a) Write any two differences between order and molecularity of a reaction. b) Draw a graph showing the relationship between concentration of reactant…

a) Write any two differences between order and molecularity of a reaction. 

 b) Draw a graph showing the relationship between concentration of reactant and time for a zero order reaction.

c) The experimental data for a hypothetical reaction \( \text{X} + \text{Y} \rightarrow \text{Z} \) is:

Expt. no	[X]molL−1	[Y]molL−1	initial rate, molL−1s−1
I	0.5	0.5	\( 1.6 \times 10^{-4} \)
II	0.5	1.0	\( 3.2 \times 10^{-4} \)
III	1.0	1.0	\( 3.2 \times 10^{-4} \)

Determine the rate constant and write down rate law equation from the above data. 

d) What is the order of reaction with respect to X ? 

OR

a) i) What is meant by weak electrolyte? 

ii) Derive Ostwald's dilution equation. 

iii) Point out any two limitations of Ostwald's dilution law. 

b) Predict whether precipitation will occur or not on mixing \( 20\text{ mL} \) of \( 1 \times 10^{-3}\text{ N} \) of \( \text{NaCl} \) solution with \( 80\text{ mL} \) of \( 1 \times 10^{-2}\text{N} \) \( \text{AgNO}_3 \) solution if \( \text{K}_{\text{sp}} \) for \( \text{AgCl} = 1.5 \times 10^{-10} \).\( [At.wt. of \text{Ag} = 108\text{ amu}.] \)