Watt consumes 2.5 units of electricity in an hour.Thw units of
electricity consumes by 500 Watt of an electric bulb in 5 hrs would be;
a. 50 Kilo-watt
b. 200 Kilo-watt
c. 24 Kilo-watt
d. 2.5 Kilo-watt
7). A gas act as a glass of green house effect of an environment;
a. CO2
b. O2
c. H2
d. N2
8). Air is present from the earth’s surface up to;
a. 300 Kilometres
b. 500 Kilometres
c. 200 Kilometres
d. 400 Kilometres
9). Genes of living body can be affected by;
a. Harmful gases
b. Radiations
c. Smog
d. Smoke
10). The energy stored in a body by pressing, streching or twisting is known as;
a. Potential energy
b. Chemical energy
c. Kinetic energy
d. Elastic energy
CRQ’s
Q.1(a). Define energy? Explain the conversion of energy with two examples.
(b). How does gas meter works?
(3 marks)
(2 marks)
Q.2(a). State the Law of conservation of energy and explain it with two suitable examples. (3 marks)
(b). How electricity is produce by tidel power?
(2 marks)
ERQ’s (Attempt any one Q.3 or Q.4 )
Q.3 What is thermal pollution and explain its impact on environment?
(5 marks)
OR
Q.4 How to conserve energy? Suggest the ways to conserve energy with the help of real life example.
(5marks)