Chemistry 1st Paper CQ-Rajshahi Board-2023

What is alkaline earth metal?

$\mathrm{N}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}(\mathrm{g})$; Is there any effect of pressure in this reaction?

Calculate the rate of dissociation of pot-1 solute.

Analyze how the $\mathrm{pH}$ value of mixed solution of pot-1 and pot-2 remains unchanged due to addition of small amount of a strong acid and base.

What is line spectrum?

How does BHA protect oxidation of food?

Explain the formation of $\mathrm{XY}_{2}$ in hybridization concept.

Analyze that $\mathrm{ZCl}_{4}$ is hydrolyzed but $\mathrm{XCl}_{4}$ is not.

What is buffer solution?

Why melting point of $\mathrm{MgCl}_{2}$ is less than that of $\mathrm{NaCl}$ ?

Mention the possible values of $x$ of the stem with logic.

Is the compound $\mathrm{ACl}$ colored if $\mathrm{A}^{+}$ion is diamagnetic? Analyze.

What is vinegar?

Why the value of electron affinity of $\mathrm{Mg}$ is positive?

Explain the stem spectrum series according to Bohr's concepts.

Will all the spectral lines of B series visible or not? Analyze.

What is called polarization?

Explain that reversible reaction is an incomplete reaction.

Why boiling point of $\mathrm{A}_{2} \mathrm{D}$ is more than that of $\mathrm{AB}$ ?

Analyze that, in hybridization of $\mathrm{X}$ and $\mathrm{Y}$ of the stem there are difference.