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 Chemistry Questions

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Q:

Which of the following is an element

A) alumina B) brass
C) graphite D) silicon
 
Answer & Explanation Answer: D) silicon

Explanation:
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Q:

The Gas used for Artificial Ripening of Green Fruit is

A) Acetone B) Di Carbonate
C) Ethylene D) Ethyl Alcohol
 
Answer & Explanation Answer: C) Ethylene

Explanation:

Ethylene is used for Artificial Ripening of Green Fruit.

    • Calcium carbide is also used in some countries for artificially ripening fruit. When calcium carbide comes in contact with moisture, it produces acetylene gas, which is quite similar in its effects to the natural ripening agent, ethylene

 

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Q:

Recycled plant matter is known as ?

A) Decomposed B) Carbide
C) Compost D) None
 
Answer & Explanation Answer: C) Compost

Explanation:
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Q:

Metal present in chocolate wrappers is

A) Aluminium B) Haemoglobin
C) Chalk D) Chlorophyll
 
Answer & Explanation Answer: A) Aluminium

Explanation:

Metal Aluminium is present in chocolate wrappers.

metal_present_in_chocolate_wrappers1543390493.jpg image

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Q:

Milk is a 

A) mixture B) element
C) metal D) None of these
 
Answer & Explanation Answer: A) mixture

Explanation:
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Q:

Gases used in normal welding?

A) Oxygen and Acetylene B) Acetylene and Nitrogen
C) Oxygen, Hydrogen and Acetylene D) Oxygen and Hydrogen
 
Answer & Explanation Answer: A) Oxygen and Acetylene

Explanation:

Normal Gas welding use oxygen-acetylene.

 

Depending on what materials you are welding, there are some more options that might be used.

For example - MIG/TIG use Argon, MAG use an argon-something mix.

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Q:

The compound MgCl2 is named

A) Magnesium Chloride B) Magnesium Chlorine
C) Magnesium Dichloride D) Dimagnesium Chloride
 
Answer & Explanation Answer: A) Magnesium Chloride

Explanation:

The compound MgCl2 is named as Magnesium Chloride.

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Q:

Harmful bacteria in drinking water cannot be destroyed by 

A) Chlorination B) boiling
C) adding caustic soda D) ozonisation
 
Answer & Explanation Answer: C) adding caustic soda

Explanation:

Water containing caustic soda cannot be used for drinking

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