Question

please pls pls give me the correct answer​

Answer 1

Explanation:

both are true reason is correct explaination with assertion

Answer 2

In the type of question , first we have to check whether Assertion and Reason are true or not. Then we have to check Reason is correct explanation of Assertion or not.

Now, to check if assertion is true or not ,we will find oxidation state of Hydrogen in H₂O and CaH₂.

➡️Oxidation state of Hydrogen in H₂O :-

Let oxidation state of Hydrogen in H₂O be x.

➝ 2x + (-2) = 0

➝ 2x - 2 = 0

➝ 2x = 2

➝ x = +1

Therefore, oxidation state of hydrogen in H₂O = +1

➡️Oxidation state of Hydrogen in CaH₂ :-

Let oxidation state of Hydrogen in CaH₂ be y.

➝ 2 + 2y = 0

➝ 2y = -2

➝ y = -1

Therefore, oxidation state of hydrogen in CaH₂ = -1

➡️ Assertion is true.

Now, reason states that CaF₂ is metal hydride and for metal hydride , H is assigned the oxidation state of -1. Reason is true and it is correct explanation of assertion because CaH₂ is also metal hydride.

We can understand with examples of metal hydrides.

Example of metal hydrides ( with oxidation state of hydrogen atom) are :-

1. MgH₂ => oxidation state of hydrogen is -1

2.NaAlH₄ => Oxidation of hydrogen is -1.

Answer :-

Both Assertion and Reason are true & the Reason is correct explanation of the Assertion.