In the reaction of sodium thiosulphate with I2 in aqueous medium,

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsLong Answer Type

351.

Compound A treated with NaNH2 followed by CH3CH2Br gave compound B. Partial hydrogenation of compound B produced compound C, which on ozonolysis gave a carbonyl compound D, (C2H5O). Compound D did not respond to the iodoform test with I2/KI and NaOH. Find out the structures of A, B, C and D.


 Multiple Choice QuestionsMultiple Choice Questions

352.

The volume of ethyl alcohol (density 1.15 g/cc) that has to be added to prepare 100 cc of 0.5 M ethyl alcohol solution in water is

  • 1.15 cc

  • 2 cc

  • 2.15 cc

  • 2.30 cc


353.

2 g of metal carbonate is neutralised completely by 100 mL of 0.1 N HCI. The equivalent weight of metal carbonate is:

  • 50

  • 100

  • 150

  • 200


354.

An excess of AgNO3 is added to 100 mL of a 0.01 M solution of dichlorotetraaquachromium (III) chloride. The number of moles of AgCl precipitate would be

  • 0.001

  • 0.002

  • 0.003

  • 0.01


Advertisement
355.

6.02 x 1020 molecules of urea are present in 100 mL of its solution. The concentration of solution is

  • 0.02 M

  • 0.01 M

  • 0.001 M

  • 0.1 M


356.

The normality of 30 volume H2O2 is:

  • 2.678 N

  • 5.336 N

  • 8.034 N

  • 6.685 N


357.

An organic compound made of C, H and N contains 20% nitrogen. Its molecular weight is

  • 70

  • 140

  • 100

  • 65


Advertisement

358.

In the reaction of sodium thiosulphate with I2 in aqueous medium, the equivalent weight of sodium thiosulphate is equal to

  • molar mass of sodium thiosulphate

  • the average of molar masses of Na2S2O3 and I2

  • half the molar mass of sodium thiosulphate

  • molar mass of sodium thiosulphate × 2


A.

molar mass of sodium thiosulphate

In the reaction of sodium thiosulphate with I2 in aqueous medium, the equivalent weight of sodium thiosulphate is equal to molar mass of sodium thiosulphate.

2Na23S2+2O + I2 → Na26S4+2.5O + 2NaI

n factor = 1

E = M1 = M


Advertisement
Advertisement
359.

The molarity of a NaOH solution by dissolving 4 g of it in 250 mL water is

  • 0.4 M

  • 0.8 M

  • 0.2 M

  • 0.1 M


360.

If it is assumed that U92235 decays only by emitting α-and (β-particles, the possible product of the decay is

  • Ac89225

  • 89227Ac

  • Ac89230

  • Ac89231


Advertisement