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Q:

Which of the following gas was released during Bhopal gas tragedy?

A) Methyl isocyanate B) Sodium isothiocyanate
C) Nitrogen isothiocyanate D) Potassium isothiocyanate
 
Answer & Explanation Answer: A) Methyl isocyanate

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Q:

The upper part of the heterosphere is composed almost completely of which gas?

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

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Q:

When Granite rocks get metamorphosed, they form

A) Quartzite B) Gneiss
C) Marble D) Slate
 
Answer & Explanation Answer: B) Gneiss

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Q:

Most liquids that conduct electricity are solutions of acids, bases and ______.

A) Copper B) Aluminium
C) Salts D) Iron
 
Answer & Explanation Answer: C) Salts

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Q:

Which one of the following gases dissolves in water to give acidic solution?

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

Explanation:

Carbon dioxide (CO2) gas dissolved in water can cause water to become acidic.The acidity of water from dissolved CO2 can be reduced by a base such as baking soda (sodium bicarbonate).

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Q:

Which base is present in lime water?

A) Sodium hydroxide B) Magnesium hydroxide
C) Calcium hydroxide D) Ammonium hydroxide
 
Answer & Explanation Answer: C) Calcium hydroxide

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Q:

How many elements are present in the group of the 18th Modem Periodic Table?

A) 5 B) 2
C) 6 D) 7
 
Answer & Explanation Answer: D) 7

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0 1397
Q:

Which of the following inert gases is placed in period 4 of the periodic table?

A) Kr B) Rn
C) Xe D) Ar
 
Answer & Explanation Answer: A) Kr

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