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:

Select the option that correctly matches the contents of the first column with the contents of the second column.

 

A. Elements combine in fixed ratios I. Dalton's atomic theory
B. Atoms are indivisible II. The same number of molecules
C. Sulphate and Oxalate ions are anions, whereas magnesium and III. Law of constant proportions
D. Gram atomic mass of an element and the gram molecular mass of a compound contain IV. Ammonium ions are cations

 

A) A-III, B-II, C-IV, D-I B) A-III, B-I, C-IV, D-II
C) A-III, B-IV, C-I, D-II D) A-I, B-III, C-IV, D-II
 
Answer & Explanation Answer: B) A-III, B-I, C-IV, D-II

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams

0 698
Q:

Which of the following statements is wrong with regard to strong acids?

A) Strong acids react very rapidly with other substances (such as metal carbonates and metal hydrogen carbonates) B) Hydrochloric acid, Sulphuric acid and Nitric acid are strong acids
C) Acids are those chemical substances that have a salty taste D) All minerals acids are strong acids
 
Answer & Explanation Answer: C) Acids are those chemical substances that have a salty taste

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 554
Q:

Acids that contain Hydrogen and other non-metallic element(s), except Oxygen, are called

A) Hydracids B) Dilute acids
C) Strong acids D) Weak acids
 
Answer & Explanation Answer: A) Hydracids

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 977
Q:

What is the percentage of methane in biogas?

A) 90% B) 80%
C) 60% D) 75%
 
Answer & Explanation Answer: D) 75%

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 872
Q:

What are stars primarily made of?

A) Oxygen and Hydrogen B) Hydrogen and Carbon
C) Hydrogen and Helium D) Oxygen and Helium
 
Answer & Explanation Answer: C) Hydrogen and Helium

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 690
Q:

Which of the following is not a greenhouse gas?

A) Carbon dioxide B) Methane
C) Chlorofluorocarbons D) Oxygen
 
Answer & Explanation Answer: D) Oxygen

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 736
Q:

Dissolving is best described as

 

A) molecules breaking into ions B) a change from a solid to a liquid
C) breaking covalent bonds D) a mingling of molecules and/or ions
 
Answer & Explanation Answer: D) a mingling of molecules and/or ions

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 29725
Q:

What is the chemical formula of Ozone?

A) O B) O2
C) O3 D) O4
 
Answer & Explanation Answer: C) O3

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 765