Home
Class 12
CHEMISTRY
Assertion : During calcination, the ore ...

Assertion : During calcination, the ore is heated well below its melting point in the limited supply of oxygen.
Reason: The process of calcination is carried out for sulphide ores. (1) If both (A) and (R) are correct and (R) is the correct explanation of(A). (2) If both (A) and (R) are correct, but (R) is not the correct explanation of (A). (3) If (A) is correct, but (R) is incorrect. (4) If both (A) and (R) are incorrect.

A

If both (A) and (R) are correct and (R) is the correct explanation of(A).

B

If both (A) and (R) are correct, but (R) is not the correct explanation of (A).

C

If (A) is correct, but (R) is incorrect.

D

If both (A) and (R) are incorrect.

Text Solution

Verified by Experts

The correct Answer is:
C

Heating of the ore below its melting point, in limited supply of oxygen, ensures removal of volatile impurities, water from hydrated ore, `CO_2` from carbonate ore.
Promotional Banner

Similar Questions

Explore conceptually related problems

Assertion : Limiting line in the Balmer series has a wavelength of 364.4 mm. Reason : Limiting line is obtained for a jump of electron from n= oo : If both (A) and (R) are correct and (R) is the correct explanation of(A)., If both (A) and (R) are correçt, but (R) is not the correct explanation of (A)., If (A) is correct, but (R) is incorrect., If both (A) and (R) are incorrect.

Assertion : Iodine is more soluble in CCI_4 than in water. Reason : Non-polar solutes are more soluble in non-polar solvents. a)If both (A) and (R) are correct and (R) is the correct explanation of(A). b)If both (A) and (R) are correct, but (R) is not the correct explanation of (A). c)If (A) is correct, but (R) is incorrect. d)If both (A) and (R) are incorrect.

Assertion : The elevation in boiling point fortwo isotonic solutions may not be same. Reason : The boiling point depends upon the concentration of the solute. a)If both (A) and (R) are correct and (R) is the correct explanation of(A). b)If both (A) and (R) are correct, but (R) is not the correct explanation of (A). c)If (A) is correct, but (R) is incorrect. d)If both (A) and (R) are incorrect.

Assertion : Sodium chloride is used to clear snow on the roads. Reason : Sodium chloride depresses the freezing point of water. a)If both (A) and (R) are correct and (R) is the correct explanation of(A). b)If both (A) and (R) are correct, but (R) is not the correct explanation of (A). c)If (A) is correct, but (R) is incorrect. d)If both (A) and (R) are incorrect.

Assertion : The free gaseous Cr atom has six unpaired electrons. Reason : Half-filled s-orbital has greater stability. : If both (A) and (R) are correct and (R) is the correct explanation of(A)., If both (A) and (R) are correçt, but (R) is not the correct explanation of (A)., If (A) is correct, but (R) is incorrect., If both (A) and (R) are incorrect.

Assertion : Larges the value of cryoscopic constant of the solvent lesser will be the freezing point of the solution Reason : Depression in the freezing point depends on the nature of the solvent. a)If both (A) and (R) are correct and (R) is the correct explanation of(A). b)If both (A) and (R) are correct, but (R) is not the correct explanation of (A). c)If (A) is correct, but (R) is incorrect. d)If both (A) and (R) are incorrect.

Assertion : Hydrogen has one electron in its orbit but it produces several spectral lines. Reason : There are many excited energy levels available. If both (A) and (R) are correct and (R) is the correct explanation of(A)., If both (A) and (R) are correçt, but (R) is not the correct explanation of (A)., If (A) is correct, but (R) is incorrect., If both (A) and (R) are incorrect.