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 General Science Questions

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Q:

Which of the following is not a commercial source of energy?

A) Coal B) Petroleum
C) Natural Gas D) Firewood
 
Answer & Explanation Answer: D) Firewood

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Q:

What is the main cause of temperature rise in the interior of the Earth?

A) Pressure B) Breakdown of radioactive substances
C) Both the pressure and breakdown of radioactive substances D) No option is correct
 
Answer & Explanation Answer: C) Both the pressure and breakdown of radioactive substances

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Q:

How many steps are there in Suryanamaskar?

A) 24 B) 12
C) 6 D) 3
 
Answer & Explanation Answer: B) 12

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Q:

Which is used as an Air pollution indicator?

A) Algae B) Fungi
C) Bacteria D) Lichens
 
Answer & Explanation Answer: D) Lichens

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Q:

_______ determines colour, texture, chemical properties, mineral content and permeability of soil.

A) Flora & Fauna B) Time
C) Climate D) Parent rock
 
Answer & Explanation Answer: D) Parent rock

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Q:

What is organic matter in soil is also called

A) residue B) humus
C) occlusion D) compact
 
Answer & Explanation Answer: B) humus

Explanation:

In soil, organic matter consists of plant and animal material that is in the process of decomposing. When it has fully decomposed it is called humus. Soil organic matter serves as a reservoir of nutrients for crops, provides soil aggregation, increases nutrient exchange, retains moisture, reduces compaction,... 

This humus is important for soil structure because it holds individual mineral particles together in clusters.

 

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Q:

Marble comes under which category of rocks?

A) Sedimentary B) Igneous
C) Metamorphic D) None of these
 
Answer & Explanation Answer: C) Metamorphic

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Q:

The salt concentration (measured as salinity in parts per thousand), is less than ______ % in inland waters.

A) 5 B) 20
C) 50 D) 75
 
Answer & Explanation Answer: A) 5

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