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Q:

Which of the following is used in making perfumes as well as flavouring agents?

 

A) Esters B) Ethanol
C) Methanol D) Ethanoic acid
 
Answer & Explanation Answer: A) Esters

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Q:

Which of the following element is NOT a metal?

 

A) Al   B) P  
C) Ca D) K
 
Answer & Explanation Answer: B) P  

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Q:

Which subatomic particle has a positive charge?

 

A) Proton B) Neutron
C) Electron D) Ion
 
Answer & Explanation Answer: A) Proton

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Q:

An ionic bond involves _____.

 

A) the sharing of a single pair of electrons B) an attraction between ions of opposite charge
C) the unequal sharing of an electron pair D) water avoidance
 
Answer & Explanation Answer: A) the sharing of a single pair of electrons

Explanation:

In ionic bonding, the atoms are bound by attraction of oppositely charged ions, whereas, in covalent bonding, atoms are bound by sharing electrons to attain stable electron configurations.

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Q:

Which of the following solutions is alkaline?

 

A) H+ <1 × 10-7 Mol/l B) H+ = 1 × 10-4 Mol/l
C) H+ = 1 × 10-7 Mol/l D) H+ > 1 × 10-7 Mol/l
 
Answer & Explanation Answer: A) H+ <1 × 10-7 Mol/l

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Q:

Which of the following is an example of compound?

 

A) Manganese B) Air
C) Ozone D) Ammonia gas
 
Answer & Explanation Answer: D) Ammonia gas

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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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Q:

The activation energy for the reverse reaction is represented by

 

A) A B) B
C) C D) D
 
Answer & Explanation Answer: B) B

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