Chemistry Questions

Q:

The gas evolved when sodium carbonate reacts with hydrochloric acid is

A) Hydrogen B) Chlorine
C) Hydrogen Chloride D) Carbon dioxide
 
Answer & Explanation Answer: D) Carbon dioxide

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Q:

Which of the following elements was the last element in Newland's Law of Octaves?

A) Thorium B) Hydrogen
C) Rubidium D) Bromine
 
Answer & Explanation Answer: A) Thorium

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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 is called quicksilver?

A) Titanium B) Mercury
C) Platinum D) Radium
 
Answer & Explanation Answer: B) Mercury

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Q:

Matter is classified as a

A) pure substance B) mixture
C) both 1 & 2 D) none of the above
 
Answer & Explanation Answer: C) both 1 & 2

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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:

Select the INCORRECT set of Molecular Formula - IUPAC Name - Common Name from the following options.

A) C4H9OH B) C2H3OH - Methanol - Methyl Alcohol
C) C2H5OH - Ethanol - Ethyl Alcohol D) C3H7OH - Propanal - Propyl Alcohol
 
Answer & Explanation Answer: B) C2H3OH - Methanol - Methyl Alcohol

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Q:

Atomic mass of Nitrogen is 14 and that of Hydrogen is 1. What will be the molecular mass of Ammonia?

A) 18 B) 17
C) 16 D) 15
 
Answer & Explanation Answer: B) 17

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