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:

Saturated Hydrocarbons are called

A) alkynes B) isomers
C) alkanes D) alkenes
 
Answer & Explanation Answer: C) alkanes

Explanation:
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0 620
Q:

Carbon dioxide is one of the gases that cause the _________.

 

A) greenhouse effect   B) ozonification  
C) oven phenomenon   D) sunburn  
 
Answer & Explanation Answer: A) greenhouse effect  

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0 6187
Q:

Out of all known elements, the minimum number is of ______.

 

A) Metals   B) Non-metals  
C) Metalloids D) No option is correct
 
Answer & Explanation Answer: C) Metalloids

Explanation:
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0 7124
Q:

Which of the following has largest atomic radius?

 

A) Li B) Be
C) B D) O
 
Answer & Explanation Answer: A) Li

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0 18473
Q:

___ is the transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase.

 

 

A) Sublimation B) Evaporation
C) Condensation D) Liquidation
 
Answer & Explanation Answer: A) Sublimation

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0 791
Q:

Dried fruit like raisins when soaked in water, bulge and get filled with water. What is the scientific reason that explains this daily life event?

 

A) Osmosis B) Active Transport
C) Diffusion D) Passive Transport
 
Answer & Explanation Answer: A) Osmosis

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1 867
Q:

The most abundant of the rare gases i ?

 

A) Helium B) Argon
C) Neon D) Nitrogen
 
Answer & Explanation Answer: B) Argon

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3 6835
Q:

What is the purpose of adding Gypsum to the cement?

 

A) For lubrication B) To slow down its rate of setting
C) To increase its rate of setting D) To make it strong
 
Answer & Explanation Answer: B) To slow down its rate of setting

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