Boiling point of pure water is __________...? Mcqs

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Boiling point of pure water is __________...?

(A) 90’C
(B) 97’C

(C) 100’C
(D) None of these

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The prefix ‘hept’ stands for the ____ carbon atoms....?

(A) 2
(B) 5

(C) 7
(D) 9

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Which type of climates of world has dry summer & wet winter ...?

(A) Western European type
(B) Mediterranean type

(C) Equatorial type
(D) Tundra type

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The cracking sound heard when dry hair is combed with a hard rubber comb is due to_________...?

(A) The hair barging against the charged comb
(B) Small electric sparks

(C) The rubbing of the comb with the hair
(D) None of the above

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If nucleon number of potassium is 39, number of neutrons will be _______...?

(A) 39
(B) 19

(C) 20
(D) 29

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In the manufacture of Vanaspati Ghee/Banaspati Ghee which gas is used ...?

(A) Hydrogen
(B) Oxygen

(C) Nitrogen
(D) Carbon dioxide

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Which of the following is the reason of global warming...?

(A) Presence of sulphite
(B) Rise in CO2 concentration

(C) Oxides of nitrogen
(D) Formtion of ozone

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If force of 6N displaces an object 2m in the direction of force, then work done will be __________...?

(A) 0
(B) 12 Joule

(C) 3 Joule
(D) Both b and c

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Water has maximum density at____________...?

(A) 0°C
(B) 4°C

(C) 4° K
(D) 4.8°C

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Which part of the body is attacked by “Gingivitis” disease...?

(A) Eyes
(B) Nails

(C) Gums
(D) Nostrils

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