Chemistry Questions

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:

Name the noble gas which is placed in the third period and eighth group of the Modern Periodic table.

A) Helium B) Argon
C) Neon D) Krypton
 
Answer & Explanation Answer: B) Argon

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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:

The Chemical formula of Ammonium oxalate is _____.

A) NH4C2O4 B) (NH4)2CO4
C) (NH4)2C2O4 D) (NH4)2C2O3
 
Answer & Explanation Answer: C) (NH4)2C2O4

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Q:

The poisonous gas accidentally released in Bhopal Gas Tragedy is

A) Methane B) Nitrous Oxide
C) Methyl Isocyanate D) Cyanogen
 
Answer & Explanation Answer: C) Methyl Isocyanate

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Q:

Which of the following is a commercial source of energy?

A) Agricultural waste B) Dried dung
C) Sun D) Natural gas
 
Answer & Explanation Answer: D) Natural gas

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Q:

Which of the following elements has the lowest melting point?

A) Platinum B) Carbon
C) Cobalt D) Krypton
 
Answer & Explanation Answer: D) Krypton

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Q:

NaCl has ______.

A) nonpolar bonds B) polar covalent bonds
C) Metallic bonds D) ionic bonds
 
Answer & Explanation Answer: D) ionic bonds

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