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 Chemistry Questions

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Q:

Which method will be employed to test the hardness of water?

A) Boiling B) Distillation
C) Formation of lather with soap D) None of these
 
Answer & Explanation Answer: C) Formation of lather with soap

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Q:

Which of the following types of water is known to be absolutely free from any impurity?

A) Mineral Water B) Distilled Water
C) Spring Water D) Boiled Water
 
Answer & Explanation Answer: B) Distilled Water

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Q:

There are ............ metalloids in the modern periodic table.

A) 5 B) 4
C) 7 D) 6
 
Answer & Explanation Answer: D) 6

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Q:

The elements known as primary nutrients for plants

A) Nitrogen, Phosphorus and Potassium B) Nitrogen, Oxygen and Silicon
C) Potassium, Boron and Nitrogen D) Nitrogen, Phosphorus and Iron
 
Answer & Explanation Answer: A) Nitrogen, Phosphorus and Potassium

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Q:

Which of the following elements has the lowest melting point?

A) Zinc B) Titanium
C) Sulphur D) Fluorine
 
Answer & Explanation Answer: D) Fluorine

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Q:

The passage of an electric current through a conducting liquid causes ___________.

A) Galvanisation B) Evaporation
C) Physical Reaction D) Chemical Reaction
 
Answer & Explanation Answer: D) Chemical Reaction

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Q:

Name the gas used in preparation of bleaching powder

A) Oxygen B) Hydrogen
C) Nitrogen  D) Chlorine
 
Answer & Explanation Answer: D) Chlorine

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Q:

Manganite is an ore/mineral of

A) Beryllium B) Chromium
C) Manganese D) Copper
 
Answer & Explanation Answer: C) Manganese

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