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Question 1
A
36.2cm3 
B
25.7cm3 
C
72.8cm3 
D
24.3cm3 
Explanation.
General formular of Gas laws

(P1V1) T1= (P2V2) T2

P1 = 800mmHg, V, = 76cm3, Tr = 273 + 27 = 300k

P2 = 760mmHg, V2 = ? T2= 273 + 0 = 273 + 6 = 277k

(800 76) 300 = (760 V2) 273

V2 = (300 76 273) (300 760) = 72.8 cm3

The volume of gas as S.T.P = 72.8 cm3

Correct Option:
C

Question 2
A
P1V1= P2V2 
B
V1 = V2 T1T2 
C
P1T1 = P2T2 
D
P1V1 T1 = P1V1 T2 
Explanation.
Boyles law stats that the volume of a given mass of a gas, at a constant temperature is inversely proportional to us pressure.

Mathematically

V l/p, v = k/p (where k is constant)

K = VP

Let k = k1

Then, if k = k, V and P = V1P1

V1P1 = V2P2

Correct Option:
A

Question 3
A
Locus 
B
Lines 
C
Ray 
D
Beam 
Explanation.
Ray a beam of light or radiation

Correct Option:
C

Question 4
A
100 H 
B
0.01H 
C
10H 
D
1H 
Explanation.
XL = WL = 2FL (w = 2f)

XL = reactance inductor (S.I unit )

L = inductance (L) in Henry

XL = 1, f = 50/, L = ?

1 = 2 50/ L

1 = 100L

i.e. 100L = 1

L = 1/100

0.01H

Inductance (L) of a inductor = 0.01H

Correct Option:
B

Question 5
A
Stationary 
B
In motion 
C
Dipper 
D
Ripple 
Explanation.
Stroboscope is a scientific instrument used to make a wave appears stationary when used

Correct Option:
A

Question 6
A
I only 
B
I and IV only 
C
II only 
D
III only 
Explanation.

In an inelastic collision, linear momentum is conserved and energy is decreased

Momentum and kinetic energy are conserved in elastic collision


Correct Option:
B

Question 7
A
Displaces its own volume of the liquid (fluid) 
B
Displaces its own mass of the fluid 
C
Displace its own density of the fluid 
D
Is no longer subjected to gravity 
Explanation.
Note:The principle of floatation states that a floating body displaces its own weight of the fluid or which its float.

For object to sink weight of the object (W) > upthrust of the fluid (v) i.e. w > u

(i.e. weight of the body (or object) mass of the fluid)

Correct Option:
B

Question 8
A
PV T = a constant 
B
PV = a constant 
C
v/t = a constant 
D
p/T = a constant 
Explanation.
Formula for general gas law

V 1/T P

N [(PV) T] = K is constant

Correct Option:
A

Question 9
A
He saw a flying objects 
B
He must be thinking of water and food 
C
He was seeing the shadow of the car 
D
The sun ray from the sky were passing from a hot air (layer) to cold layer 
Explanation.
The appearance of pool of water on road surfaces is called MIRAGE

His observation show that light from the sun ray refracted through a layer of hot air(layer) which is closed to the ground, passes from a hot air layer to the cold layer

Correct Option:
D

Question 10
A
The sun 
B
The moon 
C
light candle 
D
Star 
Explanation.
Sun are self luminous source
Moon is a non luminous

Correct Option:
B

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