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Q:

In a water molecule, the ratio of mass of Hydrogen to the mass of Oxygen is always:

A) 8:1 B) 7:1
C) 1:7 D) 1:8
 
Answer & Explanation Answer: D) 1:8

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Q:

What is the pH value of human blood?

A) 8.3 B) 6.8
C) 7.4 D) 6
 
Answer & Explanation Answer: C) 7.4

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Q:

Which of the following metals is the most Malleable?

A) Al B) Zn
C) Na D) Ag
 
Answer & Explanation Answer: C) Na

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Q:

Which of the following is NOT the combined from of carbon?

A) Diamond B) Dolomite
C) Marble D) Chalk
 
Answer & Explanation Answer: A) Diamond

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Q:

Which of the following is a CORRECT statement?

A) Only compounds are pure substance B) Compounds are impure substance
C) Only elements are pure substance D) Both compounds and elements are pure substance
 
Answer & Explanation Answer: D) Both compounds and elements are pure substance

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Q:

Which of the following is called Aurum?

A) Bronze B) Gold
C) Silver D) Copper
 
Answer & Explanation Answer: B) Gold

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Q:

Atomic mass of Sulphur is 32 u. The number of moles in 16 grams of Sulphur is:

A) 0.5 moles of Sulphur B) 0.25 moles of Sulphur
C) 0.75 moles of Sulphur D) 1 mole of Sulphur
 
Answer & Explanation Answer: A) 0.5 moles of Sulphur

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Q:

The smell that we get when LPG cylinder leaks is due to the presence of

A) Nitrogen peroxide B) Carbon monoxide
C) Sulphur compound D) Carbon dioxide
 
Answer & Explanation Answer: C) Sulphur compound

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