Chemistry 1st Paper CQ-Cumilla Board-2017

What is orbital?

At $25^{\circ} \mathrm{C}$ the solubility of $\mathrm{KNO}_{3}$ is 31.6 , what do you mean by it?

Show the identification of the cation and anion of container $A$ with equation.

If container A and B are mixed, will there be any ppt of $\mathrm{CaF}_{2}$ ? Analyze mathematically.

What is solubility?

Why 2d orbital is not possible?

Discuss the storage nethods of the chemicals mentioned in the stem.

Is it harmful for health and environment due to uncontrolled use of the compounds given in the stem? Analyse.

What is green chemistry?

Why does safety goggles tuse in the laboratory?

Calculate pH of the solution in container-B in the stem.

Analyze whether heat of neutralization heat of the mixture of solution $A$ and $B$ and the mixture of solution $B$ and $C$ are same.

What is fractional distillation?

Explain whether Zinc is a transition element.

Determine the value of $K_{P}$ of the reaction in the stem.

Analyze whether the change of amount of product when temperature and pressure of the reaction are changed at its equilibrium.

What is catalyst poision?

Why is $\mathrm{HCl}$ a polar compound?

Explain the bonds present in $\mathrm{YX}_{4} \mathrm{Z}$ compound in the light of stem.

$\mathrm{YX}_{3}$ and $\mathrm{YX}_{4}^{+}$have similar type of hybridisation, still they have different bond angles. Analyse the reason.