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Q:

Which one of the following is commonly used as an indicator to measure the exact pH?

 

A) Eosin B) Phenolphthalein
C) Universal indicator D) Litmus
 
Answer & Explanation Answer: C) Universal indicator

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Q:

Washing soda is used ______.

 

I. for removing permanent hardness of water

 

II. for disinfecting drinking water

 

III. as a cleaning agent for domestic purpose

 

A) Only I and II B) Only I and III
C) Only II and III D) All I, II and III
 
Answer & Explanation Answer: B) Only I and III

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Q:

Ionic compounds ______.

 

I. have high boiling point

II. have high melting point

III. conduct electricity in solution

 

A) Only I and II B) Only I and III
C) Only II and III D) All I, II and III
 
Answer & Explanation Answer: D) All I, II and III

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Q:

Atmosphere of Venus mostly contains which of the following gases? 

 

A) Nitrogen  B) Hydrogen 
C) Oxygen  D) Carbon dioxide
 
Answer & Explanation Answer: D) Carbon dioxide

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Q:

Find the similarity in the following :

 

Carbon, Silicon, Boron, Arsenic

 

A) All of them are gases B) All of them are non-metals
C) All of them are metals D) No similarity
 
Answer & Explanation Answer: B) All of them are non-metals

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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:

Metals are generally ______.

I. Ductile

II. Malleable

III. Poor conductors of heat

A) Only I and II B) Only I and III
C) Only II and III D) All I, II and III
 
Answer & Explanation Answer: A) Only I and II

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Q:

Factors that may influence enzyme activity?

 

A) pH B) Substrate concentration
C) Temperature D) All the above
 
Answer & Explanation Answer: D) All the above

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