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 Chemistry Questions

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Q:

Isotopes of the atoms of same element have

A) same number of neutrons B) same number of protons
C) same atomic mass D) different chemical properties
 
Answer & Explanation Answer: B) same number of protons

Explanation:
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Q:

Alcohol is a stimulant. true or false

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

Alcohol is a drug.

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Subject: Chemistry
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Q:

The enzyme in whosepresence glucose and fructose are converted into alcohol is 

A) Diastase B) Maltase
C) Invertase D) Zymase
 
Answer & Explanation Answer: D) Zymase

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Q:

What does 'M' stand for in chemistry?

Answer

'M' is used as a unit of molarity and stands for mole per litre i.e, number of moles of solute per liter of solution.

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Q:

Which is the heaviest metal among the following?

A) Gold B) Silver
C) Iron D) Copper
 
Answer & Explanation Answer: A) Gold

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Q:

Gamma rays are

A) high energy electrons B) low energy electrons
C) high energy electromagnetic D) high energy positrons waves
 
Answer & Explanation Answer: C) high energy electromagnetic

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Q:

Which of the following mixtures is not a colloid?

A) Sugar water B) Milk
C) Paint D) Fog
 
Answer & Explanation Answer: A) Sugar water

Explanation:

Colloids include gels, sols, and emulsions; the particles do not settle, and cannot be separated out by ordinary filtering or centrifuging like those in a suspension.

These Colloid substances consists of ultramicroscopic particles of one substance dispersed through another substance from which we cannot separate them.

 

Sugar water is not a colloid and it is a solution in which we can separate them.

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1 3081
Q:

Atoms Are Composed Of

A) Electrons and Protons B) Protons and Nuclei
C) Only Electrons D) Electrons and Nuclei
 
Answer & Explanation Answer: D) Electrons and Nuclei

Explanation:

Atoms are composed of Electrons, protons and Neutrons. Protons and Neutrons together called as Nuclei.

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