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

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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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Permissible noise level at Residential area during night time is:...?

(A) 45 dB
(B) 55 dB

(C) 75 dB
(D) 80 dB

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Through which organ does a fish respire...?

(A) Nose
(B) Lungs

(C) Gills
(D) Fins

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Edward Genner discovered ‘vaccine’ in___________...?

(A) 1796
(B) 1978

(C) 1686
(D) 1933

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NASA’s Mars rover, __________ , has been exploring Mars since 2012....?

(A) Diversity
(B) Serenity

(C) Curiosity
(D) Divinity

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Dry ice is ___________...?

(A) Methane hydrate
(B) Liquid Nitrogen

(C) Solid Carbon dioxide
(D) Frozen Water

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Animal which captures and readily kills living animals for its food is called___________...?

(A) Parasite
(B) Scavenger

(C) Predator
(D) Mammal

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Ratio is comparison of _____ values....?

(A) One
(B) Two

(C) Three
(D) Four

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Ozone layer thickness is measured in____________...?

(A) Metre
(B) Joule

(C) Pounds
(D) Dobson

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Which of the following is called as Blue planet...?

(A) Mercury
(B) Earth

(C) Venus
(D) Neptune

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