Preservatives are used to preserve _______...? Mcqs

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Preservatives are used to preserve _______...?

(A) Acids
(B) Bases

(C) Food
(D) Water

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The color of a sedimentary rock is often mostly determined by___________...?

(A) Zinc
(B) Iron

(C) Calcium
(D) None of these

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Chlorophyll contains _____metal....?

(A) Iron
(B) Calcium

(C) Magnesium
(D) Potassium

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Soap is prepared by boiling caustic soda with ___________...?

(A) Alcohol
(B) Kerosene oil

(C) Glycerine
(D) Fats

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A thick cloud of water droplets on the earth’s surface is called...?

(A) Dew
(B) Fog

(C) Frost
(D) Rain

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In Daniel cell ____ is used as cathode....?

(A) Zn
(B) Cu

(C) Sn
(D) Pb

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Which of the following is a rich source of Vitamin B-12...?

(A) Cashew nut
(B) Milk

(C) Apple
(D) Watermelon

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What is depression rate in pakistan...?

(A) 31
(B) 32

(C) 33
(D) 34

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Lock Jaw i.e. difficulty in opening the mouth, is a symptom of___________...?

(A) Chlorea
(B) Plague

(C) Diphtheira
(D) Tetanus

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Endothermic reactions are those in which ________....?

(A) Heat is evolved
(B) Heat is absorbed

(C) Temperature increases
(D) Light is produced

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