106
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:

Which of the following is not a Halon gas ?

A) methane B) Carbon tetra chloride
C) iodomethane D) bromomethane
 
Answer & Explanation Answer: A) methane

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1 900
Q:

The chemical formula of Ammonia is _____ .

A) NH B) NH1
C) NH2 D) NH3
 
Answer & Explanation Answer: D) NH3

Explanation:
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0 1156
Q:

Earth's crust mainly contains ______.

A) bauxite B) manganese
C) silica D) iron
 
Answer & Explanation Answer: C) silica

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2 1068
Q:

Atomic number of which of the following elements is greater than that of Phosphorus?

A) Aluminium B) Silicon
C) Chlorine D) Magnesium
 
Answer & Explanation Answer: C) Chlorine

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1 907
Q:

Which of the following elements has the lowest melting point?

A) Helium B) Potassium
C) Tungsten D) Sulphur
 
Answer & Explanation Answer: A) Helium

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1 930
Q:

The common name of lead (II) sulphide is

A) borax B) epsom salt
C) galena D) brimstone
 
Answer & Explanation Answer: C) galena

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1 1009
Q:

The Chemical formula of Ammonium sulphate is

A) NH4SO4 B) (NH4)2SO3
C) NH4SO3 D) (NH4)2SO4
 
Answer & Explanation Answer: D) (NH4)2SO4

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0 1253
Q:

The series of processes by which nitrogen and its compounds are inter-converted in the environment and in living organisms is called _____ .

A) Absorption of Nitrogen B) Ammonification
C) Nitrogen Fixation D) Nitrogen Cycle
 
Answer & Explanation Answer: D) Nitrogen Cycle

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0 874