Chemistry Questions

Q:

NaCl is a salt which is made up of

A) Strong acid and weak base B) Weak acid and weak base
C) Strong acid and strong base D) Weak acid and strong base
 
Answer & Explanation Answer: C) Strong acid and strong base

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Q:

Which of the following metals does NOT react with cold or hot water?

A) Aluminium B) Potassium
C) Sodium D) Calcium
 
Answer & Explanation Answer: A) Aluminium

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Q:

Metal oxides which react with acids as well as bases are called

A) Amphoteric oxides B) Neutral oxides
C) Basic oxides D) Acidic oxides
 
Answer & Explanation Answer: A) Amphoteric oxides

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Q:

Which is the first metallic element in the Modern Periodic Table?

A) Li B) Na
C) He D) H2
 
Answer & Explanation Answer: A) Li

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Q:

Non-metallic character increases from ____.

A) Magnesium to Barium B) Potassium to Caesium
C) Oxygen to Selenium D) Sodium to Chlorine 
 
Answer & Explanation Answer: D) Sodium to Chlorine 

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Q:

One of the techniques used for desalination of sea water is

A) Filtration B) Distillation
C) Evaporation D) Condensation
 
Answer & Explanation Answer: B) Distillation

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Q:

Which of the following metals reacts vigorously with cold water?

A) Potassium B) Aluminium
C) Zinc D) Iron
 
Answer & Explanation Answer: A) Potassium

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Q:

In the process of ___, the iron is protected by a coating of zinc.

A) greasing B) alloying
C) galvanisation D) anodising
 
Answer & Explanation Answer: C) galvanisation

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