Among the following, which substance is not a compound...? Mcqs

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Among the following, which substance is not a compound...?

(A) H2O
(B) Mg

(C) CO2
(D) NaCl

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The natural source of hydrocarbon is:___________...?

(A) Crude oil
(B) Biomass

(C) Coal
(D) Carbohydrates

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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 salinity of sea water is determined by the amount of common salt (Sodium Chloride) in __________ of sea water....?

(A) 1 gram
(B) 10 grams

(C) 1 kg
(D) 10 kg

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If an enclosed gas container with moveable piston is heated. What will happen...?

(A) Volume will be decreased
(B) Volume will remain constant

(C) Volume will be increased
(D) Pressure will be increased

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A substance which produces hydrogen ion (H+) in the aqueous solution is called...?

(A) Base
(B) Acid

(C) Oxidizing agent
(D) Reducing agent

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International date line passes through which strait...?

(A) Malacca Strait
(B) Adam Strait

(C) Bering Strait
(D) Java Strait

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A solar eclipse occurs when _________...?

(A) Venus between Earth and sun
(B) Moon is between Earth and sun

(C) Sun is between Earth and moon
(D) Moon is between Earth and Neptune

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Number of electrons lost by atoms of group IIIA equals ______...?

(A) 1
(B) 2

(C) 3
(D) 4

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A___is a stiff bar that rests on a support called a fulcrum which lifts or move loads....?

(A) Pulley
(B) Wedge

(C) Screw
(D) Lever

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