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Q 1/20
Score 0
5 joule= _________cal
30
4.2
0.24
2.2
1.2
Q 2/20
Score 0
Which among the following is INCORRECT regarding the use of detergent washing clothes?
30
It is added to increase adhesive force between water and cloth
It is added to decrease surface tension
It is added to decrease adhesive force between water and cloth
It is added to decrease cohesive force between water molecules
20 questions
Q.
5 joule= _________cal
1
30 sec
Q.
Which among the following is INCORRECT regarding the use of detergent washing clothes?
2
30 sec
Q.
The force of attraction between two like molecules is called as______
3
30 sec
Q.
Ray of light is incident obliquely at the water-air interface, then the refracted ray will _____
4
30 sec
Q.
When a glass prism causes dispersion of white light, the colour deviated least is ________
5
30 sec
Q.
The band of seven colors obtained due to dispersion of white light is called as______
6
30 sec
Q.
The angle through which a ray of light turns on passing through a prism is called ________.
7
30 sec
Q.
Rainbow is an example of which of the following phenomena of light?
8
30 sec
Q.
If the angle of incidence is 0 degree then angle of refraction will be______?
9
30 sec
Q.
Identify the type of lens in the image that follows?
10
30 sec
Q.
Which of the following correctly represents the nature of the image formed in the given figure
11
30 sec
Q.
The distance between principal focus and optical center of lens is called its_____
12
30 sec
Q.
A real, inverted and highly magnified image is formed by convex lens, if the object is______
13
30 sec
Q.
Virtual image is formed by convex lens, when object is____
14
30 sec
Q.
A concave lens will always produce a _____ image.
15
30 sec
Q.
Identify the correct energy conversion from the following
16
30 sec
Q.
Substance A has a higher specific heat capacity than substance B.? If both have equal mass then which of the two would require more heat energy for the same rise in temperature.
17
30 sec
Q.
On heating a kettle of water on a stove, the hot water at the bottom of the kettle begins to rise and the cooler water at the top will sink to the bottom. This is an example of
18
30 sec
Q.
Which is true regarding solids?
19
30 sec
Q.
The heat gained or lost by a body during a change of state is the product of its _______ and the specific latent heat.
