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Q:

Order of basicity of amines in gaseous state?

A) 2'> 1'> 3' > NH3 B) 3' > 2' > 1'> NH3
C) 1' > 2' > 3'> NH3 D) 2'> 3'> 1' > NH3
 
Answer & Explanation Answer: B) 3' > 2' > 1'> NH3

Explanation:

The order of basicity in ammonia is different in gaseous phases vs. aqueous phases due to hydrogen bonding.

 

So in gaseous phases it's the well known: 3' > 2' > 1'> NH3. Just so we're on the same page, this is due to the inductive effect of electron donating alkyl groups--they destabilize the lone pair on nitrogen atom, making nitrogen more basic.

 

But in aqueous phase, the order is slightly different: 2'> 1'> 3' > NH3.

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Filed Under: Chemistry
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Q:

Which three dynasties are known as "Muventar"?

A) Pandya, Chola, Chera B) Pallava, Chola, Pandya
C) Pallava, Chera, Pandya D) Pallava, Chola, Chera
 
Answer & Explanation Answer: A) Pandya, Chola, Chera

Explanation:
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Filed Under: Indian History

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Q:

Teotihuacan Pyramids is located in which country?

A) Agentina B) Peru
C) Mexico D) Laos
 
Answer & Explanation Answer: C) Mexico

Explanation:
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Filed Under: Famous Places

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Q:

Which of the statements given below are correct?

 

A) Rafael Nadal won the Tennis 2017 Wimbledon Championships Men's Singles.


B) Aryan Tari won the 2017 World Junior Chess Championship.


C) Viktor Axelsen won the Men's Singles Badminton 2017 BWF World Championships.

 

A) Only A B) Only B
C) Both B and C D) None of these
 
Answer & Explanation Answer: C) Both B and C

Explanation:
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Filed Under: Sports
Exam Prep: Bank Exams

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Q:

Which of the following is an example of compound?

 

A) Manganese B) Air
C) Ozone D) Ammonia gas
 
Answer & Explanation Answer: D) Ammonia gas

Explanation:
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Filed Under: Chemistry
Exam Prep: Bank Exams

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Q:

Which of following sectors does NOT come under tertiary sector?

 

A) Electricity B) Business Services
C) Transport D) Trade
 
Answer & Explanation Answer: A) Electricity

Explanation:
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Filed Under: Indian Economy
Exam Prep: Bank Exams

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Q:

What is so delicate that even mentioning it breaks it?

Answer

Silence is what is so delicate that even mentioning it breaks it.

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Subject: Logic Puzzles Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE , TOEFL
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Q:

Which of the following features may occur when lava cool at the surface

A) Basalt plateau B) Still
C) Batholith D) Dyke
 
Answer & Explanation Answer: A) Basalt plateau

Explanation:
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Filed Under: World Geography

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