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 Chemistry Questions

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Q:

Atomic number of which of the following elements is greater than that of Copper?

A) Iron B) Chromium
C) Zinc D) Manganese
 
Answer & Explanation Answer: C) Zinc

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Q:

What are isobars?

A) Elements with same atomic number but different mass number B) Elements with different atomic number but same mass number
C) Elements with different atomic number and different mass number D) Elements with same atomic number and same mass number
 
Answer & Explanation Answer: B) Elements with different atomic number but same mass number

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Q:

Methane an air pollutant is produced ______.

A) by action of ultraviolet light on nitrogenous compounds. B) as a by-product of manufacturing ammoniacal fertilizers
C) by burning of coal in insufficient air D) by digestion of food by animals
 
Answer & Explanation Answer: D) by digestion of food by animals

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Q:

An unbalanced chemical equation is called a

A) rough chemical equation B) natural chemical equation
C) complex chemical equation D) skeletal chemical equation
 
Answer & Explanation Answer: D) skeletal chemical equation

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Q:

The Chemical formula of Acetic acid is _____.

A) CH3COH B) CH3COOH
C) CH3COCH3 D) CH2COOH
 
Answer & Explanation Answer: D) CH2COOH

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Q:

Atomic number of which of the following elements is greater than that of Aluminium?

A) Phosphorus B) Neon
C) Magnesium D) Sodium
 
Answer & Explanation Answer: A) Phosphorus

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Q:

Which of the following compounds is the strongest acid?

A) p-nitrophenol B) phenol
C) m-nitrophenol D) p-cresol
 
Answer & Explanation Answer: A) p-nitrophenol

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Q:

In the reaction H2O2 + Cl2 -----> 2HCl + O2, H2O2 acts as

A) an acid B) an oxidising agent
C) a reducing agent D) a base
 
Answer & Explanation Answer: C) a reducing agent

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