Sawaal
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
Related Questions
Q:

Process of loosing electrons is known as _____.

A) oxidation B) reduction
C) radiation D) both oxidation and reduction
 
Answer & Explanation Answer: A) oxidation

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 1033
Q:

Ozone is an ______ of oxygen.

A) Allotrope B) Isotope
C) Isobar D) Isotone
 
Answer & Explanation Answer: A) Allotrope

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 1371
Q:

Which of the following is an Inert Gas?

A) Hydrogen B) Nitrogen
C) Oxygen D) Argon
 
Answer & Explanation Answer: D) Argon

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 1744
Q:

pH of the human blood is ______.

A) Slightly Acidic B) Highly Acidic
C) Slightly Basic D) Highly Basic
 
Answer & Explanation Answer: C) Slightly Basic

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 1341
Q:

A radio-active substance has a half life of six months. Three-fourth of the substance will decay in ______.

A) Six months B) Ten months
C) Twelve Months D) Twenty four months
 
Answer & Explanation Answer: C) Twelve Months

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 1174
Q:

Chemical composition of cement is

A) Limestone and Clay B) Limestone, Clay and Gypsum
C) Limestone and Gypsum D) Clay and Gypsum
 
Answer & Explanation Answer: B) Limestone, Clay and Gypsum

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 930
Q:

The most abundant element in the earth's atmosphere is

A) Argon B) Nitrogen
C) Oxygen D) Krypton
 
Answer & Explanation Answer: B) Nitrogen

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 1011
Q:

Consider the following constituent gases of the atmosphere :

1. Argon

2. Neon

3. Helium

4.Ceirbon dioxide

Which one of the following is the correct ascending sequence of the above gases in terms of the volume percentage?

A) 1-3-2-4 B) 1-4-2-3
C) 4-2-3-1 D) 2-4-1-3
 
Answer & Explanation Answer: B) 1-4-2-3

Explanation:
Composition of Dry Air (Substance, % by volume)
Nitrogen, N2 78.08
Oxygen, O2
20.95
Argon, Ar 0.93
Carbon dioxide, CO2 0.033
Neon, Ne 0.0018
Helium, He 0.00052
Methane, CH4 0.0002
Krypton, Kr 0.00011
Dinitrogen oxide, N2O 0.00005
Hydrogen, H2 0.00005
Ozone, O3 0.000001
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 16907