Everyday Science MCQs

5120 MCQs  (Page 217 of 512)

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Azimuthal quantum number defines___________?
A. E/m ratio of an electron
B. Spin of an electron
C. Angular momentum of an electron
D. Magnetic momentum of an electron
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The energy of one mole of photons of radiation, whose frequency is 4×10 14 Hz, is ___________?
A. 159.6kj
B. 135.5 kj
C. 110.5 kj
D. 80.4 kj
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Which of the following gases shows more ideal behaviour at 0°C___________?
A. H2
B. Ch4
C. He
D. Nh3
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In a closed vessel, a gas is heated from 300K to 600 K. The kinetic energy becomes__________?
A. Double
B. Same
C. Half
D. Four times
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Pressure remain constant, at which temperature the volume of gas becomes twice of what it is at 0°C?
A. 546 °c
B. 546 k
C. 200°c
D. 273 k
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The density of a gas is 1.964 g dm-3 at 273 K and 76 cm Hg. The gas is _________?
A. Ch4
B. Co2
C. C2h4
D. Xe
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Which of the following haloalkane is hydrolysed by SN1 mechanism?
A. Ch3br
B. Ch3ch2br
C. Ch3ch2ch2br
D. (ch3)3cbr
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Hydrocarbon is formed when Grignard reagent is treated with___________?
A. H2o
B. Ch3oh
C. Both a and b
D. None of the above
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Grignard reagent gives carboxylic acid with____________?
A. Co2
B. Ch3cho
C. Coc2
D. Hcn
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The law of traids is applicable to__________?
A. Li, be, b
B. F, cl, br
C. Cl, br, i
D. Na, k, rb
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Word of the Day
24 Jul
Untenable
(especially of a position or view) not able to be maintained or defended against attack or objection.
ناقابل مدافعت، غیر مستحکم، جو دلیل سے ثابت نہ ہو سکے

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