(A):CO from syn gas can be converted to $\mathrm{CO}_2$ by reacting with steam in the presence of $\mathrm{FeCrO}_4 \cdot 673 \mathrm{~K}$ or $\mathrm{Fe}_2 \mathrm{O}_3 / \mathrm{Cr}_2 \mathrm{O}_3 / 673 \mathrm{~K}$. (R): The conversion of $\mathrm{CO}$ to $\mathrm{CO}_2$ using steam is called water gas shift

Both $(A)$ and $(R)$ are true but $(R)$ is not the correct explanation of $(A)$

$(A)$ is true but $(R)$ is false

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JEE • CHEMISTRY • HYDROGEN

Hydrogen practice · Medium

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91 Medium

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Understanding +4 | -1

(A):CO from syn gas can be converted to

\mathrm{CO}_2

by reacting with steam in the presence of

\mathrm{FeCrO}_4 \cdot 673 \mathrm{~K}

\mathrm{Fe}_2 \mathrm{O}_3 / \mathrm{Cr}_2 \mathrm{O}_3 / 673 \mathrm{~K}

.

(R): The conversion of

\mathrm{CO}

\mathrm{CO}_2

using steam is called water gas shift

View answer and explanation

Correct option: A

Both

(A)

and

(R)

are true and

(R)

is the correct explnation of

(A)

Option A is correct because the conversion of CO to CO2 using steam is indeed called the water gas shift reaction, and this reaction is used to convert CO from syn gas.

92 Medium

92 of 94

Understanding +4 | -1

The bond energy of covalent O—H bond in water is:

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Correct option: B

Greater than bond energy of hydrogen bond

Option B is correct because covalent bonds are significantly stronger than hydrogen bonds due to electron sharing.

93 Medium

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Remembering +4 | -1

Permanent hardness of water can be removed by

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Correct option: D

Treatment with sodium hexametaphosphate

\left(\mathrm{Na}_6 \mathrm{P}_6 \mathrm{O}_{18}\right)

Option D (Treatment with sodium hexametaphosphate

(\mathrm{Na}_6 \mathrm{P}_6 \mathrm{O}_{18})

) is correct because this method sequesters the calcium and magnesium ions responsible for hardness.

94 Medium

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Remembering +4 | -1

Most common isotopes of hydrogen (non-radioactive) is

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Correct option: A

Protium

Option A (Protium) is correct because Protium (

^1_1H

) is the most common and non-radioactive isotope of hydrogen.

Revision notes and key takeaways

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