Chemistry Questions

Q:

Which of the following is not an example of Allotrope?

A) Diamond B) Graphite
C) Ozone D) Steel
 
Answer & Explanation Answer: D) Steel

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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 among the following is an example of solid sol?

A) Milk of magnesia B) Foam
C) Coloured gemstones D) Rubber
 
Answer & Explanation Answer: C) Coloured gemstones

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Q:

Tooth decay starts when the pH of the mouth is lower than

A) 5.7 B) 5.5
C) 5.6 D) 5.4
 
Answer & Explanation Answer: B) 5.5

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Q:

Barium loses ____ electrons to achieve noble gas electron configuration.

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: B) 2

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1 1862
Q:

Which of the following gases is not generated in a biogas plant?

A) H2S B) CO2
C) CH4 D) CO
 
Answer & Explanation Answer: D) CO

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1 1862
Q:

Atomic number of which of the following elements is greater than that of Chlorine

A) Potassium B) Sulphur
C) Aluminium D) Phosphorus
 
Answer & Explanation Answer: A) Potassium

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2 1862
Q:

Metals reacts with acids to give:

A) a salt and chlorine B) a salt and hydrogen
C) a salt and water D) a salt and base
 
Answer & Explanation Answer: B) a salt and hydrogen

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