Permanent hardness of water may be removed by the addition of___________...? Mcqs

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Permanent hardness of water may be removed by the addition of___________...?

(A) Sodium Carbonate
(B) Alum

(C) Potassium Permanganate
(D) Lime

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The beautiful color patterns exhibited by a peacock in its tail feathers are due to ...?

(A) Selective absorption of light
(B) Selective re ection of light

(C) Sinterference of light
(D) Natural colour pattern of feathers

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Saccharine is made up of __________...?

(A) Toluene
(B) Phenol

(C) Propane
(D) None of these

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The nearest Star to the planet earth is ________ ...?

(A) Regel
(B) Canopus

(C) Sun
(D) Betelgeuse

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How many latitude lines are there...?

(A) 90
(B) 180

(C) 270
(D) 360

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How much percentage (%) of the Earth's Surface is covered with water...?

(A) 70%
(B) 60%

(C) 90%
(D) 75%

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Which mineral is the present in meat, onion, eggs, iodized salt and seafood...?

(A) Calcium
(B) Iodine

(C) Magnesium
(D) Copper

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Approximate age of moon is _________...?

(A) 4.51 billion years
(B) 4.55 billion years

(C) 4.53 billion years
(D) 4.57 billion years

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The ability of the Eye to see in the dark, is due to the production of a purple pigment known as________...?

(A) Carotene
(B) Rhodopsin

(C) Iodopsin
(D) Retinene

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Which source contains the highest amount of iodine...?

(A) Milk
(B) Seaweed

(C) Eggs
(D) Fish

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