Questions

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:
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Q:

The maximum number of electrons that can be accommodated in a shell depends on the formula

 

A) 1n2 B) n2
C) 3n2 D) 2n2
 
Answer & Explanation Answer: D) 2n2

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Q:

Select the antonym of

diligence

A) lethargy B) exertion
C) vigour D) assiduity
 
Answer & Explanation Answer: A) lethargy

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Q:

Which pair of atoms has the highest electronegativity difference?

 

(Calcium's electronegativity is 1.0

Fluorine's electronegativity is 4.0

Hydrogen's electronegativity is 2.2

Sodium's electronegativity is 0.93)

A) F-F B) Ca-F
C) H-F D) Na-F
 
Answer & Explanation Answer: D) Na-F

Explanation:

F-F = 4 - 4 = 0

Ca-F = 4 - 1 = 3.0

H-F = 4 - 2.2 = 1.8

Na-F = 4 - 0.93 = 3.07

 

Hence, the highest electronegativity difference is in Na-F.

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Q:

Which compound matches the IR Spectrum?

 

spectr1525848245.jpg image

A) 1, 5 – hexadiene B) 3 – Hexanol
C) Trans – 4 – octene D) None of the above
 
Answer & Explanation Answer: A) 1, 5 – hexadiene

Explanation:

3 – Hexanol:


image

There is no alcohol stretch present in the spectrum. Therefore, the above structure is not suitable for the given spectrum.

 

Trans – 4 – octene:


image

There is no vinyl bending present in the spectrum. Therefore, the above structure is not suitable for the given spectrum.


1, 5 – hexadiene:


image

The vinyl bending and other stretches were matched with the above structure.

 

 

Hence, the c = c stretch, vinyl bending and image stretch were matched with the above structure.

Therefore, the given spectrum belongs to 1, 5 – hexadiene.

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Q:

Select the antonym of

outlandish

A) droll B) kinky
C) common D) grotesque
 
Answer & Explanation Answer: C) common

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Q:

Select the synonym of

bounder

A) lout B) mediocre
C) done D) decorous
 
Answer & Explanation Answer: A) lout

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Q:

Select the antonym of

 

cameo

 

A) trinket B) gem
C) bauble D) plain
 
Answer & Explanation Answer: D) plain

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