Sawaal
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
Related Questions
Q:

In modern periodic table while going from top to bottom in a group ______.

 

A) size of an atom increases B) size of an atom decreases
C) ionisation energy of an atom increases D)  size and ionisation energy of an atom increases
 
Answer & Explanation Answer: D)  size and ionisation energy of an atom increases

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 10656
Q:

Rupee 5 and 10 coins are now made of

A) Ferritic stainless steel B) Silver and steel
C) Cupro nickel alloy D) Copper and brass
 
Answer & Explanation Answer: C) Cupro nickel alloy

Explanation:

The copper nickel alloys composed of copper with 25% nickel with 0.05-0.4% manganese is commonly used for the manufacture of coins, medals and other semi valuable applications.

 

Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 462
Q:

If the electronic configuration of elements A and B are 1S2, 2S2 2P6, 3S1 and 1S2, 2S2 2P6, 3S2 3P4 respectively, then the formula of the compound formed by the combination of these elements will be:

 

A) AB3 B) AB2
C) A2B D) AB
 
Answer & Explanation Answer: C) A2B

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 536
Q:

Who first discovered the every eighth element had properties similar to that of the first?

 

A) Newlands B) Moseley
C) Dobereiner D) Mendeleev
 
Answer & Explanation Answer: A) Newlands

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

1 9821
Q:

Burning Magnesium ribbon produces white ash, which dissolves in water to form____.

 

A) Magnesium Halides B) Magnesium Oxide
C) Magnesium Hydroxide D) Magnesium Sulphate
 
Answer & Explanation Answer: C) Magnesium Hydroxide

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams

1 11838
Q:

Fill in the blank with the most appropriate option.

 


An element attains stability when it achieves ________ state.

 

A) an only-duplet B) an only-octet
C) a duplet or octet D) a heptate
 
Answer & Explanation Answer: C) a duplet or octet

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams

0 12636
Q:

Least distance of distinct vision for normal eye is

A) 15 cm B) 20 cm
C) 25 cm D) 30 cm
 
Answer & Explanation Answer: C) 25 cm

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: Bank Exams

0 485
Q:

Blotting paper absorbs ink due to

A) Coarse nature of paper B) Osmosis
C) Capillary action D) Siphoning
 
Answer & Explanation Answer: C) Capillary action

Explanation:
Report Error

View Answer Report Error Discuss

Filed Under: Chemistry
Exam Prep: AIEEE , Bank Exams

1 792