The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is ________ ...? Mcqs

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The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is ________ ...?

(A) Argon
(B) Xenon

(C) Helium
(D) Krypton

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which Planet is Called Earth’s Sister...?

(A) Mercury
(B) Venus

(C) Mars
(D) Neptune

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If steel is heated to a temperature well below red heat and is then cooled slowly, the process is called_________...?

(A) Annealing
(B) Quenching

(C) Tempering
(D) Nitriding

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Sequence of changes which occurs between one cell division and the next is called...?

(A) Mitosis
(B) Meiosis

(C) Half cycle
(D) Cell cycle

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A (an) ______ is a pure substance which contains only one type of molecule made up of atoms of more than one element....?

(A) Compound
(B) Element

(C) Molecule
(D) Atom

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Special type of movement of specific substances through carrier protein is _____...?

(A) Facilitated diffusion
(B) Active transport

(C) Passive transport
(D) Osmosis

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Yeasts feeds on sugar in the dough and produces ______ gas....?

(A) Oxygen
(B) Hydrogen

(C) Carbon dioxide
(D) Nitrogen

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Which isotope is used to investigate carbon uptake and biochemical pathways in plants...?

(A) Phosphorus - 32
(B) Carbon - 14

(C) Lead - 210
(D) Nitrogen - 15

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A fresh egg when placed in salt water will __________ ...?

(A) sink and go to the bottom
(B) sink but will not go to the bottom

(C) Float
(D) Burst

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Which is the most electro-negative element among the following _________...?

(A) Fluorine
(B) Bromine

(C) Sodium
(D) Oxygen

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