Questions

Q:

At what temperature (in Fahrenheit) pure water freezes?

A) 0 B) 17
C) 32 D) 39
 
Answer & Explanation Answer: C) 32

Explanation:

32oFWe know that T(°F) = T(°C) × 1.8 + 3232(°F) = 0(°C)

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Q:

Which has the lowest albedo?

A) dark surfaces B) light surfaces
C) Both A & B D) None of the above
 
Answer & Explanation Answer: A) dark surfaces

Explanation:

Albedo refers to a material's ability to reflect sunlight. Since 30% of the sun's energy is reflected by the entire earth, the earth has an average albedo of 0.30.

Generally, dark surfaces have a low albedo and light surfaces have a high albedo.

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Q:

Carbon in the ocean originates from the atmosphere.

A) TRUE B) FALSE
Answer & Explanation Answer: A) TRUE

Explanation:

True, the carbon in the ocean originates from the atmosphere. The oceanic surface water absorbs the carbon dioxide gas from the atmosphere and dissolves in it.

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Q:

Which statement is one component of the cell theory?

A) DNA is the basis of genetic transfer B) All living cells arise from pre-existing cells
C) All cells are composed of same organelles D) Tissues are formed from combinations of cells
 
Answer & Explanation Answer: B) All living cells arise from pre-existing cells

Explanation:

All living cells arise from pre-existing cells is one component of the cell theory.

 

The Cell Theory is one of the basic principles of biology.

 

The Cell Theory states:

1. All living organisms are composed of cells. They may be unicellular or multicellular.

2. The cell is the basic unit of life.

3. Cells arise from pre-existing cells.

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Q:

Which is not a topography produced by volcanocity

A) Cones B) Crater
C) Caldera D) Cirque
 
Answer & Explanation Answer: D) Cirque

Explanation:
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Q:

The only known ruler in the history of india to have fixed the prices of different commodities, rigidly enforced quality control and ensured easy availability of essential commodities was

A) lltutmish B) Alauddin Khalji
C) Raziya D) Gayasuddin Tughluq
 
Answer & Explanation Answer: B) Alauddin Khalji

Explanation:
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Q:

What element is found in all organic compounds?

A) Hydrogen B) Calcium
C) Nitrogen D) Carbon
 
Answer & Explanation Answer: D) Carbon

Explanation:

Carbon is found in all organic compounds.

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Q:

Lightning is produced when 

A) Similar charges of electricity rush towards each other and then get repelled B) clouds strike against impurities in air and the friction burns up these impurities
C) strong opposite charges in different clouds break down the resistance offered by the intervening air D) water vapour produces electricity in the clouds
 
Answer & Explanation Answer: C) strong opposite charges in different clouds break down the resistance offered by the intervening air

Explanation:

When the resistance of the air between breaks down the current flows from the positive cloud to the negative cloud in a flash which we call lightning . The difference of potential involves is very high.

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