107
Q:

Boron cannot form which one of the following anions?

(1) BO2-

(2) BF63-

(3) BH4-

(4) B(OH)4-

A) Option 1 B) Option 2
C) Option 3 D) Option 4

Answer:   B) Option 2



Explanation:

Due to absence of low lying vacant d orbital in B, sp3d2hybridization is not possible hence BF63-will not formed. 

Subject: Chemistry
Exam Prep: AIEEE
Q:

What is the pH of water?

A) 7 B) 5
C) 3 D) 1
 
Answer & Explanation Answer: A) 7

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1 955
Q:

___________ gases absorb long wave (infrared) radiation from the earth and emit it again towards the earth.

A) Methane B) Greenhouse
C) Carbon dioxide D) Ozone
 
Answer & Explanation Answer: B) Greenhouse

Explanation:
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0 893
Q:

Which of the following are highly compressible?

A) Solid B) Liquid
C) Gas D) Solid and Liquid
 
Answer & Explanation Answer: C) Gas

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0 917
Q:

Oxide of which of the following will turn red litmus blue?

A) Magnesium B) Phosphorus
C) Sulphur D) Carbon
 
Answer & Explanation Answer: A) Magnesium

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0 863
Q:

Which of the following gases is produced due to incomplete combustion of fuel?

A) Carbon Dioxide B) Carbon Monoxide
C) Methane D) Ethane
 
Answer & Explanation Answer: B) Carbon Monoxide

Explanation:
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3 842
Q:

Why does carbon tetrachloride have no dipole moment?

A) Because of same size of carbon and chlorine atoms B) Because of regular tetrahedral structure
C) Because of planar structure D) Because of similar electron affinities of carbon and chlorine
 
Answer & Explanation Answer: B) Because of regular tetrahedral structure

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4 823
Q:

Which among the following is false about natural rubber?

A) It is an elastomer B) It is a monomer of cis­isoprene
C) Natural rubber is a polymer of chloroprene D) It is heated with sulphur compounds to improve its properties
 
Answer & Explanation Answer: B) It is a monomer of cis­isoprene

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5 909
Q:

Ethane gas has a slightly ______ taste.

A) sweet B) bitter
C) sour D) salty
 
Answer & Explanation Answer: A) sweet

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6 1597