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Question 21
A
0.64 [B  
B
5.73 
C
1.56 
D
0.7 
E
0.54 
Explanation.
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Correct Option:
A



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Question 24
A
bent, linear and tetrahedral  
B
bent, tetrahedral and linear  
C
tetrahedral, linear and bent  
D
linear, bent and tetrahedral  
Explanation.
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Correct Option:
D


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Question 26
A
hydrogen bonding  
B
covalent bonding  
C
ionic bonding  
D
metallic bonding  
E
van-der- waals bonding.  
Explanation.
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Correct Option:
B

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Question 27
A
Adding iron filings to aerated water  
B
Adding sodium metal to water  
C
Cooling a solution of iron(II) sulphate to obtain the hydrated salt  
D
Cooling water to obtain ice  
Explanation.
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Correct Option:
D

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Question 28
A
it gives offensive taste  
B
excess calcium is precipitated  
C
it encourages the growth of bacteria  
D
it attacks lead contained in pipes  
Explanation.
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Correct Option:
D


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Question 30
A
ascorbic acid and citric acid  
B
citric acid and ascetic acid  
C
citric acid and dilute HCl  
D
citric acid and salicyclic acid  
E
Sulphuric acid  
Explanation.
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Correct Option:
A

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