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Previous year question hub

Some Basic Concepts Of Chemistry - Physical Chemistry - Chemistry Previous Year Questions

Practice Some Basic Concepts Of Chemistry - Physical Chemistry - Chemistry previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

37Papers
31Years
60Questions
1Topics

Some Basic Concepts Of Chemistry question pattern

Every graph below is calculated only from this selection.

Questions by year

Year-wise coverage for Some Basic Concepts Of Chemistry. Each bar uses a separate theme-derived color.

Difficulty distribution

How the classified questions are distributed by difficulty.

Medium 29 48.3%
Easy 27 45%
Hard 4 6.7%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

Multiple Choices 23 38.3%
Subjective 22 36.7%
Numerical Answer Type (NAT) 15 25%

Subject weightage

Top subjects by unique question coverage.

Chemistry
60 Qs

Most asked topics

Top topics across the included previous year papers.

Physical Chemistry
60 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Some Basic Concepts Of Chemistry
60 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

JEE ADVANCED 2023 PAPER 1 ONLINE
1 Qs
JEE ADVANCED 2023 PAPER 2 ONLINE
1 Qs
JEE ADVANCED 2022 PAPER 1 ONLINE
1 Qs
JEE ADVANCED 2022 PAPER 2 ONLINE
1 Qs
JEE ADVANCED 2020 PAPER 1 OFFLINE
1 Qs
JEE ADVANCED 2020 PAPER 2 OFFLINE
1 Qs
JEE ADVANCED 2019 PAPER 2 OFFLINE
2 Qs
JEE ADVANCED 2018 PAPER 2 OFFLINE
1 Qs
JEE ADVANCED 2014 PAPER 1 OFFLINE
2 Qs
IIT JEE 2012 PAPER 1 OFFLINE
1 Qs
IIT JEE 2011 PAPER 1 OFFLINE
1 Qs
IIT JEE 2011 PAPER 2 OFFLINE
1 Qs
IIT JEE 2010 PAPER 1 OFFLINE
1 Qs
IIT JEE 2010 PAPER 2 OFFLINE
1 Qs
IIT JEE 2009 PAPER 1 OFFLINE
1 Qs
IIT JEE 2007 PAPER 2 OFFLINE
1 Qs
IIT JEE 2003 SCREENING
2 Qs
IIT JEE 2003
1 Qs
IIT JEE 2002 SCREENING
1 Qs
IIT JEE 2001 SCREENING
2 Qs
IIT JEE 1999
1 Qs
IIT JEE 1998
1 Qs
IIT JEE 1996
1 Qs
IIT JEE 1994
1 Qs
IIT JEE 1992
1 Qs
IIT JEE 1991
4 Qs
IIT JEE 1990
2 Qs
IIT JEE 1988
2 Qs
IIT JEE 1986
1 Qs
IIT JEE 1985
1 Qs
IIT JEE 1984
1 Qs
IIT JEE 1983
2 Qs
IIT JEE 1982
1 Qs
IIT JEE 1981
2 Qs
IIT JEE 1980
3 Qs
IIT JEE 1979
7 Qs
IIT JEE 1978
5 Qs

Included previous year papers

Newest papers appear first. Sort by year, question coverage or name.

PaperYear / sessionQuestions in this viewOpen
JEE ADVANCED 2023 PAPER 1 ONLINE20231View paper
JEE ADVANCED 2023 PAPER 2 ONLINE20231View paper
JEE ADVANCED 2022 PAPER 1 ONLINE20221View paper
JEE ADVANCED 2022 PAPER 2 ONLINE20221View paper
JEE ADVANCED 2020 PAPER 1 OFFLINE20201View paper
JEE ADVANCED 2020 PAPER 2 OFFLINE20201View paper
JEE ADVANCED 2019 PAPER 2 OFFLINE20192View paper
JEE ADVANCED 2018 PAPER 2 OFFLINE20181View paper
JEE ADVANCED 2014 PAPER 1 OFFLINE20142View paper
IIT JEE 2012 PAPER 1 OFFLINE20121View paper
IIT JEE 2011 PAPER 1 OFFLINE20111View paper
IIT JEE 2011 PAPER 2 OFFLINE20111View paper
IIT JEE 2010 PAPER 1 OFFLINE20101View paper
IIT JEE 2010 PAPER 2 OFFLINE20101View paper
IIT JEE 2009 PAPER 1 OFFLINE20091View paper
IIT JEE 2007 PAPER 2 OFFLINE20071View paper
IIT JEE 200320031View paper
IIT JEE 2003 SCREENING20032View paper
IIT JEE 2002 SCREENING20021View paper
IIT JEE 2001 SCREENING20012View paper
IIT JEE 199919991View paper
IIT JEE 199819981View paper
IIT JEE 199619961View paper
IIT JEE 199419941View paper
IIT JEE 199219921View paper
IIT JEE 199119914View paper
IIT JEE 199019902View paper
IIT JEE 198819882View paper
IIT JEE 198619861View paper
IIT JEE 198519851View paper
IIT JEE 198419841View paper
IIT JEE 198319832View paper
IIT JEE 198219821View paper
IIT JEE 198119812View paper
IIT JEE 198019803View paper
IIT JEE 197919797View paper
IIT JEE 197819785View paper

All Some Basic Concepts Of Chemistry previous year questions

Practice every matching question in batches of 20, with every available option.

1
1978 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1978
Naturally occurring boron consists of two isotopes whose atomic weighs are 10.01 and 11.01. The atomic weight of natural oron is 10.81. Calculate the percentage of each isotope in natural boron.
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2
1978 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1978
What weight of AgCl will be precipitated when a solution containing 4.77 g of NaCl is added to a solution of 5.77g of AgNO3?
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3
1978 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1978
Igniting MnO2 converts it quantitatively to Mn3O4. A sample of pyrolusite is of the following composition : MnO2 80%, SiO2 and other inert constituents 15%, rest being water. The sample is ignited in air to constant weight. What is the percentage of Mn in the ignited sample? [O = 16, Mn = 54.9]
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4
1978 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1978
27 g of Al will react completely with how many grams if oxygen?
A
8 g
B
16 g
C
32 g
D
24 g
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5
1978 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1978
A compound was found to contain nitrogen and oxygen in the ratio 28 gm and 80 gm respectively. The formula of compound is
A
NO
B
N2O3
C
N2O5
D
N2O4
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6
1979 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1979
5 ml of a gas containing only carbon and hydrogen were mixed with an excess of oxygen (30 ml) and the mixture exploded by means of an electric spark. After the explosion, the volume of the mixed gases remaining was 25 ml. On adding a concentrated solution of potassium hydroxide, the volume further diminished to 15 ml of the residual gas being pure oxygen. All volumes have been reduced to N.T.P. Calculate the molecular formula of the hydrocarbon gas.
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7
1979 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1979
4.215 g of a metallic carbonate was heated in a hard glass tube and the CO2 evolved was found to measure 1336 ml at 27oC and 700 mm pressure. What is the equivalent weight of metal?
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8
1979 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1979

Account for the following : Limit your answer to two sentences.

"Atomic weights of most of the elements are fractional."

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9
1979 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1979
The total number of electrons is one molecule of carbon dioxide is
A
22
B
44
C
66
D
88
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10
1979 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1979
A gaseous mixture contains oxygen and nitrogen in the ratio of 1 : 4 by weight. Therefore the ratio of their no of molecules is
A
1 : 4
B
1 : 8
C
7 : 32
D
3 : 16
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11
1979 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1979
The largest number of molecules is in
A
32 g of water
B
28 g of carbon monoxide
C
46 g of ethyl alcohol
D
54 g of nitrogen pentoxide
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12
1979 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1979
2.76 g of silver carbonate on being strongly heated yields a residue weighing
A
2.16 g
B
2.48 g
C
2.32 g
D
2.64 g
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13
1980 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1980
A mixture contains NaCl and unknown chloride MCl.

(i) 1g of this is dissolved in water. Excess of acidified AgNO3 solution is added to it. 2.567 g of white ppt is formed.

(ii) 1 g of original mixture is heated to 300oC. Some vapours come out which are absorbed in acidified AgNO3 solution, 1.341 g of white precipitate was obtained.

Find the molecular weight of unknown chloride.
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14
1980 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1980
(i). A sample of MnSO4.4H2O is strongly heated in air. The residue is Mn3O4.

(ii). The residue is dissolved in 100 ml of 0.1N FeSO4 containing dilute H2SO4.

(iii). The solution reacts completely with 50 ml of KMnO4 solution.

(iv). 25 ml of the KMnO4 solution used in step (iii) requires 30 ml of 0.1 N FeSO4 solution for complete reaction.

Find the amount of MnSO4.4H2O present in the sample.
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15
1980 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1980
The modern atomic unit is based on the mass of ______.
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16
1981 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1981
If 0.50 mol of BaCl2 is mixed with 0.20 mol of Na3PO4, the maximum amount of Ba3(PO4)2 that can be formed is
A
0.70
B
0.50
C
0.20
D
0.10
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17
1981 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1981
A 1.00 gm sample of H2O2 solution containing X percent H2O2 by weight requires X ml of a KMnO4 solution for complete oxidation under acidic conditions. Calculate the normality of the KMnO4 solution.
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18
1982 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1982
Hydroxylamine reduces iron (III) according to the equation:

2NH2OH + 4Fe3+ \(\to\) N2O(g) \(\uparrow\) + H2O + 4Fe2+ + 4H+

Iron (II) thus produced is estimated by titration with a standard permanganate solution. The reaction is :

\(MnO_4^-\) + 5Fe2+ + 8H+ \(\to\) Mn2+ + 5Fe3+ + 4H2O

A 10 ml sample of hydroxylamine solution was Diluted to 1 litre. 50 ml of this diluted solution was boiled with an excess of iron (III) solution. The resulting solution required 12 ml of 0.02 M KMnO4 solution for complete oxidation of iron (II). Calculate the weight of hydroxylamine in one litre of the original solution. (H = 1, N = 14, O = 16, K =39, Mn = 55, Fe = 56)
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19
1983 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1983
4.08 g of a mixture of BaO and an unknown carbonate MCO3 was heated strongly. The residue weighed 3.64 g. This was dissolved in 100 ml of 1 N HCl. The excess acid required 16 ml of 2.5 N NaOH solution for complete neutralization. Identify the metal M. (At wt. H = 1, C = 12, O = 16, Cl = 35.5, Ba = 138)
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20
1983 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1983
3 g of a salt of molecular weight 30 is dissolved in 250 g of water. The molality if the solution is _____.
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