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Standard VIII

Physics

Electroplating

Assertion:Chr...

Question

Assertion:Chromium plating is done on many objects like car parts, wheel rims and bath taps.
Reason:The chromed layer can be decorative, provide corrosion resistance, ease cleaning procedures, or increase surface hardness.

Assertion is correct and Reason is incorrect

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Assertion is incorrect and Reason is correct

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Both Assertion and Reason is correct and Reason is the correct explanation of Assertion

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Both Assertion and Reason is correct but Reason is not the correct explanation of Assertion

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Solution

The correct option is B Both Assertion and Reason is correct and Reason is the correct explanation of Assertion
Both the statement are correct and explains the assertion. Chromium avoids corrosion and increase the hardness thus increasing the life of the iron materials like rims and car parts. It can be decorative, provide corrosion resistance, ease cleaning procedures, or increase surface hardness.

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Similar questions

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.

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.

Assertion: All the points (1, 0), (-1, 0), (2, 0) and (5, 0) lie on the x – axis.
Reason: Equation of the x-axis is y = 0

Choose the correct option.

Q. Assertion: The impurities such as

{SiO}_{2}

present in iron ore is removed by

{CaCO}_{3}

.

Reason:

CaO

formed by decomposition of

{CaCO}_{3}

reacts with

{SiO}_{2}

to form slag.

Assertion (A) Boiling points of alcohols and ethers are high.
Reason (R) They can form intermolecular hydrogen-bonding.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

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Assertion:Chromium plating is done on many objects like car parts, wheel rims and bath taps.Reason:The chromed layer can be decorative, provide corrosion resistance, ease cleaning procedures, or increase surface hardness.

Assertion:Chromium plating is done on many objects like car parts, wheel rims and bath taps.
Reason:The chromed layer can be decorative, provide corrosion resistance, ease cleaning procedures, or increase surface hardness.