Atomic ______________ of an element is a whole number?

Related Mcqs:

1. What is the simplest formula of a compound containing 50% of element A (atomic weight = 10) and 50% of element B (atomic weight = 20) ?

   A. AB3
   B. A2B3
   C. A2B
   D. AB2

2. Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same___________________?

   A. Period increases
   B. Period decreases
   C. Group increases
   D. Both ‘B’ & ‘C’

3. 6 gms of magnesium (atomic weight = 24), reacts with excess of an acid, the amount of H2 produced will be ______________ gm?

   A. 0.5
   B. 1
   C. 3
   D. 5

4. The atomic heat capacities of all solid elements ______________ with decrease in temperature?

   A. Increases
   B. Decreases
   C. Remains unchanged
   D. Approach zero at 0°C

5. The atomic weight of helium is 4 times that of hydrogen. Its diffusion rate as compared to hydrogen will be _____________ times?

   A. 1/2
   B. 4
   C. √2
   D. 1/4

6. 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

7. If 1.5 moles of oxygen combines with aluminium to form Al2O3, then the weight of aluminium (atomic weight = 27) used in this reaction is __________ gm?

   A. 27
   B. 54
   C. 5.4
   D. 2.7

8. In the reaction, Ca + 2H2O = Ca(OH)2 + H2; what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water ? (Atomic weight of calcium = 40) ?

   A. 4480
   B. 2240
   C. 1120
   D. 0.4

9. The amount of Zn (atomic weight = 65) required to form 224 c.c. of H2 at N.T.P. on treatment with dilute H2SO4will be _____________ gm?

   A. 0.065
   B. 0.65
   C. 6.5
   D. 65

10. With increase in temperature, the atomic heat capacities of all solid elements_________________?

    A. Increases
    B. Decreases
    C. Remains unchanged
    D. Decreases linearly