Question

Assertion (A): Alloys are commonly used in electrical heating devices like electric iron and heater.

Reason (R): The resistivity of an alloy is generally higher than that of its constituent metals but the alloys have low melting points than their constituent metals.

• A. Both (A) and (R) are true and (R) is correct explanation of the assertion.
• B. Both (A) and (R) are true but (R) is not the correct explanation of the assertion.
• C. (A) is true but (R) is false
• D. (A) is false but (R) is true.

Answer 1

The correct option is C

(A) is true but (R) is false

The explanation for the Assertion statement,

1. An alloy can be made out of metal as well as a nonmetal. So it has properties of both metal and nonmetal.
2. The ions in it are organized in a random manner because of being an alloy.
3. This substance does not have a particular arrangement of ions.
4. Alloys have a wide variety of uses due to their high melting point.
5. The interpretation of alloys actually reduces the material’s price and maintains the metal’s desired properties.
6. The combination of metals improves material properties and offers resistance to oxidation and mechanical strength.
7. It is used for many home decorative items and is composed of copper and zinc.
8. The alloy of bronze is used for making statues and medals as well as home decorates.
9. The carbon steel alloy is used for weapon making, while in household items, it’s used in high tensile blade making. These are used in grinders, blenders, and juicers.

Hence, the assertion statement is correct.

The explanation for the Reason statement,

1. Alloys generally have a high melting point as compared to individual elements.
2. The electrical heating devices must have a high melting point so that they do not melt even at high temperatures when an electrical current passes through the device
3. Thus, the reason is an incorrect explanation of the assertion

Hence, option C is the correct answer.