Sample Paper Chemistry

Chromate and dichromate, Carboxylic acid, Acetaldehyde

Q.1 Bond enthalpy of fluorine is lower than that of chlorine, why? Q.2 Give the IUPAC name of the following compound:

Q.3 On increasing temperature, activation energy of a reaction decreases, why? Q 4 Which of the following is most effective electrolyte in the coagulative of AgI/Ag+sol? K2SO4, MgCl2, K4[Fe(CN)6]
Q.5 Write the reaction when glucose is heated with excess of HI. Q.6 Which Xe compound has distorted octahedral shape?
Q.7 What is the denticity of co-ordination compound used for the treatment of lead Poisoning? Q.8 An alkoxide is a stronger base than hydroxide ion. Justify. Q.9 (a) State the law which helps to determine the limiting molar conductivity of weak electrolyte.

(b) Calculate limiting molar conductivity of CaSO4 (limiting molar conductivity of calcium and sulphate ions are 119.0 and160.0 S cm
Q.10 Rate constant K for first order reaction has been found to be 2.54 x 10 -3
. Calculate its
three-fourth life.
A first order gas reaction A2(g)B2(g) → 2A(g) + 2B(g)
at the temperature 400
C has the rate
Constant K =2.0x10
. What percentage of A2B2 is decomposed on heating for 900
Q.11 Do the following conversions:
(i) Methyl bromide to acetone.
(ii) Benzyl chloride to 2-phenyl acetic acid.

Q.12 How will you distinguish between the following pairs of compounds: (i) Chloroform and carbon tetra chloride.
(ii) Benzyl alcohol and chlorobenzene.

Q.13 For a chemical reaction variation in rate with conc. is shown below: Rate
Conc.—→ What is the order of the reaction?
What are the units of rate constant K for the reaction?
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