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:

Which one is the pure element

A) glass B) cement
C) sodium D) None of these
 
Answer & Explanation Answer: C) sodium

Explanation:
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Filed Under: Chemistry

82 12540
Q:

Air is 

A) compound B) element
C) mixture D) solution
 
Answer & Explanation Answer: C) mixture

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Filed Under: Chemistry

3 3503
Q:

Milk is a 

A) mixture B) element
C) metal D) None of these
 
Answer & Explanation Answer: A) mixture

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Filed Under: Chemistry

5 3824
Q:

Which one is not metal

A) sulpher B) sugar
C) nitogen D) all of these
 
Answer & Explanation Answer: D) all of these

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Filed Under: Chemistry

84 14851
Q:

Antimony is

A) metal B) non metal
C) non metaloid D) metalloid
 
Answer & Explanation Answer: D) metalloid

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Filed Under: Chemistry

3 3796
Q:

The substances that are composed of to or more different elements in fixed proportion by mass are called

A) mixture B) compound
C) element D) None of these
 
Answer & Explanation Answer: B) compound

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5 4843
Q:

The law of constant proportions was enunciated by

A) Dalton B) Berthelot
C) Avogadro D) Proust
 
Answer & Explanation Answer: D) Proust

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16 9238
Q:

Sodium carbonate crystal lose water molecules this property is called

A) hygroscopy B) deliquescence
C) efflorescence D) None of these
 
Answer & Explanation Answer: C) efflorescence

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Filed Under: Chemistry

63 18258