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Q:

Which of the following is used for disinfecting drinking water?

A) Baking powder B) Bleaching powder
C) Washing soda D) Baking soda
 
Answer & Explanation Answer: B) Bleaching powder

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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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Q:

Sphalerite is an ore/mineral of

A) Mercury B) Molybdenum
C) Silver D) Zinc
 
Answer & Explanation Answer: D) Zinc

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Q:

15% of an alloy was silver. If in a quantity of alloy there was 51 g of silver, what was the quantity of the other elements in the alloy?

A) 204 g B) 340 g
C) 300 g D) 289 g
 
Answer & Explanation Answer: D) 289 g

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Q:

Which of the following metals displaces Iron from Iron Chloride?

A) Lead B) Zinc
C) Tin D) Silver
 
Answer & Explanation Answer: B) Zinc

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Q:

What happens as we go down the group in the periodic table?

A) The number of shells decreases B) Valence electrons decreases
C) The number of shells increases D) Atomic size decreases
 
Answer & Explanation Answer: C) The number of shells increases

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Q:

Acid Rain has pH value of

A) 5.5 or less B) 12.5 or more
C) 10.5 or more D) 8.5 or more
 
Answer & Explanation Answer: A) 5.5 or less

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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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