3
Q:

An element X forms an oxide XO_{_{3}}, what ihe valency of X

A) 1 B) 2
C) 3 D) 6

Answer:   D) 6



Explanation:
Subject: Chemistry
Q:

Which of the following is the chemical name of baking soda?

 

A) Sulphate B) Sodium carbonate
C) Sodium hydrogen carbonate D) Calcium hydroxide
 
Answer & Explanation Answer: C) Sodium hydrogen carbonate

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0 19
Q:

What is the chemical name of the deadly poison 'cyanide'?

 

A) Prussic acid B) Sulfuric acid
C) Hydrochloric acid D) Nitric acid
 
Answer & Explanation Answer: A) Prussic acid

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0 85
Q:

Blue litmus paper turns ____ on contact with an acidic solution.

 

A) green B) red
C) yellow D) brown
 
Answer & Explanation Answer: B) red

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1 107
Q:

What is the dominant chemical present in detergent powder?

 

A) Calcium carbonate B) Sodium alkyl sulphate
C) Hydrochloric acid D) Sodium carbonate
 
Answer & Explanation Answer: D) Sodium carbonate

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0 74
Q:

Nitrous Oxide' is the chemical name of ______.

 

A) Tear Gas B) Fire Extinguisher
C) Laughing Gas D) Mosquito Repellent
 
Answer & Explanation Answer: C) Laughing Gas

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1 112
Q:

_____ gases trap heat in the atmosphere which makes the Earth warmer, causing global warming.

 

A) Greenhouse B) Nobel
C) Elemental D) Compound
 
Answer & Explanation Answer: A) Greenhouse

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1 96
Q:

Calcium Sulphate dihydrate is commonly known as ________.

 

A) gypsum B) glass
C) asbestos D) limestone
 
Answer & Explanation Answer: A) gypsum

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1 326
Q:

What is the more common name for solid carbon dioxide?

 

A) Epsom B) Dry Ice
C) Potash D) Quick Silver
 
Answer & Explanation Answer: B) Dry Ice

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2 353