Assertion (A) : If `30 mL` of `H_(2)` and `20 mL` of `O_(2)` react to form water, `5 mL` of `H_(2)` is left at the end of the reaction.
Reason (R ): `H_(2)` is the limiting reagent.

Options

A. If both (A) and (R ) are correct and (R ) is the correct explantion for (A)
B. If both (A) and (R ) are correct but (R ) is not the correct explantion for (A)
C. If (A) is correct but (R ) is incorrect.
D. If (A) and (R ) are incorrect.

Answer

D

Explanation

`(A)` is wrong, but `(R )` is correct.
`underset(30 mL)(H_(2)) + underset({:(15 mL),("reacted"):})((1)/(2) O_(2)) rarr H_(2) O`
volume of `O_(2)` left `= 20 - 15 = 5 mL`
`(R )` is correct, since `H_(2)` is completely consumed, and hence is the limiting reagent.