Solutions Set 4 - ilmijazeera

Results

#1. 1 kg of sea water contains 4.96 x 10–3 gm of dissolved oxygen. The concentration of oxygen in sea water in ppm is

4.96 x 10–2

0.496

4.96

49.6

#2. A solution of sucrose is 34.2%. The volume of solution containing one mole of solute

500 cm3

1000 cm3

342 cm3

3420 cm3

#3. Salt of a weak acid with strong base when dissolved in water gives

acidic solution

basic solution

neutral solution

none

#4. Mole fraction of 10% urea is

0.042

0.072

0.032

0.023

#5. Which of the following mixtures of liquids show negative deviation

ethyl alcohol ether

HCl and water

phenol – water

chlorobenzene – bromobenzene

#6. The term cryoscopy is used

depression of freezing point

elevation in boiling point

lowering of vapour pressure

osmotic pressure

#7. The term ebullioscopy is used

depression of freezing point

elevation in boiling point

lower of vapour pressure

none of above

#8. Azeotropic mixture

obey Henry’s law

obey Raoult’s law

do not obey Raoult’s law

obey Dalton’s law

#9. Hydrolysis of potassium acetate produce

acidic solution

neutral solution

basic solution

none of these

#10. Which one of the following salts will not hydrolyse

NaCl

AlCl3

Na2CO3

CH3COONa

Finish