Very small time intervals are accurately measured by the___________...? Mcqs

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Very small time intervals are accurately measured by the___________...?

(A) Pabsars
(B) White dwarfs

(C) Atomic Clocks
(D) None of these

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Which of the following cannot be stored in glass bottle...?

(A) Aqua regia
(B) HF

(C) HCL
(D) HBr

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The intensity of earthquake is measured by ____...?

(A) Beaufort scale
(B) Richter scale

(C) Mohs scale
(D) None of these

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NASA’s ________ rover landed on Mars in February 2021....?

(A) Persistence
(B) Desistance

(C) Perseverance
(D) None of the above

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Which animal has four hearts...?

(A) Squid
(B) Octopus

(C) Cuttlefish
(D) Hagfish

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The height of the troposphere varies between ____________....?

(A) 7 km at equator and 17 km at poles
(B) 17 km at equator and 7 km at poles

(C) 18 km at equator and 8 km at poles
(D) 8 km at equator and 18 km at poles

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Hygrometer is used for measuring the ______...?

(A) Humidity of air
(B) Speed of sound

(C) Density of milk
(D) Specific gravity of liquids

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Metals are good conductors of electricity because they have free _____...?

(A) Electrons
(B) Protons

(C) Neutrons
(D) Photons

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How many lenses are present in refracting telescope...?

(A) Five lenses
(B) Three lenses

(C) Four lenses
(D) Two lenses

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What is the chemical formula of Ozone...?

(A) H2O
(B) C12

(C) O3
(D) CH4

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