Which are the only two elements on the periodic table that are liquid at room temperature...? Mcqs

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Which are the only two elements on the periodic table that are liquid at room temperature...?

(A) Mercury and Bromine
(B) Carbon and helium

(C) Nitrogen and Hydrogen
(D) Oxygen and Neon

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Recognize the factor which does not affect the process of respiration...?

(A) O2
(B) Temperature

(C) Light
(D) CO2

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Atoms that gain electron will become negatively charged ion and they are known as...?

(A) Ion
(B) Cation

(C) Isotope
(D) Anion

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T.V. transmission cannot cover a very large area because...?

(A) the strength of T.V. waves is very limited
(B) picture cannot be transmitted clearly after a specific distance

(C) the shape of the earth is spherical
(D) the air is not a good conductor of light and sound/waves

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Speed of any object can be changed by...?

(A) Time
(B) Force

(C) Distance
(D) Mass

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What is the distance of the star Proxima Centauri from the planet Earth ________...?

(A) 4.2 light years
(B) 3.2 light years

(C) 2.4 light years
(D) 1.5 light years

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Earthquakes are caused by:...?

(A) Landslide
(B) Eruption of volcanoes

(C) Tectonic plates
(D) All of these

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Which one of the following is a bio molecule...?

(A) Formic Acid
(B) Tartic Acid

(C) Glutamic Acid
(D) Glutaric Acid

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The speed of light in vacuum is about...?

(A) 300 Million meters per second
(B) 300 Million meters per hour

(C) 300 Million kilometers per second
(D) 300 Million kilometers per hour

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The comparison of two values is called _____...?

(A) Ratio
(B) Proportion

(C) Graph
(D) Table

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