Q. When potassium cyanide reacts with water, will the resulting solution be acidic, alkaline or neutral? Justify your answer.

Q. When acetic acid is reacted with calcium hydroxide and the product is distilled dry, the compound formed is _________.

1. Acetone
2. Acetaldehyde
3. Calcium acetate
4. Acetic anhydride

Q. Calculate the maximum work that can be obtained from the given electrochemical cell constructed with two metals $M$ and $N$.
$[E_{M^{+2}/M}^o=-0.76V,E_{N^{+2}}^o/N=+0.34V]$
The cell reaction is $M+N^{+2}\to M^{+2}+N$

Q. Write the formula of the product formed when formaldehyde reacts with ammonia and name the product?

Q. If the ionization (dissociation) constant of acetic acid is $k_a$, what will be the pH of a solution containing equal concentrations of acetic acid and sodium acetate?

Q. In a plot of $logk$ vs $1/T$, the slope is ____________.

1. $\frac{E_a}{2.303R}$
2. $\frac{E_a}{2.303}$
3. $\frac{-E_a}{2.303R}$
4. $\frac{-E_a}{2.303}$

Q. The molecular weight of $H_{2}S$ is more than that of $H_{2}O$, but $H_{2}S$ is a gas and $H_{2}O$ is a liquid. Explain.

Q. The quantity of electricity required to deposit 1.15 g of sodium from molten NaCl (Na = 23, Cl = 35.5) is :

1. 0.5 F
2. 0.05 F
3. 1.5 F
4. 1 F

Q. A solution of urea in water has a boiling point of 100.18${}^o$C. Calculate the freezing point of the solution. (K${}_f$ for water is 1.86 K kg mol${}^{-1}$ and K${}_b$ for water is 0.512 K kg mol${}^{-1}$).

Q. The central atom of methane and water is in the same state of hybridization, but the shapes of the two molecules are different. Discuss.

Q. Give one example (equation) of a homogeneously catalysed reaction and name the catalyst.

Q. To precipitate group III cations $N{H}_{4}Cl$ should be added to the solution before the addition of ammonium hydroxide. Explain why.

Q. State the second law of thermodynamics in terms of the entropy of the universe.

Q. The $\left[O{H}^{-}\right]$ concentration of a weak base is given by _________ .

1. $C{K}_b$
2. $\sqrt{C{K}_b}$
3. $\sqrt{\frac{K_b}{C}}$
4. $\sqrt{K_b}$

Q. A solution X is prepared by dissolving three moles of glucose in one litre of water and a solution Y is prepared by dissolving 1.5 moles of sodium chloride in one litre of water. Will the osmotic pressure of X be higher, lower or equal to that of Y? Give a reason for your answer.

Q. Match the following

Q. For a spontaneous change to take place, the $\Delta$S of the system should be ________ and $\Delta$G of the system should be _____.

Q. Among the following coordination compounds, the one giving a white precipitate with $BaC{l}_2$ solution is:

1. $\left[Cr\right(H_{2}O{)}_{5}Br]S{O}_4$
2. $\left[Cr\right(H_{2}O{)}_{5}SCN]$
3. $\left[Co\right(N{H}_3{)}_{5}S{O}_4]Br$
4. $\left[Pt\right(N{H}_3{)}_6]C{l}_4$

Q. A study of chemical kinetics of the reaction A + B $\to$ products, gave the following data at 25${}^o$C:

Experiment	[A]	[B]	$\frac{d\left[Products\right]}{dt}$
1	1.0	0.15	$4.20\times {10}^{-6}$
2	2.0	0.15	$8.40\times {10}^{-6}$
3	1.0	0.20	$5.60\times {10}^{-6}$

Find:
(1) The order of reaction with respect to A.
(2) The order of reaction with respect to B.
(3) The rate law.

Q. The conductivity of 0.2 M KCl solution is $3\times {10}^{-2}oh{m}^{-1}c{m}^{-1}$. Calculate its molar conductance.

Q. Why are crystals having F-centres paramagnetic?

Q. A solution of lactose containing 8.45 g of lactose in 100 g of water has a vapour pressure of 4.559 mm of Hg at 0${}^o$C. If the vapour pressure of pure water is 4.579 mm of Hg, calculate the molecular weight of lactose.

Q. Zinc can displace __________ from $CuS{O}_4$ solution, but cannot displace _______ from $MgS{O}_4$ solution.

Q. $\pi$ bonds are formed by the _______ overlap of _______ orbitals.

Q. What are F-centres in an ionic crystal?

Q. Solutions which strictly obey _________ law are called _____ solutions.

Q. Draw the valence shell molecular orbital diagram of oxygen molecule and predict its magnetic nature.

Q. Calculate the solubility of lead chloride in water, if its solubility product is $1.7\times {10}^{-5}$.
(Pb = 206, Cl = 35.5)

Q. What is the electronic configuration of chromium atom (Z = 24)? Give a reason for your answer.

Q. Hydrolysis of methyl propanoate gives ______ and _________.