Chapter-1 - 11th - Basic Concepts Preparation Multiple Questions and Answers.




6.The largest number of molecules are present in
A. 3.6 of H2O
B. 4.6 g of C2H5OH
C. 2.8 g of CO
D. 5.4 g of N2O5

7.I molar volume of a gas at S.T.P is occupied by
A. 1 g of gas
B. 6 x 1023g of gas
C. 22.4 m3of gas
D. 1 gram molecular mass of gas

8.What has a mass equal to that of one mole of water.
A. 22.4 dm3 of water
B. One mole of steam
C. One molecule of water
D. Two moles of hydrogen molecules and one mole of oxygen molecules.

9.The volume occupied by 1.4 g on N2at S.T.P is
A. 2.24 dm3
B. 22.4 dm3
C. 1.12 dm3
D. 112 cm3

10.Which of the following contains the same number of molecules as 9 g of water.
A. 2 g of hydrogen gas
B. 14 g of nitrogen gas
C. 32 g of oxygen gas
D. 44 g of carbon dioxide gas

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