Atoms, Molecules, Chemical Arithmatic and Volumetric Analysis Test Online MCQs

1. Volume of a gas at NTP is 1.12 x 10⁻⁷ cc. The number of molecule in it is:

2. The quantum number ‘m’ of a free gaseous atom is associated with:

3. 10²¹ molecules are removed from 200 mg of CO₂. The moles of CO₂ left are:

4. The oxide of an element contains 67.67% oxygen and the vapour density of its volatile chloride is 79. Equivalent weight of the element is: 

5. If e = 1.60206 x 10⁻¹⁹ C,   e/m = 1.75875 x 10¹¹ C kg⁻¹ then the mass of electron is

6. At a constant volume the specific heat of a gas is 0.075 and its molecular weight is 40. The gas is:

7. Azimuthal quantum number defines

8. The wavelength of a 150 g rubber ball moving with a velocity of 50 ms⁻¹ is:

9. Quantum numbers of an atom can be defined on the basis of

10. Which of the following does not have valence electron in 3d-subshell?

11. The de-Broglie wavelength associated with a particle of mass 10⁻⁶ kg moving with a velocity of 10 ms⁻¹ is:

12. The reaction of calcium with water is represented by the equation Ca + 2H₂O → Ca(OH)₂+ H₂ What volume of H₂ at STP would be liberated when 8 gm of calcium completely reacts with water?

13. Spectrum of Li²⁺ is similar to that of

14. 0.4 moles of HCI and 0.2 moles of CAC1₂ were dissolved in water to have 500 mL of solution, the polarity of C1⁻ ion is:

15. The normality of solution obtained by mixing 10 ml of N/5 HCI and 30 ml of N/10 HCI is: