Everyday Science MCQs

5120 MCQs  (Page 256 of 512)

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What is the molecular weight of Ammonia (NH3) ________ ?
A. 17.031 g/mol
B. 18.031 g/mol
C. 19.031 g/mol
D. 27.033 g/mol
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Which law states that the rate of the effusion of a gas is inversely proportional to the square root of its density?
A. Graham’s law
B. Gay-lussac’s law
C. Boyle’s law
D. None of these
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The valency of carbon Atom is __________ ?
A. 1
B. 2
C. 3
D. 4
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Permanent hardness of water due to sulphate of metals can be destroyed by the use of ________ ?
A. Zeolites
B. Sulphonides
C. Lime
D. Nitrates
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Which of the following noble gases is not present in atmosphere?
A. Argon
B. Helium
C. Radon
D. Xenon
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Which of the following noble gases is abundant in air?
A. Neon
B. Helium
C. Argon
D. Methane
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Which law states that “equal volumes of all gases, at the same temperature and pressure, have the same number of molecules?
A. Boyle’s law
B. Charles’ law
C. Gay-lussac’s law
D. Avogadro’s law
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Which law states that the volume of a given amount of gas held at constant pressure is directly proportional to the Kelvin temperature?
A. Charles’ law
B. Avogadro’s law
C. Graham’s law
D. Boyle’s law
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The easy way of balancing the chemical equation is_________?
A. According to atom’s atomic number.
B. According to atom’s atomic mass.
C. First we balance metal than non-metal than hydrogen than oxygen.
D. None of the above
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Which one of the following is also known as lactic acid ?
A. 3-hydroxy propanoic acid
B. 2-hydroxy propanoic acid
C. 2-hydroxy butanoic acid
D. 3-hydroxy butanoic acid
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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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