When an acid reacts with a metal, which one of the following gas is usually liberated...? Mcqs

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When an acid reacts with a metal, which one of the following gas is usually liberated...?

(A) Ammonia Gas
(B) Chlorine

(C) Oxygen
(D) Hydrogen gas

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Constellations referred to as zodiac, are__________...?

(A) Imaginary regions that encompass the path of the planets
(B) Signs of Roman gods

(C) A group of stars
(D) None of these

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Segmented Worms take breath through:_________...?

(A) Mouth
(B) Nose

(C) Moist Skin
(D) Head

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Root hairs are most important to a plant because they ______...?

(A) Store starch
(B) Contain xylem tissues

(C) Provide a habitat for nitrogen fixing bacteria
(D) Increase the surface area for absorption

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Metals are good conductors of electricity because they have free _____...?

(A) Electrons
(B) Protons

(C) Neutrons
(D) Photons

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In Fishes excretory Product is__________...?

(A) Nitrogen
(B) Ammonia

(C) Uria
(D) Carbon dioxide

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Permanent hardness of water can be removed by adding __________...?

(A) Chlorine
(B) Washing soda

(C) Bleaching powder
(D) None of these

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The time period of a pendulum when taken to the Moon would...?

(A) remain the same
(B) decrease

(C) become zero
(D) increase

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What is the first element in the periodic table...?

(A) Hydrogen
(B) Helium

(C) Nitrogen
(D) Carbon

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Toy age refers to __________...?

(A) Early childhood
(B) Late childhood

(C) Baby hood
(D) All of Above

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