The total number of atoms in 8.5 gm of NH3 is _______________ × 1023?

Related Mcqs:

1. Enthalpy of formation of NH3 is – 46 kJ/kg mole. The enthalpy change for the gaseous reaction, 2NH3 → N2 + 3H2, is equal to _____________ kJ/kg. mole?

   A. 46
   B. 92
   C. -23
   D. -92

2. A gaseous mixture contains 14 kg of N2, 16 kg of O2 and 17 kg of NH3. The mole fraction of oxygen is__________________?

   A. 0.16
   B. 0.33
   C. 0.66
   D. 0.47

3. Degree of freedom of a system consisting of a gaseous mixture of H2 and NH3 will be_________________?

   A. 0
   B. 1
   C. 2
   D. 3

4. In the ammonia synthesis reaction, N2 + 3H2 ⇌ 2NH3 + 22.4 kcal, the formation of NH3 will be favoured by___________________?

   A. High temperature
   B. Low pressure
   C. Low temperature only
   D. Both low temperature and high pressure

5. Atoms of the same element, but of different masses are called__________________?

   A. Isobars
   B. Isotones
   C. Isotopes
   D. None of these

6. Isotopes are atoms having the same _____________________?

   A. Mass number
   B. Number of neutrons
   C. Atomic mass
   D. None of these

7. In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just like in liquid. Which of the following is an amorphous material ?

   A. Tin
   B. Lead
   C. Zinc
   D. Glass

8. There are one octahedral void and ______________ tetrahedral void in the closest packing of atoms ?

   A. One
   B. Two
   C. Three
   D. None of these

9. Neutrons are present in all atoms except that of ___________________?

   A. He
   B. C
   C. H
   D. Ar

10. The number of atoms of oxygen present in 11.2 litres of ozone (O3) at N.T.P. are__________________?

    A. 3.01 × 1022
    B. 6.02 × 1023
    C. 9.03 × 1024
    D. 1.20 × 1024