Ion Electron Method

Q.

$xKMn{O}_4+y{K}_2{C}_2{O}_4+z{H}_{2}S{O}_4⟶aMn{O}_4+bC{O}_2+6K_{2}S{O}_4+8H_{2}O$

Here x, y, z, a and b are respectively

1. 2, 5, 8, 2, 10

2. 2, 4, 9, 4, 10

3. 5, 9, 12, 4, 10

4. None of these

Q. Assertion :$Sn$ reacts with $HCl$ to produce $H_2$ gas. Reason: $Sn$ is a better reducing agent than $H_2$.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Calculate $\left[H^{+}\right]$ at equivalent point between titration of $0.1M,25mL$ of weak acid $HA(K_{a\left(HA\right)}={10}^{-5})$ with $0.05MNaOH$ solution:

1. $3\times {10}^{-9}$
2. $1.732\times {10}^{-9}$
3. $8$
4. $10$

Q.

Assume the following reaction is carried out in acidic medium.
$6e^{-}+C{r}_2{O_7}^{2-}⟶2{Cr}^{3+}+7H_{2}O$

How many $H^{+}$ do we need to add to the LHS to balance the H atoms?

1. 10

2. 6

3. 7

4. 14

Q. Identify the reactant that is getting reduced in the given redox reaction.

$2{\mathrm{Fe}}_2{O}_3\left(s\right)+3C\left(s\right)\to 4\mathrm{Fe}\left(s\right)+3{\mathrm{CO}}_2\left(g\right)$

1. ${\mathrm{Fe}}_2{O}_3$
2. C

Q. In a chemical reaction, the total mass of reactants is equal to the total mass of products.

1. True
2. False