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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:

Ammonium nitrate, on thermal decomposition, produces :

A) NH3 and NO2 B) NH3 and NO
C) N2 and H2O D) N2O and H2O
 
Answer & Explanation Answer: D) N2O and H2O

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Q:

Which of the following elements was the last element in Newland's Law of Octaves?

A) Thorium B) Hydrogen
C) Rubidium D) Bromine
 
Answer & Explanation Answer: A) Thorium

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Q:

Two or more elements combine to form a

A) atom B) valency
C) compound D) radical
 
Answer & Explanation Answer: C) compound

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Q:

If tan (5x ­- 10°) = cot (5y + 20°), then the value of x + y is

A) 15° B) 16°
C) 22.5° D) 24°
 
Answer & Explanation Answer: B) 16°

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Q:

Where did the telegraph line be laid first?

A) Calcutta to Agra B) Agra to Jaipur
C) Delhi to Shimla D) Raniganj to Calcutta
 
Answer & Explanation Answer: A) Calcutta to Agra

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Q:

Humayun (1530–1540 AD) was the ruler of which dynasty?

A) Nanda B) Mughal
C) Maurya D) Haryanka
 
Answer & Explanation Answer: B) Mughal

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Q:

When was Guru Nanak Dev born?

A) 1449 AD B) 1453 AD
C) 1469 AD D) 1499 AD
 
Answer & Explanation Answer: C) 1469 AD

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