Questions

Q:

___ is not a chemical change.

A) Cooking an egg B) Melting an ice cube
C) Baking a cake D) Rotting Bananas
 
Answer & Explanation Answer: B) Melting an ice cube

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Q:

What is the upward force exerted by water called?

A) Density B) Buoyant force
C) Gravitation D) Friction
 
Answer & Explanation Answer: B) Buoyant force

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Q:

One step in the production of hydroelectric power involves _____.

A) falling water that turns a turbine  B) electric current flowing across a dam
C) hot water from under the ground D) tides that pour through a barrier dam
 
Answer & Explanation Answer: A) falling water that turns a turbine 

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Q:

The speed of the light is maximum in

A) Air B) Vacuum
C) Water D) Glass
 
Answer & Explanation Answer: B) Vacuum

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Q:

The acceleration due to gravity at the surface of the earth (mass M and radius R) is proportional to ___.

A) MR B) M/R2
C) M2/R D) M/R
 
Answer & Explanation Answer: B) M/R2

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Q:

An object of 5.0 kg is raised through a height of 2.0m. The work done in the process is

A) 49 J B) 10 J
C) 19.6 J D) 98 J
 
Answer & Explanation Answer: D) 98 J

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Q:

The energy released at the end of digestion is in the form of

A) thermal energy B) electric energy
C) kinetic energy D) chemical energy
 
Answer & Explanation Answer: D) chemical energy

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Q:

Indian Government is hopeful of bringing at least one crore subscribers by March 2018 under the Atal Pension Yojana (APY). What is the age limit for APY?

 

A) 21 to 60 years B) 18 to 40 years
C) 18 to 45 years D) 21 to 70 years
 
Answer & Explanation Answer: B) 18 to 40 years

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