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JEE-ADVANCED SERIES
Chemistry

Some Basic Concepts Of Chemistry

19 previous year questions.

Volume: 19 Ques
Yield: Medium

High-Yield Trend

1
2022
1
2011
1
2009
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2007
1
2003
1
2002
3
2001
2
1988
1
1987
1
1986
1
1984
1
1981
4
1979

Chapter Questions
19 MCQs

01
PYQ 1979
easy
chemistry ID: jee-adva
2.76 g of silver carbonate on being strongly heated yields a residue weighing
1
2.16 g
2
2.48 g
3
2.32 g
4
2.64 g
02
PYQ 1979
medium
chemistry ID: jee-adva
The largest number of molecules is in
1
34 g of
2
28 g of
3
46 g of ethyl alcohol
4
54 g of nitrogen pentaoxide
03
PYQ 1979
medium
chemistry ID: jee-adva
The total number of electrons in one molecule of carbon dioxide is
1
22
2
44
3
66
4
88
04
PYQ 1979
medium
chemistry ID: jee-adva
When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volumes of hydrogen evolved is
1
1:01
2
1:02
3
2:01
4
9:04
05
PYQ 1981
medium
chemistry ID: jee-adva
If 0.5 mol of is mixed with 0.2 mol of the maximum number of moles of that can be formed is
1
0.7
2
0.5
3
0.1
4
0.2
06
PYQ 1984
medium
chemistry ID: jee-adva
The IUPAC name of the compound having the formula is
1
3, 3, 3-trimethyl-1-propene
2
1, 1, 1-trimethyl-2-propene
3
3, 3-dimethyl-1-butene
4
2, 2-dimethyl-3-butene
07
PYQ 1986
easy
chemistry ID: jee-adva
A molal solution is one that contains one mole of solute in
1
1000 g of solvent
2
1.0 L of solvent
3
1.0 L of solution
4
22.4 L of solution
08
PYQ 1987
medium
chemistry ID: jee-adva
If two compounds have the same empirical formula but different molecular formulae, they must have
1
different percentage composition
2
different molecular weight
3
same velocity
4
same vapour density
09
PYQ 1988
medium
chemistry ID: jee-adva
The equivalent weight of MnSO is half of its molecular weight, when it converts to
1
2
3
4
10
PYQ 1988
medium
chemistry ID: jee-adva
In which mode of expression, the concentration of a solution remains independent of temperature?
1
Molarity
2
Normality
3
Formality
4
Molality
11
PYQ 2001
medium
chemistry ID: jee-adva
An aqueous solution of oxalic acid dehydrate is made upto . The volume of required to completely neutralize . of this solution is
1
2
3
4
12
PYQ 2001
medium
chemistry ID: jee-adva
In the standardisation of Na using K by iodometry, the equivalent weight of K is
1
(molecular weight)/2
2
(molecular weight)/6
3
(molecular weight)/3
4
same as molecular weight
13
PYQ 2001
medium
chemistry ID: jee-adva
The reaction, is an example of
1
oxidation reaction
2
reduction reaction
3
disproportionation reaction
4
decomposition reaction
14
PYQ 2002
medium
chemistry ID: jee-adva
How many moles of electron weighs 1 kg?
1
2
3
4
15
PYQ 2003
medium
chemistry ID: jee-adva
Which has maximum number of atoms?
1
24 g of C (12)
2
56 g of Fe (56)
3
27 g of A1 (27)
4
108 g of Ag (108)
16
PYQ 2007
easy
chemistry ID: jee-adva
Consider a titration of potassium dichromate with acidified Mohr?s salt solution using diphenylamine as indicator. The number of moles of Mohr?s salt required per mole of dichromate is :
1
2
3
4
17
PYQ 2009
medium
chemistry ID: jee-adva
Given that the abundant of isotope , and are , and respectively, the atomic mass of is :
1
2
3
4
18
PYQ 2011
medium
chemistry ID: jee-adva
Dissolving 120 g of urea (mol. wt. 60) in 1000 g of water gave a solution of density 1.15 g/mL. The molarity of the solution is
1
1.78 M
2
2.00 M
3
2.05 M
4
2.22 M
19
PYQ 2022
medium
chemistry ID: jee-adva
To check the principle of multiple proportions, a series of pure binary compounds were analyzed and their composition is tabulated below. The correct option(s) is(are)
CompoundWeight % of P Weight % of Q
15050
244.455.6
34060
1
If empirical formula of compound 3 is , then the empirical formula of compound 2 is .
2
If empirical formula of compound 3 is and atomic weight of element is 20 , then the atomic weight of is 45 .
3
If empirical formula of compound 2 is , then the empirical formula of the compound is
4
If atomic weight of and are 70 and 35 , respectively, then the empirical formula of compound 1 is .