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

1. The wavelength of visible light is:

2. 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?

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

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

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

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

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

8. The weight of a single atom of oxygen is:

9. The weight of one molecule of a compound of molecular formula C₆₀H₁₂₂ is:

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

11. A gas occupies a volume of 300 cc at 27°C and 620 mm pressure. The volume of gas at 47°C and 640 mm pressure is:

12. The weight of NaC1 decomposed by 4.9g of H₂SO₄, if 6 g of sodium hydrogen sulphate and 1.825 g of HC1, were produced in the reaction is:

13. 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: 

14. During electrolysis of water the volume of O₂ liberated is 2.24 dm³. The volume of hydrogen liberated, under same conditions will be

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