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 Chemistry Questions

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Q:

Who was the first man to go to space?

A) Yuri Gagarin B) Yuri Rontgen
C) Yuris Cui D) Yuris Mahatinn
 
Answer & Explanation Answer: A) Yuri Gagarin

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Q:

The hazardous component in most antifreeze is

A) Ethane alcohol B) Ethylene Glycol
C) Ehtylene D) Ethene
 
Answer & Explanation Answer: B) Ethylene Glycol

Explanation:

Ethylene Glycol is an antifreeze is an additive which lowers the freezing point of a water-based liquid and increases its boiling point. 

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Q:

Which of the following is also used as a Bio fertilizer?

A) Urea B) Ammonia
C) Uric Acid D) Nitrates
 
Answer & Explanation Answer: B) Ammonia

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Q:

Which one of the following elements is essential for the formation of chlorophyll in green plants?

A) Calcium B) Iron
C) Magnesium D) Potassium
 
Answer & Explanation Answer: C) Magnesium

Explanation:

Forms taken up by plants: Mg++ Functions in plants: a part of the chlorophyll molecule -essential in photosynthesis: related to phosphorus metabolism: large quantities found in seed.Mg deficiency symptoms: Mg is mobile, so symptoms occur first in old leaves; A whitish or yellowish striping effect on grasses.

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Q:

The biogas used for cooking is a mixture of which of the following ?

A) Carbon dioxide & oxygen B) Isobutane & propane
C) Methane & carbon monoxide D) Methane & carbon dioxide
 
Answer & Explanation Answer: D) Methane & carbon dioxide

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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:

Of the following commonly used materials, the one that is not an alloy is

A) Steel B) Brass
C) Bronze D) Copper
 
Answer & Explanation Answer: D) Copper

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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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