Air contains volume of carbon dioxide approximately...? Mcqs

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Air contains volume of carbon dioxide approximately...?

(A) 3%
(B) 33%

(C) 0.3%
(D) 0.03%

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What is bacteria that helps make yogurt ...?

(A) Escherichia Coli
(B) Staphylococcus aureus

(C) Lactobacillus
(D) All of these.

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The blotting paper helps observe liquid by__________...?

(A) Surface Action
(B) Capillary Action

(C) Viscosity
(D) Boldness

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A movable pulley is used as ______...?

(A) Speed multiplier
(B) Force multiplier

(C) Direction changer
(D) Load reducer

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Sun is divided into ______ main layers....?

(A) 2
(B) 3

(C) 4
(D) 5

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Which process allow movement in and out of cell...?

(A) Osmosis
(B) Diffusion

(C) Active transport
(D) All of these

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Newton's law of gravitation holds between every two objects on the _____...?

(A) On Earth
(B) On Jupiter

(C) On Moon
(D) On Universe

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The neutral atoms of all of the isotopes of the same element have _______...?

(A) Different numbers of protons
(B) Exact numbers of neutrons

(C) An exact number of protons
(D) An exact number of nucleons

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Involuntary muscles in a human body are present in__________...?

(A) Brain
(B) Tongue

(C) Digestive system
(D) Limbs

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All of the following statements are incorrect except:...?

(A) Precision and accuracy should go side by side in a scientific work
(B) Scientific work must be precise, accuracy is not essential

(C) Scientific work must be accurate, precision is not essential
(D) Calculations must be made before any experiment

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