The evaporation of aqueous solution of sugar causes its molarity to__________________?

Related Mcqs:

1. 80 kg of Na2SO4 (molecular weight = 142) is present in 330 kg of an aqueous solution. The solution is cooled such that. 80 kg of Na2SO4 .10H2O crystals separate out. The weight fraction of Na2SO4 in the remaining solution is_________________?

   A. 0.00
   B. 0.18
   C. 0.24
   D. 1.00

2. A sugar solution containing _________________ percent sugar is equivalent to 1 Brix?

   A. 0.01
   B. 0.1
   C. 1
   D. 10

3. Na2SO4. 10H2O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na2SO4. The final concentration of the solute in the solution is 10%. The weight of crystals is________________?

   A. 20
   B. 32.2
   C. 45.35
   D. 58.65

4. The increase in the temperature of the aqueous solution will result in decrease of its________________?

   A. Weight % of the solute
   B. Mole fraction of the solute
   C. Molarity
   D. Molality

5. The weight fraction of methanol in an aqueous solution is 0.64. The mole fraction of methanol XM satisfies________________?

   A. XM < 0.5
   B. XM = 0.5
   C. 0.5 < XM < 0.64
   D. XM ≥ 0.64

6. An aqueous solution of 2.45% by weight H2SO4 has a specific gravity of 1.011. The composition expressed in normality is______________?

   A. 0.2500
   B. 0.2528
   C. 0.5000
   D. 0.5055

7. Increasing the temperature of an aqueous solution will cause decrease in its________________?

   A. Molality
   B. Mole fraction
   C. Weight percent
   D. Molarity

8. One of the specific gravity scales is “Brix” (used specifically for sugar solution). It is defined as ______________?

   A. Brix = (400/G) – 400
   B. Brix = 200 (G-1)
   C. Brix = 145 – (145/G)
   D. None of these

9. Acidity or alkanity of a solution is expressed by its pH value, which is defined as (where, [H+] = hydrogen ion concentration in the solution) ?

   A. log (1/H+)
   B. – log (1/H+)
   C. 1/log H+
   D. None of these

10. The elevation in boiling point of a solution is proportional to the ______________ of the solution?

    A. Molal concentration
    B. Reciprocal of the molal concentration
    C. Normality
    D. Molarity