Pathak's Academy Spectrum
Class - XII
Sub. - Chemistry
Max. Marks - 25 Time - 1 Hr.
Section - A
Q.No. 1 : Select and write the correct answer [04]
i) The colligative property of a solution is __________
a) Vapour pressure b) Osmotic pressure
c) Boiling point d) Freezing point
ii) Concentration of solution having osmotic pressure of 0.082 atm
at 300 k would be ________
a) 0.04 M b) 0.44 M c) 0.033 M d) 1 M
iii) Phenol on reaction with conc. HNO3 gives _________
a) Acetic acid b) Cyclohexanol
c) Picric acid d) p-nitrophenol
iv) Resorcinol on distillation with Zn - dust gives _________
a) Cyclohexane b) Benzene
c) Toluene d) Benzenol
Q. 2 Answer the following. [03]
i) Write the product 'A' of the reaction ethyl alcohol CrO3 A
ii) Write IUPAC name of CH3-O-CH-CH3
|
CH3
iii) What is cryoscopic constant?
Section - B
Attempt any Four. [4 x 2 = 8 M]
3) How will you prepare phenol from cumene?
4) State and explain Raoult's law for the solution containing non
volatile solute.
5) What is the action of CH3MgBr on Acetaldehyde?
6) The boiling point of solution containing 2.62 g of substance 'A' of
100 g of water is higher by 0.0150C than the boiling point of pure
water. What is molar moss of substance 'A' [Kb = 5.12 Km-1]
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