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 Chemistry Questions

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Q:

Alkali metals can

A) be highly unstable at room temperature B) vaporize at room temperature
C) easily gain electrons D) easily lose electrons
 
Answer & Explanation Answer: D) easily lose electrons

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Q:

A change in which one or more new substances are formed is called _________.

A) Physical Change B) Chemical Change
C) Rusting D) Galvanisation
 
Answer & Explanation Answer: B) Chemical Change

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Q:

Which of the following elements is used for vulcanizing rubber?

A) Sulphur B) Chlorine
C) Bromine D) Phosphorus
 
Answer & Explanation Answer: A) Sulphur

Explanation:

Vulcanization of rubber is a process of improvement of the rubber elasticity and strength by heating it in the presence of sulfur rubber much stronger, more flexible, and more resistant to heat and other environmental conditions.

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Q:

Which among the following is an endothermic reaction?

A) Respiration B) Combustion
C) Sweating D) Burning of natural gas
 
Answer & Explanation Answer: C) Sweating

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Q:

Uranium found in Ladakh is an example of which type of resource?

A) unnatural resources B) Actual resources
C) Potential resources D) Biotic resources
 
Answer & Explanation Answer: C) Potential resources

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Q:

In which of the following MgCl2 is soluble?

A) Petrol B) Acetone
C) Kerosene D) Water
 
Answer & Explanation Answer: D) Water

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Q:

Which among the following is an example of solid sol?

A) Milk of magnesia B) Foam
C) Coloured gemstones D) Rubber
 
Answer & Explanation Answer: C) Coloured gemstones

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Q:

Non metal found in liquid state?

A) Chlorine B) Bromine
C) Fluorine D) Iodine
 
Answer & Explanation Answer: B) Bromine

Explanation:

Bromine is the Non metal found in liquid state.

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