The melting points and boiling points upto meddle of 3d- series ____________________?

Related Mcqs:

1. Across short period the melting and boiling point increase upto __________________?

   A. IIIA group
   B. IVA group
   C. VA group
   D. VIA group

2. Melting points of VII-A group elements down the group ____________________?

   A. Increase
   B. Decrease
   C. Remain constant
   D. No regular trend

3. The molal boiling point constant is the ration of the elevation of boiling point to____________________?

   A. Molarity
   B. Molality
   C. More fraction of solvent
   D. Mole fraction of solute

4. Boiling points of hydrocarbons increase with the increase in number of carbon atoms. It is mainly due to_________________?

   A. More strength of H-bonding
   B. More strength of London forces
   C. Less polarizability
   D. All of the above

5. 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

6. Upto ___________________ C atoms alkanes are gases?

   A. 2
   B. 3
   C. 4
   D. 6

7. A substance having very high vapour pressure at its melting point on heating will show_______________?

   A. Melting
   B. Sublimation
   C. Decomposition
   D. Condensation

8. Which one of the followings possesses melting point below 0°C?

   A. Nitrogen
   B. Phosphorus
   C. Carbon
   D. Bismuth

9. In melting of iron, which of the following reactions takes place in Bladt Furnace at 400°C- 600°C________?

   A. CaO+ SiO2——> CaSiO3
   B. 2FeS+3O2——–> 2Fe+ SO2
   C. FeSiO3———> FeSiO3
   D. Fe2O3+ 3CO——–> 2Fe+ 3CO2

   Submitted by: Muhammad Ali Kunbhar

10. Which of the following aqueous solutions would have the highest boiling point?

    A. 0.20 m glucose
    B. 0.20 m NaCl
    C. 0.15 m CaCl2
    D. 0.25 m sucrose

    Submitted by: Muhammad Ali Kunbhar