WBJEE SERIES Chemistry
Some Basic Concepts Of Chemistry
16 previous year questions.
Volume: 16 Ques
Yield: Medium
High-Yield Trend
1
2023 2
2018 1
2017 2
2012 2
2011 2
2010 1
2009 4
2008 1
2007 Chapter Questions 16 MCQs
01
PYQ 2007
medium
chemistry ID: wbjee-20
If molecular weight of is , then its equivalent weight in acidic medium would be
1
2
3
4
02
PYQ 2008
easy
chemistry ID: wbjee-20
solution will have same molar concentration as a
1
2
3
4
03
PYQ 2008
medium
chemistry ID: wbjee-20
Sodium nitrate on reduction with in presence of solution produces Mass of sodium nitrate absorbing mole of electron will be
1
7.75
2
10.625
3
8
4
9.875
04
PYQ 2008
medium
chemistry ID: wbjee-20
An unknown element forms an oxide. What will be the equivalent weight of the element if the oxygen content is by weight?
1
16
2
32
3
8
4
64
05
PYQ 2008
medium
chemistry ID: wbjee-20
mole of methyl amine on reaction with nitrous acid gives at
1
of nitrogen
2
of nitrogen
3
of nitrogen
4
of nitrogen
06
PYQ 2009
medium
chemistry ID: wbjee-20
An organic compound made of and contains nitrogen. Its molecular weight is :
1
70
2
140
3
100
4
65
07
PYQ 2010
medium
chemistry ID: wbjee-20
The molarity of a solution by dissolving of it in water is
1
0.4 M
2
0.8 M
3
0.2 M
4
0.1 M
08
PYQ 2010
medium
chemistry ID: wbjee-20
In the reaction of sodium thiosulphate with in aqueous medium, the equivalent weight of sodium thiosulphate is equal to
1
molar mass of sodium thiosulphate.
2
the average of molar masses of
and
3
half the molar mass of sodium thiosulphate.
4
molar mass of sodium thiosulphate
09
PYQ 2011
medium
chemistry ID: wbjee-20
of metal carbonate is neutralized completely by of . The equivalent weight of metal carbonate is
1
2
3
4
10
PYQ 2011
medium
chemistry ID: wbjee-20
The amount of the heat released when is mixed with is . The heat of neutralization is
1
2
3
4
11
PYQ 2012
medium
chemistry ID: wbjee-20
The weight of oxalic acid that will be required to prepare a solution is
1
126 / 100 g
2
63 / 40 g
3
63 / 20 g
4
126 / 20 g
12
PYQ 2012
medium
chemistry ID: wbjee-20
Equal weights of and are mixed in an empty container at . The fraction of the total pressure exerted by is
1
2
3
4
13
PYQ 2017
medium
chemistry ID: wbjee-20
In a flask, the weight ratio of and at and 1 bar is . The ratio of the number of molecules of and is
1
2
3
4
14
PYQ 2018
medium
chemistry ID: wbjee-20
A metal (specific heat ) forms a metal chloride with chlorine present in it. The formula of the metal chloride will be
1
2
3
4
15
PYQ 2018
medium
chemistry ID: wbjee-20
How many moles of electron weight one kilogram :
1
2
3
4
16
PYQ 2023
medium
chemistry ID: wbjee-20
The correct option for the above reaction is
1
2
3
4
