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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The sun is _________times bigger than the Earth....?

(A) 105
(B) 107

(C) 109
(D) 111

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Bore is caused by______...?

(A) Rising tide while meeting river currents
(B) Friction from prevailing winds

(C) Spring tide and strong winds
(D) Unequal heating of oceans

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The Study of human beauty is called____________...?

(A) Oncology
(B) Agrostology

(C) Kalology
(D) Argology

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A force can change all of the following of an object except...?

(A) Direction
(B) Mass

(C) Size
(D) Speed

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The Boolean expression of an OR gate is ______...?

(A) A . B
(B) A + B

(C) A x B
(D) None of these

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How many chambers are in the human heart ...?

(A) 02
(B) 03

(C) 04
(D) 05

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____, days become longer and night become shorter....?

(A) Autumn
(B) Summer

(C) Winter
(D) Spring

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Which of the following are lightest form of matter...?

(A) Solid
(B) Liquid

(C) Gases
(D) Plasma

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Which one of the following is a non-metallic mineral...?

(A) Manganese
(B) Magnesium

(C) Gypsum
(D) Bauxite

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