R.R. Mishra Solutions for Exercise 2: SUMMATIVE ASSESSMENT QUESTIONS (As Per the Guidelines of the CBSE)

The $\mathrm{pH}$ of an aqueous solution of sodium acetate $\left({\mathrm{CH}}_3\mathrm{COONa}\right)$ is greater than $7$. Is it a true or false statement? Justify your answer.

Write the chemical reactions in which ${\mathrm{H}}_2{\mathrm{SO}}_4, \mathrm{NaOH}, {\mathrm{NaHSO}}_4, {\mathrm{H}}_2\mathrm{O}$ and ${\mathrm{Na}}_2{\mathrm{SO}}_4$ are involved.

How many times does the hydrogen ion concentration of a solution change when its $\mathrm{pH}$ is changed from $6$ to $4$.

Find the odd one out and justify your choice

Find the odd one out:

Find the odd one out and justify your choice

Find the odd one out and justify your choice

Four students $\mathrm{a}, \mathrm{b}, \mathrm{c}$ and $\mathrm{d}$ of class $\mathrm{X}$ measured the pH values of the given samples of distilled water, $0.1 \mathrm{M}$ solution of ethanoic acid, $0.1 \mathrm{M}$ solution of hydrochloric acid and $0.1 \mathrm{M}$ solution of sodium hydroxide using pH papers at $298 \mathrm{K}$. Tell which one of the following represents a correct measurement?