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

Related Mcqs:

1. A sample of an iron and oxygen ore has a mass of 35.8 grams. The iron in the compound has a mass of 27.9 grams. What is the percent iron in the ore?

   A. 74% Fe
   B. 75% Fe
   C. 77% Fe
   D. 78% Fe

   Submitted by: Muhammad Ali Kunbhar

2. In which of the following type of reactions energy of reactant is greater than energy of product________________?

   A. endothermic
   B. exothermic
   C. unpredictable
   D. same

3. Which of the following reactions may be assoclated with aldehyde and ketone ?

   A. nucleophile addition
   B. polymerization
   C. oxidation
   D. all of the above

4. Which of the following do not give aldol condensation reactions ?

   A. formaldehyde
   B. acetaldehyde
   C. diemthyl ketone
   D. propionaldehyde

5. In a closed vessel, a gas is heated from 300K to 600 K. The kinetic energy becomes__________?

   A. Double
   B. Same
   C. Half
   D. Four times

   Submitted by: Muhammad Ali Kunbhar

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

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

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

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

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

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

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

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