Assertion : Aluminium is used for thermite welding.
Reason : Aluminium ores are concentrated by the method of chemical separation.

If both assertion and reason are CORRECT and reason is the CORRECT explanation of the assertion.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

If both assertion and reason are CORRECT, but reason is NOT THE CORRECT explanation of the assertion.

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

If assertion is CORRECT, but reason is INCORRECT.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

If assertion is INCORRECT, but reason is CORRECT.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

If both assertion and reason are INCORRECT.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B If both assertion and reason are CORRECT, but reason is NOT THE CORRECT explanation of the assertion.
Aluminum is chosen as metal for thermite welding since it has a strong affinity towards oxygen and its oxide, ${A l}_{2} O_{3}$ is a highly exothermic compound. A common thermite contains ferric oxide and aluminum in 3:1 ratio by mass. Hence, it is used in thermite welding of broken iron parts.
It is also true that Aluminium ores are concentrated by the method of chemical separation but it is not the correct reason why Aluminium is used for thermite welding.
Hence, If both assertion and reason are CORRECT, but the reason is NOT THE CORRECT explanation of the assertion.

Suggest Corrections

Similar questions

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

Q. Assertion: Aluminium is used as a reducing agent in the extraction of chromium from its oxide,

C r_{2} O_{3}

.
Reason: Reduction by Aluminium is known as Gold Schmidt thermite process or Aluminothermic process.

Assertion (A) Rate constant determined from Arrhenius equation are fairly accurate for simple as well as complex molecules.

Reason (R) Reactant molecules undergo chemical change irrespective of their orientation during collision.

Assertion (A) Order and molecularity are same.

Reason (R) Order is determined experimentally and molecularity is the sum of the stoichimetric coeffcient of rate determining elementary step.

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

Join BYJU'S Learning Program

Assertion : Aluminium is used for thermite welding.Reason : Aluminium ores are concentrated by the method of chemical separation.

Assertion : Aluminium is used for thermite welding.
Reason : Aluminium ores are concentrated by the method of chemical separation.