MCQ 1> Which of the following gas has greatest contribution in global warming?
A) CFC
B) NO
C) CH4
D) CO2
Answer
CO2
MCQ 2> Vapor density of a gas is 14. Then the volume occupied by 2.8 g of that gas at STP is
A) 11.2 L
B) 1.12 L
C) 22.4 L
D) 2.24 L
Answer
B) 1.12 L
MCQ 3> There is a small hole in metallic disc. If it is heated then the area of the hole will be
A) Increase
B) Decrease
C) remain unchanged
D) first decrease then increase
Answer
Increase
MCQ 4> For which of the following color does a lens have maximum focal length?
A) Red
B) Orange
C) Greed
D) Violet
Answer
A) Red
MCQ 5> If two resistances each of 10 Ohms are connected in parallel, then the equivalent resistance will be
A) 20 Ohm
B) 10 Ohm
C) 5 Ohm
D) 2.5 Ohm
Answer
C) 5 Ohm
MCQ 6> The source of high energy of sun and various stars is
A) nuclear fusion
B) self-reduction
C) carbon reduction
D) nuclear fission
Answer
Nuclear fission
MCQ 7> Which harmful rays of sun absorbs by ozone layers?
A) X ray
B) Bita Ray
C) Ultraviolet Ray
D) Gama Ray
Answer
Ultraviolet Ray
MCQ 8> What is the dimension of volume expansion coefficient?
A) [K]
B) [K-1]
C) [MLTK]
D) [MLTK-1]
Answer
B) [K-1]
MCQ 9> What is the change of focal length of a lens when it is immersed within water?
A) focal length will increase
B) focal length will decrease
C) remain unchanged
Answer
B) focal length will decrease
MCQ 10> What is the resistance of a filament of a bulb having a rating 220V-110W?
A) 4 Ohm
B) 40 Ohm
C) 400 Ohm
D) 440 Ohm
Answer
D) 440 Ohm