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Q:

Match the following items.

A) I – 2, II – 3, III – 4, IV – 1 B) I – 2, II – 3, III – 1, IV – 4
C) I – 3, II – 2, III – 1, IV – 4 D) I – 2, II – 1, III – 3, IV – 4
 
Answer & Explanation Answer: A) I – 2, II – 3, III – 4, IV – 1

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Q:

The chemical formula of Propane is

A) C3H8 B) C4H10
C) C2H6 D) CH4
 
Answer & Explanation Answer: A) C3H8

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Q:

The chemical weathering of feldspar produces

A) illite B) kaolinite
C) both 1 & 2 D) none
 
Answer & Explanation Answer: C) both 1 & 2

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Q:

Which of the following is usually not an air­pollutant?

A) Hydrocarbons B) Sulphur dioxide
C) Carbon dioxide D) Nitrous oxide
 
Answer & Explanation Answer: D) Nitrous oxide

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Q:

How many atoms are present in one molecule of Ozone?

A) 4 B) 1
C) 2 D) 3
 
Answer & Explanation Answer: D) 3

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Q:

Which of the following fuel has maximum calorific value?

A) Petrol B) Coal
C) Wood D) Cow dung  
 
Answer & Explanation Answer: A) Petrol

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Q:

Metals are placed on which side of the Modern Periodic table?

A) Top row B) Left side
C) Right side D) Bottom row
 
Answer & Explanation Answer: B) Left side

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Q:

Which among the following difference between aerobic and anaerobic respiration is INCORRECT?

A) Aerobic respiration takes place in presence of oxygen – Anaerobic respiration takes place in the absence of oxygen   B) In Aerobic respiration pyruvate is broken down into ethanol and carbon dioxide – In Anaerobic respiration pyruvate is broken down into carbon dioxide and water
C) In Aerobic respiration more energy is released – In Anaerobic respiration less energy is released   D) Aerobic respiration takes place in mitochondria– Anaerobic respiration takes place in yeast  
 
Answer & Explanation Answer: B) In Aerobic respiration pyruvate is broken down into ethanol and carbon dioxide – In Anaerobic respiration pyruvate is broken down into carbon dioxide and water

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