Permanent hardness of water is due to the presence of __________...? Mcqs

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Permanent hardness of water is due to the presence of __________...?

(A) Sodium bicarbonate
(B) Calcium sulfate

(C) Calcium bicarbonate
(D) None of these

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Who discovered the Solar system ...?

(A) Copernicus
(B) Newton

(C) Galileo
(D) Kepler

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Stratosphere is the atmospheric layer that absorbs most of __________ that Earth receives from the Sun....?

(A) Infrared radiation
(B) Ultraviolet radiation

(C) Ozone layer
(D) Radio waves

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The most abundant constituent in Air is ______...?

(A) Hydrogen
(B) Oxygen

(C) Nitrogen
(D) Carbon Dioxide

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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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Periods in the periodic table are ____...?

(A) Vertical columns
(B) Horizontal rows

(C) Diagonal lines
(D) Blocks

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A radioactive nuclide emits a β-particle. The atomic number (proton number) of the nucleus number of ______...?

(A) Stays the same
(B) Decreases by 2

(C) Increases by 1
(D) Decreases by 4

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The comparison of two values is called _____...?

(A) Ratio
(B) Proportion

(C) Graph
(D) Table

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The movement of any solvent across a semipermeable membrane is called__________...?

(A) Osmosis
(B) Cataphoresis

(C) Electrolysis
(D) Electrophoresis

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Trypsin is an enzyme which digests protein produced by_____________...?

(A) Liver
(B) Pancreas

(C) Stomach
(D) Small intestine

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