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 Chemistry Questions

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Q:

Curd contains mainly ___ acid.

A) Benzoic B) Fumaric
C) Lactic D) Malic
 
Answer & Explanation Answer: C) Lactic

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Q:

Saturated Hydrocarbons are called

A) alkynes B) isomers
C) alkanes D) alkenes
 
Answer & Explanation Answer: C) alkanes

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Q:

Which of the following statements is Incorrect?

A) Atomic size increases from top to bottom B) All the elements of a group have same valency
C) Isotopes of the same elements are placed in the same group D) Atomic radius generally decreases from left to right
 
Answer & Explanation Answer: C) Isotopes of the same elements are placed in the same group

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Q:

An element has an atomic weight of W and an atomic number of N. The number of protons in the nucleus of its atom is

 

A) N B) W
C) W + N D) W - N
 
Answer & Explanation Answer: A) N

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Q:

What is the number of atoms constituting a molecule known as?

A) Atomicity B) Atomic mass
C) Atomic number D) Isotopes
 
Answer & Explanation Answer: A) Atomicity

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Q:

For dilution of a concentrated acid, we should add:

A) water into the diluted acid B) water into the concentrated acid
C) first water into the acid and then more acid into the water D) concentrated acid into water
 
Answer & Explanation Answer: B) water into the concentrated acid

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Q:

By how many atomic mass units do subsequent members of homologous series differ?

A) 26 B) 32
C) 20 D) 14
 
Answer & Explanation Answer: D) 14

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Q:

___ is one of the states of matter obtained by cooling a gas of very low density to extremely low temperatures.

A) Gas B) Plasma
C) Bose-Einstein Condensate (BEC) D) Plasma Condensate
 
Answer & Explanation Answer: C) Bose-Einstein Condensate (BEC)

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