Which is a water purification technology that uses a semipermeable membrane to remove ions, molecules and larger particles from drinking water...? Mcqs

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Which is a water purification technology that uses a semipermeable membrane to remove ions, molecules and larger particles from drinking water...?

(A) Filtration
(B) Reverse Osmosis (RO)

(C) Sedimentation
(D) Distillation

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The hard, solid rocks, whose composition or texture has been changed by heat or pressure in the Earth are called____________...?

(A) Sedimentary rocks
(B) Metamorphic rocks

(C) Igneous rocks
(D) All of the above

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According to many, including the Guinness Book of World Record,________is the world’s rarest mineral...?

(A) Painite
(B) Benitoite

(C) Jadeite
(D) Taaffeite

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GPS (Global Positioning System) is used for _____...?

(A) Space exploration
(B) Mapping

(C) Identify location of objects on Earth
(D) Provide weather forecasting

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Animals which are at the risk of extinction in future called...?

(A) Vulnerable
(B) Extinct

(C) Threatened
(D) Endangered

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Dielectric constant of water is...?

(A) 60
(B) 70

(C) 80
(D) None of these

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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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The volume of air remaining in the lungs even after forcible expiration is:...?

(A) total volume
(B) tidal volume

(C) residual volume
(D) none of the above

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The melting point of Ice on Fahrenheit Scale is taken as _____...?

(A) 32°F
(B) 0°F

(C) 212°F
(D) None of these

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An egg sinks in soft water but floats in a concentrated solution of salt because...?

(A) egg absorbs salt from the solution and expands
(B) albumin dissolves in salt solution and egg becomes lighter

(C) the density of salt solution exceeds the density of eggs
(D) water has high surface tension

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