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Science MCQ Questions with answers

Here Important Science MCQ questions are added which are frequently asked in almost all the examinations. You can check the correct answer of any question on clicking the show answer button or on option itself. The Correct answer will be displayed below. You can share any question with your friends on whatsapp by tapping whatsapp button.

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Learn Science MCQs [Page 1 of Department 3]

1) Which one of the following is the major constituent of biogas 

(A) Co2
(B) Ch4
(C) O2
(D) Non of these
Correct Answer - Option (B)

Explanation:
B Methane is the major constituent of biogas. Chemical formula of methane is CH4. So option B is correct.

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2) An Antigen is

(A) The result of Antibody
(B) The opposite of antibody
(C) The stimulus for antibody formation
(D) The residue of an Antibody
Correct Answer - Option (C)

No Explanation found. Add Explanation and get +2 points.

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3) The estimate of pH in lemon juice is

(A) Less then 7
(B) Equal to 7
(C) Estimation is not Right
(D) More then 7
Correct Answer - Option (A)

No Explanation found. Add Explanation and get +2 points.

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4) Which one among the following is not correct about down's syndrome? 

(A) It is genetic disorder
(B) Effector individual has early ageing
(C) Affected person has mental retardation
(D) Affected person has furrowed tongue with open mouth
Correct Answer - Option (B)

No Explanation found. Add Explanation and get +2 points.

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5) Which one of the following chemicals is commonly used by farmers to destroy weeds? 

(A) DDT
(B) Malathion
(C) Methyl Bromide
(D) None of above
Correct Answer - Option (C)

No Explanation found. Add Explanation and get +2 points.

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6) Hair of a shaving brush cling together when the brush is removed from water due to

(A) Viscosity
(B) Surface tension
(C) Friction
(D) Elasticity
Correct Answer - Option (B)

No Explanation found. Add Explanation and get +2 points.

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7) Which one of the following is considered as a cell within a cell?

(A) Ribosome
(B) Chloroplast
(C) Lysosome
(D) Golgi apparatus
Correct Answer - Option (B)

No Explanation found. Add Explanation and get +2 points.

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8) Which organelles in the cell, other than nucleus contains DNA?

(A) Centriole
(B) Golgi apparatus
(C) Lysosomes
(D) Mitochondria
Correct Answer - Option (D)

No Explanation found. Add Explanation and get +2 points.

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9) Exposure to sunlight helps a person improve his health because:

(A) the infrared light kills bacteria in the body
(B) resistance power increases
(C) the pigment cells in the skin get stimulated and produce a healthy tan
(D) the ultraviolet rays convert skin oil into Vitamin D
Correct Answer - Option (D)

No Explanation found. Add Explanation and get +2 points.

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10) Which one of the following was the first mineral acid discovered 

(A) Hcl
(B) H2so4
(C) Nitric acid
(D) Non of these
Correct Answer - Option (B)

No Explanation found. Add Explanation and get +2 points.

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