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




41.The number of electrons in one mole of H2 is:
A. 6.02 x 1023
B. 3.01 x 1023
C. 12.04 x 1023
D. Indefinite

42.CO+ is an example of:
A. Free radical
B. Cationic molecular ion
C. Anionic molecular ion
D. Stable molecule

43.Relative atomic mass is the mass of an atom of an element as compared to the mass of one atom of:
A. Oxygen
B. Hydrogen
C. Nitrogen
D. Carbon

44.Percentage of oxygen in H2O is:
A. 80%
B. 88.80%
C. 8.80%
D. 9.80%

45.Large no of isotopes are known for the elements whose masses are multiple of:
A. Two
B. Four
C. Six
D. Eight

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