Chemistry Questions

Q:

Which one is not the isotopes of hydrogen

A) Protium B) Deuter
C) Tritium D) All
 
Answer & Explanation Answer: C) Tritium

Explanation:
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Q:

Is deposition endothermic or exothermic?

A) Endothermic B) Exothermic
C) Both A & B D) Can't be determined
 
Answer & Explanation Answer: B) Exothermic

Explanation:

In thermodynamics, deposition is a phase transition in which gases are directly transformed to solids without converting to liquids first.

 

For example, watervapour is directly changed to ice without first becoming to liquid water. In this process, heat is released making the process exothermic process.

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Q:

What is the name for the compound P4O10?

A) Phospholipid B) Phosphoric acid
C) Phosphorus pentoxide D) Phosphorus decoxide
 
Answer & Explanation Answer: C) Phosphorus pentoxide

Explanation:

The compound with the molecular formula P4O10 is called Phosphorus pentoxide or tetraphosphorous decoxide. It is an anhydride of the Phosphoric acid.

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Q:

Energy transfer by convection is primarily restricted to

A) fluids B) solids
C) liquids D) gases
 
Answer & Explanation Answer: A) fluids

Explanation:

Convection is the mode of heat transfer which involves bulk motion of a fluid to transfer heat. Energy transfer by convection is primarily restricted to fluids. Fluids can be both liquids and gases.

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Q:

Which among the following minerals is also known as Horn Silver?

A) Silver Chroride B) Zinc Phosphate
C) Silver Iodide D) Silver Sulphide
 
Answer & Explanation Answer: A) Silver Chroride

Explanation:

Silver chloride is a chemical compound with the chemical formula AgCl is also called as Horn Silver. It is also called as cerargyrite. It is a gray, very heavy halide mineral and an ore of silver.

Which_among_the_following_minerals_is_also_known_as_Horn_Silver1560942904.jpg image

 

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Q:

Which of the following is a Decomposition Reaction?

A) 2HgO ----> 2Hg + O2 B) 6NaNO3 ----> 6NaNO2 + 3O2
C) ZnCO3 ----> ZnO + CO2 D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

All the given reactions are Decomposition reactions.

Decomposition reaction is a reaction in which only one reactant is splitted into two or more products.

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Q:

The atoms of the elements which have same number of neutrons are called

A) Isobars B) Isotopes
C) Isotones D) None
 
Answer & Explanation Answer: C) Isotones

Explanation:
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Q:

Shock resisting steels should have

A) toughness B) low wear resistance
C) low tensile strength D) low hardness
 
Answer & Explanation Answer: A) toughness

Explanation:

Shock resisting steels should have toughness.

S-5 is a silico-manganese shock resisting steel that offers good ductility.

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