Which of the following noble gases is abundant in air?
A. Neon B. Helium C. Argon D. Methane
Chemistry MCQs
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
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
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
The valency of carbon Atom is __________ ?
A. 1 B. 2 C. 3 D. 4 The valency of carbon is 4. As the atomic number of carbon is 6, it has a total of 6 electrons in one atom arranged in the following configuration. it needs to add 4 more electrons to the 2p sub-shell, or lose 4 electrons from the … Read more
What is the Chemical formula of Zinc Hydroxide _________ ?
A. Zn(OH)2 B. ZNO2 C. Zn2(OH)3 D. ZnOH
Permanent hardness of water due to sulphate of metals can be destroyed by the use of ________ ?
A. Zeolites B. Sulphonides C. Lime D. Nitrates
Which among the following is not a property of Ionic bond _________?
A. Sharing of electrons B. Transfer of electrons C. Losing of electrons D. Gain of electrons
Sum of protons and neutrons in an atom gives off _________ ?
A. Nucleon numbera B. Mass number C. Atomic number D. Both A and B
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