CBSE
Multiple Choice QuestionsEqual weight of CO and CH4 are mixed together in an empty container at 300 K. The fraction of total pressure exerted by CH4 is.
Which of the following changes with change in temperature ?
Mole fraction
Formality
% (w/W)
Molality
Molarity of a given orthophosphoric acid solution is 3 M .It's normality is :
9 N
0.3 N
3 N
1 N
Ksp of CaSO4.5H2O is 9 10-6, find the volume for 1 g of CaSO4 (M.wt. = 136).
2.45 litres
5.1 litres
4.52 litres
3.2 litres
Which ofthe following sequence contains atomic number of only representative elements?
55,12,48,53
13,33,54,80
3,33,53,87
22,33,55,66.
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
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
The molarity of a 0.2 N Na2CO5 solution will be :
0.05 M
0.2 M
0.4 M
0.1 M
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
100 cm3 of a given sample of H2O2 gives 1000 cm3 of O2 at S.T.P. The given sample is
10% H2O2
90% H2O2
10 volume H2O2
100 volume H2O2
