Q:

Conservation of energy refers to the fact that

A) if you conserve energy you will not be as tired	B) energy cannot be created or destroyed but can be converted from one form to another
C) no chemical reaction is 100 percent efficient	D) the entropy of the universe is always increasing

Answer & Explanation Answer: B) energy cannot be created or destroyed but can be converted from one form to another

Explanation:

"Conservation of energy" refers to the fact that energy cannot be created or destroyed but can be converted from one form to another.

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Q:

Sound waves cannot travel through

A) Gas	B) Liquid
C) Vacuum	D) Solid

Answer & Explanation Answer: C) Vacuum

Explanation:

Sound waves cannot travel through a Vacuum.

A vacuum is an area without any air, like space. So sound cannot travel through space because there is no matter for the vibrations to work in.

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Q:

Plant cells perform photosynthesis, which occurs in the

A) Nucleus	B) Mitochondria
C) Cytoplasm	D) Chloroplasts

Answer & Explanation Answer: D) Chloroplasts

Explanation:

Photosynthesis takes place inside plant cells in small things called chloroplasts.

Chloroplasts contain a green substance called chlorophyll and this absorbs the light energy needed to make photosynthesis happen.

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Q:

Foliated rocks are distinguished by

A) layers	B) minerals
C) colors	D) names

Answer & Explanation Answer: A) layers

Explanation:

Foliated rocks are distinguished by layers.

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Q:

The primary agent of contact metamorphism is

A) Temperature	B) Pressure
C) Weathering	D) Flowing water

Answer & Explanation Answer: A) Temperature

Explanation:

The primary agent of contact metamorphism is heat or temperature.

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Q:

The shape of the nucleus is maintained by

A) the nuclear lamina	B) the nuclear envelope
C) the nucleolus	D) the endoplasmic reticulum

Answer & Explanation Answer: A) the nuclear lamina

Explanation:

The shape of the nucleus is maintained by the nuclear lamina.

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Q:

A starts a business, after 6 months B also join him with Rs.4500 and after 2 months of B’s joining C also join them with Rs.4500. If A gets approx. Rs 4900 out of total annual profit of Rs. 10,000 then find the approximate value of initial investment of A.

A) Rs.4800	B) Rs.4200
C) Rs.3600	D) Rs.4400

Answer & Explanation Answer: C) Rs.3600

Explanation:

Let initial investment of A = x
Ratio of profit A : B : C = 12 × x : 6×4500 :4×4500
A :B:C = x : 2250: 1500
Now ATQx/(x+2250+1500) = 4900/10000
solving this we get,x ≈ Rs 3600

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Q:

A sentence has been given in Active/Passive Voice. Out of the four given alternatives, select the one which best expresses the same sentence in Passive/Active Voice.

The dog killed the cat.

A) The cat is killed by the dog.	B) The cat got kill by the dog.
C) The dog was responsible for killing the cat.	D) The cat was killed by the dog.

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