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 ________ system is the closest star system to our sun....?

(A) Promixa Centauri
(B) Alpha Centauri

(C) Red proxima Centauri
(D) None of these

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__________ is the point in solar system at which pressure from the solar wind is equal to the opposing pressure of the interstellar medium....?

(A) Seliopause
(B) Meliopause

(C) Heliopause
(D) Beliopause

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The study of the weather is called____________...?

(A) Meteorology
(B) Weatherology

(C) Ecology
(D) Geology

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Which has the lowest pH...?

(A) Hepatic Bile
(B) Gastric Juice

(C) Saliva
(D) Pancreatic Juice

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In context of environment, the term “dirty dozen” refers to _____...?

(A) 12 most harmful greenhouse gases
(B) 12 ozone depleting substances

(C) 12 persistent organic pollutants
(D) None of the above

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What is the main component of bones and teeth...?

(A) Calcium carbonate
(B) Calcium phosphate

(C) Calcium sulphate
(D) Calcium nitrate

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An extremely small piece of silicon on which integrated circuits are implicated is called __________________...?

(A) Card Reader
(B) Hollerith Code

(C) Feed
(D) Chip

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Mercury, Venus, Earth and Mars are called___________...?

(A) Dwarf Planet
(B) Gaseous Planets

(C) Terrestrial Planets
(D) Both A & B

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When the moon comes in front of the sun and blocks most of the sunlight from reaching the earth is known as...?

(A) A Solar Eclipse
(B) A Lunar Eclipse

(C) A Venus Eclipse
(D) A Earth Eclipse

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