Permanent hardness of water can be removed by adding __________...? Mcqs

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Permanent hardness of water can be removed by adding __________...?

(A) Chlorine
(B) Washing soda

(C) Bleaching powder
(D) None of these

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Anti Diuretic hormone (ADH) is secreted by...?

(A) Pituitary gland
(B) Pancreas

(C) Thyroid
(D) Parathyroid

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Which Gas is used in the preparation of Soft drinks...?

(A) Oxygen
(B) Carbon dioxide

(C) Nitrogen
(D) Halogen

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A transformer works on the principle of _______________...?

(A) Self induction
(B) Mutual induction

(C) Generator
(D) Inverter

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The cooling fins at the back of refrigerator are made of black and rough surface because ____...?

(A) They are good conductors of heat
(B) They are good radiators of heat

(C) They are good insulators of heat
(D) They are not important for heat transfer

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Which element is called earth maker...?

(A) Oxygen
(B) Silicon

(C) Carbon
(D) Hydrogen

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Huge cloud of gass and dust in the universe is called...?

(A) Constellation
(B) Satellite

(C) Meteorite
(D) Nebula

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Name the material of screen which used in Rutherford atomic model...?

(A) Aluminum foil
(B) Zinc sulphide

(C) Sodium sulphide
(D) Aluminum sulphide

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Who is Considered as Father of Botany...?

(A) Aristotle
(B) Gregor Joghn Mandle

(C) Theophrastus
(D) Corlous Linnaeous

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In NaCl crystal lattice each Na ion is surrounded by ______...?

(A) 6 Cl^- ions
(B) 6 Na^+ ions

(C) 8 Cl^- ions
(D) 12 Cl^- ions

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