By which process copper is refined ____________...? Mcqs

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By which process copper is refined ____________...?

(A) Roasting
(B) Oxidation

(C) Zone Refining
(D) Electrolysis

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If you travel to the Moon your weight will change because:...?

(A) The pull of gravity is weaker there than on Earth
(B) The pull of gravity is stronger there than on Earth

(C) The pull of space is stronger than on earth
(D) The pull of Sun is bigger than on Earth

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The number of electrons of a neutral atom is automatically known if one knows the...?

(A) Atomic number
(B) Atomic weight

(C) Number of orbitals
(D) none

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Who invented Logarithm Tables...?

(A) John Napier
(B) John Doe

(C) John Harrison
(D) John Douglas

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Which of the following mixture of gases is required in gas welding...?

(A) Oxygen and ethylene
(B) Oxygen and hydrogen

(C) Acetylene and oxygen
(D) Acetylene and hydrogen

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How many hearts an Octopus has...?

(A) 10
(B) 8

(C) 5
(D) 3

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What are considered the building blocks of matter...?

(A) Molecules
(B) Protons

(C) Elements
(D) Atoms

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In which of the following is/are chlorophyll is present...?

(A) Algae
(B) Bacteria

(C) Animals
(D) Plants

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Which gas does a Photocopier machine produce...?

(A) Ozone
(B) carbon dioxide

(C) Sulfur dioxide
(D) None of these

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Isotopes of an element are identical in ____...?

(A) Mass number
(B) Electron number

(C) Valency
(D) Atomic number

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