Which salts are excessively dissolved to make temporary hard water...? Mcqs

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Which salts are excessively dissolved to make temporary hard water...?

(A) CaSO4 and CaCl2
(B) KNO3 and KOH

(C) CaCO3 and Ca(OH)2
(D) Ca(HCO3)2 and Mg(HCO3)2

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Which one of the following is not a radioactive element ...?

(A) Cadmium
(B) Thorium

(C) Radium
(D) Uranium

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How long does the earth take to cover 1° longitude...?

(A) 2 Minutes
(B) 3 Minutes

(C) 4 Minutes
(D) 5 Minutes

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Which mineral is involved in formation of a hormone that is required to produce energy...?

(A) Copper
(B) Magnesium

(C) Calcium
(D) Iodine

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Albatros is__________...?

(A) A sea bird
(B) A beetle

(C) A fruit
(D) None

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The Analytical Chemistry deals with instruments and methods to ______ identify and quantify the matter....?

(A) Mix
(B) Separate

(C) Differentiate
(D) Manipulate

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Enzymes are organic catalysts made up of __________...?

(A) Carbohydrates
(B) Proteins

(C) Nucleic Acid
(D) Fats

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Pascal’s Principle is widely used in a _____...?

(A) Electrical System
(B) Hydraulic System

(C) Pneumatic System
(D) Mechanical System

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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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The total energy of revolving electron in an atom_____________...?

(A) Will always be positive
(B) Can never be positive

(C) Can have any value above zero
(D) Cannot be negative

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