A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the ____________________?

Related Mcqs:

1. A butane isomerisation process produces 70 k.mole/hr of pure iso-butane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be_________________?

   A. 3 kmole/hr
   B. 4 kmole/hr
   C. 5 kmole/hr
   D. 6 kmole/hr

2. Under conditions of equal reduced pressure and equal reduced temperature, substances are said to be in the ‘corresponding states’. At equal reduced conditions i.e., at the corresponding state, the ____________ of different gases are nearly the same?

   A. Compressibility
   B. Molecular weight
   C. Humidity
   D. None of these

3. 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

4. Gases having same reduced temperatures and reduced pressures_________________?

   A. Deviate from ideal gas behaviour to the same degree
   B. Have nearly the same compressibility factor
   C. Both A. and B.
   D. Neither A. nor B.

5. pH value of a solution containing 1 gm of hydrogen ion per litre will be ____________________?

   A. 0
   B. 1
   C. 7
   D. 10

6. Pure oxide refractories are generally monocrystalline in nature and are self bonded ______________ bricks are generally used as moderator in nuclear reactors?

   A. Beryllia
   B. Carborundum
   C. Corundum
   D. Thoria

7. Refractories subjected to alternate cycles of heating & cooling are liable to loose their resistance to__________________?

   A. Thermal spalling
   B. Slag attack
   C. Fusion under load
   D. CO attack

8. _____________ kg of CaC03 on heating will give 56 kg of CaO?

   A. 56
   B. 100
   C. 144
   D. 1000

9. Sometimes, in chemical processes, a part of the outlet stream is rejected as waste in order to keep the impurity level in the system within limits. This phenomenon is termed as the_________________?

   A. Recycling
   B. Purging
   C. Bypassing
   D. Recirculation

10. A bypass stream in a chemical process is useful, because it___________________?

    A. Facilitates better control of the process
    B. Improves the conversion
    C. Increases the yield of products
    D. None of these