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 Chemistry Questions

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Q:

Which of the following is not an Igneous Rock?

A) Dolomite B) Granite
C) Basalt D) Gabbro
 
Answer & Explanation Answer: A) Dolomite

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Q:

Magnetite is an ore/mineral of

A) Beryllium B) Chromium
C) Iron D) Lead
 
Answer & Explanation Answer: C) Iron

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Q:

Which among the following is used to generate light, to weld metals?

A) Ethylene B) Acetylene
C) Glycol D) Oxalic acid
 
Answer & Explanation Answer: B) Acetylene

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Q:

What  is  the  number  of  atoms  in  46  g  of sodium-23 (N = Avogadro constant)?

A) N/2 B) N
C) 2N D) 23 N
 
Answer & Explanation Answer: C) 2N

Explanation:
Number of atoms in 46 grams of sodium - 23 will be 2N.
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Q:

The depletion in Ozone layer is caused by ___________ .

A) Nitrous oxide B) Carbon dioxide
C) Chlorofluorocarbons D) Methane
 
Answer & Explanation Answer: C) Chlorofluorocarbons

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Q:

Acid rain is caused due to pollution of atmosphere by

A)  oxides of nitrogen and sulphur B)  oxides of nitrogen and phosphorous
C) oxides of carbon and nitrogen D)  oxides of nitrogen and methane
 
Answer & Explanation Answer: C) oxides of carbon and nitrogen

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Q:

The reaction of Copper Sulphate and Iron produces Iron Sulphate and __________.

A) Vinegar B) Ash
C) Baking Soda D) Copper
 
Answer & Explanation Answer: D) Copper

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Q:

___ is amphoteric in nature.

A) SO2 B) CaO
C) ZnO D) N2O
 
Answer & Explanation Answer: C) ZnO

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