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Q:

Binomial Nomenclature was founded by

A) Charles Darwin B) Robert Nucleus
C) Carl Linnaeus D) Lamarck
 
Answer & Explanation Answer: C) Carl Linnaeus

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Q:

Which of the following allotropes of Carbon is used as a reducing agent in metallurgy?

A) Carbon Black B) Graphite
C) Charcoal D) Coke
 
Answer & Explanation Answer: D) Coke

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Q:

____ is the most electropositive and ___ is the most electronegative element of the third period of modern periodic table.

 

A) Sodium, Potassium B) Magnesium, Aluminium
C) Sodium, Chlorine D) Aluminium, Chlorine
 
Answer & Explanation Answer: C) Sodium, Chlorine

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Q:

Chemical properties of isotopes .............

A) must be same B) must be different
C) need not be same D) need not be different
 
Answer & Explanation Answer: A) must be same

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Q:

What happens when one S and one P orbital is hybridized?

A) We get three orbitals in a plane B) We get two orbitals at 180 degrees
C) We get two mutually perpendicular orbitals D) We get four orbitals directed tetrahedrally
 
Answer & Explanation Answer: B) We get two orbitals at 180 degrees

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Q:

What is the percentage of methane in biogas?

A) 90% B) 80%
C) 60% D) 75%
 
Answer & Explanation Answer: D) 75%

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Q:

Why do atoms bond?

A) To reduce potential energy and gain stability B) To make atoms
C) To increase potential energy and lose stability D) To increase potential energy and gain stability
 
Answer & Explanation Answer: A) To reduce potential energy and gain stability

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Q:

Sphalerite is an ore/mineral of

A) Mercury B) Molybdenum
C) Silver D) Zinc
 
Answer & Explanation Answer: D) Zinc

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