Q. Write the formula of the following compounds.
(i) Triamminetriaquachromium (III) chloride.
(ii) Potassiumhexacyanoferrate(III).

Q. The van't Hoff factor of acetic acid solution is __________ than one and the value of normal colligative property is __________ than the observed colligative property of this solution.

1. more, less
2. less, more
3. less, less
4. more, more

Q. An electrochemical cell converts __________ energy to ____________ energy.

1. Chemical
2. Electrical
3. Increases
4. Ions

Q. Explain giving reasons why:
(i) Ionic solids conduct electricity in molten state, but not in solid state.
(ii) Solution of sodium chloride has no effect on litmus, but a solution of zinc chloride turns blue litmus red.

Q. A $42$ molal solution of sodium chloride in water causes an elevation in the boiling point of water by $1.88$K. What is the value of Van't Hoff factor? What does it signify? $[K_b=0.52K$ kg $mo{l}^{-1}]$.

Q. Of the following terms used for denoting concentration of a solution, the one which does not get affected by temperature is __________.

1. Molality
2. Molarity
3. Normality
4. Formality

Q. Write the equation for the preparation of acetanilide from aniline.

Q. $K_c$ for the reaction $S{O}_{2\left(g\right)}+\frac{1}{2}{O}_{2\left(g\right)}\rightleftharpoons S{O}_{3\left(g\right)}$ is $61.7$ at ${60}^o$C. What is its unit? Calculate $K_p$ for the reaction and write its unit?

Q. The solubility of calcium hydroxide is $smollitr{e}^{-1}$. The solubility product under the same condition will be:

1. $4s^3$
2. $2s^3$
3. $2s^2$
4. $s^3$

Q. Among the following halogens, the one which does not form an oxyacid is:

1. Fluorine
2. Chlorine
3. Bromine
4. Iodine

Q. The crystal of graphite is made up of ___________ while that of sodium chloride is made up of __________.

1. atoms, ions
2. ions, atoms
3. molecules, ions
4. molecules, atoms

Q. A current liberates $0.50g$ of hydrogen in $2$ hours. The weight of copper(At. wt. $=63.5$) deposited at the same time by the same current through copper sulphate solution is:

1. $15.9g$
2. $63.5g$
3. $15.5g$
4. $31.8g$

Q. Match the following.

Q. $0.05$M NaOH solution offered a resistance of $31.6$ohm in a conductivity cell at $298$K. If the cell constant of the cell is $0.367c{m}^{-1}$, calculate the molar conductivity of the NaOH solution.

Q. An ionic compound is made up of A cations and B anions. If A cations are present at the alternate corners and B anion is present on the body of the diagonal, what is the formula of the ionic compound?

Q. What happens when a nickle rod is dipped into a copper sulphate solution? Justify your answer. $[E_{N{i}^{+2}/Ni}^0=-0.25$v and $E_{C{u}^{+2}/Cu}^0=+0.34v]$.

Q. The molar conductance of a solution ___________ with dilution while its specific conductance ________ with dilution.

1. decrease, increases
   
2. decreases, decreases
   
3. increases, decreases
4. increases, increases
   

Q. What is standard hydrogen electrode?

Q. In a crystal of diamond:
(i) How many carbon atoms are present per unit cell?
(ii) What type of lattice does diamond crystallize in?
(iii) How many carbon atoms surround each carbon atom?
(iv) How are they arranged?

Q. (i) Write the mathematical expression relating the variation of rate constant of a reaction with temperature.
(ii) How can you graphically find the activation energy of the recation from the Arrhenius expression?
(iii) The slope of the line in the graph of log k(k=rate constant) versus $\frac{1}{T}$ is $-5841$. Calculate the activation energy of the reaction.

Q. What happens to the equilibrium in a reversible reaction if a catalyst is added to it?

Q. Define Raoult's law for the elevation of boiling point of a solution.

Q. What is the $\left[O{H}^{-}\right]$ concentration of an acid whose pH is $5$ at ${25}^o$C?

Q. Define Frenkel defect in solid crystal.

Q. Ethyl isocyanide on hydrolysis with dilute sulphuric acid gives:

1. ethylamine
2. propanoic acid
3. methylamine
4. formic acid

Q. State the effect of the following on the rection $2S{O}_{2\left(g\right)}+O_{2\left(g\right)}\rightleftharpoons 2S{O}_{3\left(g\right)}+189.4$kJ at equilibrium:
(i) Temperature is increased.
(ii) Concentration of $S{O}_2$ is increased.
(iii) Pressure is decreased.
(iv) Helium is added at constant presuure.

Q. Explain why phenolphthalein is used as an indicator in acid-base titration.

Q. What will be the vapour pressure of a solution containing $5$ moles of sucrose $\left(C_{12}{H}_{22}{O}_{11}\right)$ in $1kg$ of water, if the vapour pressure of pure water is $4.57mm$ of $Hg$ ? $[C=12,H=1,O=16]$

Q. Natural rubber is a:

1. polyester
2. polyamide
3. polyisoprene
4. polysaccharide

Q. $0.3605$g of a metal is deposited on the electrode by passing $1.2$ amperes of current for $15$ minutes through its salt solution. The atomic weight of the metal is $96$. What is the valency of the metal?