An organic substance containing carbon , hydrogen and oxygen

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 QuestionsMultiple Choice Questions

311.

The number of H+ ion in half normal solution of Na2CO3 and CH3COOH :

  • > 10-7 m

  • 10-7 m

  • < 10-7

  • 10-5 m


312.

The amount of BaSO4 precipitated on mixing BaCl2 (0.5 M) with H2SO4 (1 M) will correspond to

  • 0.5 M

  • 1.0 M

  • 1.5 M

  • 2.0 M


313.

How many significant figures are present in 0.0000135?

  • 7

  • 8

  • 4

  • 3


314.

100 cc of 0.6 N H2SO4 and 200 cc of 0.3 N HCl were mixed together .The normality of the solution will be :

  • 0.2 N

  • 0.4 N

  • 0.8 N

  • 0.6 N


Advertisement
315.

Assertion : One mole of NaCl contains 6.023 × 1023 molecules of sodium chloride.

Reason : 58.5 g of NaCl also contains 6.023 x 1023 molecules of NaCl.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false

  • If both assertion and reason are false.


316.

A solution contains 25% H2O , 25% C2H5OH and 50% CH3COOH by mass .The mole fraction of H2O would be :

  • 0.25

  • 2.5

  • 0.502

  • 5.03


Advertisement

317.

An organic substance containing carbon , hydrogen and oxygen gave the following percentage composition .

C = 40.687 % , H = 5.085% and O = 54.228 % 

What is the empirical formula of the compound ?

  • CH3O

  • C2H2O

  • CH4O

  • C2H3O2


D.

C2H3O2

Symbol Percentage Relative no. of moles

Simplest molar ratio

Simplest whole no. molar ratio
C 40.687 40.68712 = 3.390 3.3903.389 = 1       2
H 5.085 5.0851 = 5.085 5.0853.389 = 1.5       3
O 54.228 54.22816 = 3.389 3.3893.389 = 1        2

Advertisement
318.

How many grams of CO2 will be produced by the complete combustion of 2 moles of ethanol ?

  • 132 g

  • 44 g

  • 176 g

  • 88 g


Advertisement
319.

Which of the following changes with change in temperature ?

  • Mole fraction

  • Formality

  • % (w/W)

  • Molality


320.

Equal weight of CO and CH4 are mixed together in an empty container at 300 K. The fraction of total pressure exerted by CH4 is.

  • 1617

  • 711

  • 89

  • 516


Advertisement