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 Chemistry Questions

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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:

Synthetic detergents are prepared from

A) potassium salts of higher fatty­acids B) sodium salts of higher fatty­acids
C) hydrocarbons of petroleum D) glycerides
 
Answer & Explanation Answer: C) hydrocarbons of petroleum

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Q:

Metals react with sodium hydroxide to produce ___________.

A) oxygen gas B) sodium
C) water D) hydrogen gas
 
Answer & Explanation Answer: D) hydrogen gas

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Q:

When iron rusts, its weight .....

A) decreases B) increases
C) remains the same D) first increases and then decreases
 
Answer & Explanation Answer: B) increases

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Q:

Bauxite is used as raw material by which industry

A) Aluminium B) Iron
C) Steel D) Gold
 
Answer & Explanation Answer: A) Aluminium

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Q:

Iron and manganese present as pollutants in water cannot be removed by_____

A) oxidation followed by settling and filtration B) chlorination
C) ion exchange process D) lime soda process or manganese zeolite process
 
Answer & Explanation Answer: B) chlorination

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Q:

Which one of the following is a good electrical conductor?

A) Graphite B) Diamond
C) Peat D) Charcoal
 
Answer & Explanation Answer: A) Graphite

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Q:

The reaction of Copper Sulphate and Iron produces Iron Sulphate and __________.

A) Vinegar B) Ash
C) Baking Soda D) Copper
 
Answer & Explanation Answer: D) Copper

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