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 Chemistry Questions

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Q:

Most liquids that conduct electricity are solutions of acids, bases and ______.

A) Copper B) Aluminium
C) Salts D) Iron
 
Answer & Explanation Answer: C) Salts

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Q:

The conversion of hard water into soft water by boiling or adding calcium hydroxide is called _______.

A) Baker's process B) Temp's process
C) Clarke's process D) Lake's process
 
Answer & Explanation Answer: C) Clarke's process

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Q:

The polar ice-caps are made of ____________ water

A) Saline B) Salt
C) Sour D) Fresh
 
Answer & Explanation Answer: D) Fresh

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Q:

Atoms of same element having different mass numbers are called__________

A) Isobars B) Isotopes
C) Isotones D) Isomers
 
Answer & Explanation Answer: B) Isotopes

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Q:

Which base is present in lime water?

A) Sodium hydroxide B) Magnesium hydroxide
C) Calcium hydroxide D) Ammonium hydroxide
 
Answer & Explanation Answer: C) Calcium hydroxide

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Q:

In a compound the elements are always present in definite proportions by ______

A) mass B) volume
C) size D) No option is correct
 
Answer & Explanation Answer: A) mass

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Q:

The most pure form of carbon among the options is

A) Anthracite B) Lampblack
C) Graphite D) Wood Charcoal
 
Answer & Explanation Answer: A) Anthracite

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Q:

Which process is a chemical change?

A) Burning gasoline B) Boiling water
C) Evaporating water D) Melting ice
 
Answer & Explanation Answer: A) Burning gasoline

Explanation:

Burning gasoline is the only process that involving in a chemical change in the given options. A chemical change is a change in the starting substances that are called reactants from the formed new substances that are called products. 

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