When water freezes at 0°C its density decreases due to_______________?

Related Mcqs:

1. The spreading of fragrance or scent in air is due to_______________?

   A. Diffusion
   B. Effusion
   C. Attraction with air
   D. Low dsensity

2. Best position of hydrogen in the periodic table is above I.A Group which is mainly due to_______________?

   A. Both are electropositive
   B. Similar outer most shell electronic configuration
   C. Both form ionic compounds
   D. All

3. Ketones are comparatively less reactive than aldehdye. It is due to_______________?

   A. alkyl groups are electron donating
   B. steric hindrance
   C. Both A and B
   D. none

4. Second ionization potential of alkali metals are very high due to_______________?

   A. being s-block elements
   B. inert gas configurations
   C. ns1 electronic configuration
   D. being metals

5. Water has maximum density at __________________?

   A. 0°C
   B. 2°C
   C. 4°C
   D. 100°C

6. The density of water may be__________________?

   A. Equal to that of ice
   B. Greater than that of ice
   C. Less than that of ice
   D. All are possible

7. At constant temperature the pressure of an ideal gas is doubled its density becomes_______________?

   A. Half
   B. Double
   C. Same
   D. None

8. Which law states that the rate of the effusion of a gas is inversely proportional to the square root of its density?

   A. Graham’s Law
   B. Gay-Lussac’s law
   C. Boyle’s law
   D. None of these

   Submitted by: Malik Asghar Hussain

9. The atomic radii decreases by increasing atomic number in________________?

   A. Alkali metal
   B. Alkaline earth metal
   C. Elements from Li to Ne
   D. Halogens

10. The property which increases upto group IV-A then decreases on wards_______________?

    A. Ionization energy
    B. Atomic radii
    C. Melting & boiling points
    D. Atomic volume