Chemistry 1st Paper CQ-Dinajpur Board-2021

Write down the La-Chatelier's principle.

What one is more stronger acid between $\mathrm{HNO}_{3}$ and $\mathrm{HClO}_{4}$ ? Explain.

Calculate the solubility product of $\mathrm{Mg}(\mathrm{OH})_{2}$.

Analyze whether the precipitation will be formed or not if two solutions of pot $\mathrm{Y}$ and pot $\mathrm{Z}$ are mixed together.

Define $\mathrm{pH}$.

$\mathrm{H}_{2} \mathrm{O}$ is a polar compound-Explain.

Why ionization energy of $\mathrm{Y}$ is greater than that of $\mathrm{Z}$ ?

The hybridization of the compound formed by $X, Y$ and $\mathrm{X}, \mathrm{Z}$ is same but the shape is different. - Analyze.

Write down the law of mass action.

Why $\mathrm{P}^{\mathrm{H}}$ scale lies in between $0-14$ ?

Complete the reactions of the stem.

Analyze the importance of $Z$ as preservative.

What is called quantum number?

The geometrical shape of $\mathrm{BeCl}_{2}$ is linear-Explain.

Determine the value of $\mathrm{K}_{\mathrm{p}}$ for the reaction mentioned in the stem.

Determine the value of $\mathrm{K}_{\mathrm{p}}$ for the reaction mentioned in the stem.

What is Orbit?

Explain the ionic product of water.

At low temperature, atomic weight of $A D$, becomes double -Explain.

Explain with reactions the nature of the oxides of the elements.