Chemistry Questions

Q:

Which of the following induces souring of milk?

A) Acetic Acid B) Citric Acid
C) Ascorbic Acid D) Lactic Acid
 
Answer & Explanation Answer: D) Lactic Acid

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Q:

Which of the following elements has the lowest melting point?

A) Oxygen B) Platinum
C) Sodium D) Tin
 
Answer & Explanation Answer: A) Oxygen

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Q:

Which of the following gases is not generated in a biogas plant?

A) H2S B) CO2
C) CH4 D) CO
 
Answer & Explanation Answer: D) CO

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Q:

Tooth decay starts when the pH of the mouth is lower than

A) 5.7 B) 5.5
C) 5.6 D) 5.4
 
Answer & Explanation Answer: B) 5.5

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Q:

Bauxite is used as raw material by which industry

A) Aluminium B) Iron
C) Steel D) Gold
 
Answer & Explanation Answer: A) Aluminium

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Q:

The most pure form of carbon among the options is

A) Anthracite B) Lampblack
C) Graphite D) Wood Charcoal
 
Answer & Explanation Answer: A) Anthracite

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Q:

Which of the following elements has the lowest melting point?

A) Xenon B) Iodine
C) Barium D) Magnesium
 
Answer & Explanation Answer: A) Xenon

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Q:

Which chemical is present in the cells of cork of tree which makes them impervious to gases and water

A) Cellulose B) Suberin
C) Pectin D) Lignin
 
Answer & Explanation Answer: B) Suberin

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