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

Related Mcqs:

1. Steam causes more sever burn than the boiling water because it possesses _________________?

   A. Latent heat of fusion
   B. Latent heat of vaporization
   C. Latent heat of sublimation
   D. All of the above

2. Which of the following possesses maximum hydration energy ?

   A. Na+
   B. K+
   C. Mg+2
   D. Ca+2

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

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

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

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

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

   A. increases
   B. decreases
   C. remain same
   D. no regular trend

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

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

7. 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

8. Which of the following elements conduct electricity and also melts below 100°C ?

   A. Aluminium
   B. Sodium
   C. Carbon
   D. Sulphur

9. If steel is heated to a temperature well below red heat and is then cooled slowly, the process is called_________?

   A. Annealing
   B. Quenching
   C. Tempering
   D. Nitriding

   Submitted by: Muhammad Ali Kunbhar

10. When sulphuric acid is treated with ethanol sulphuric acid behaves like________________?

    A. an acid
    B. a dehydrating agent
    C. an oxidizing agent
    D. as sulphonating agent