Brilliant STUDY CENTRE Repeaters JEE ADV.

) PART I - CHEMISTRY

CHAPTER - 01
SOME BASIC CONCEPT OF CHEMISTRY

(WORK BOOK)
1. How many moles of lead (II) chloride will be formed from a reaction between 6.5g of PbO and 3.2g of
HCl? [At. wt. Pb = 207g]
A) 0.044 B) 0.333 C) 0.077 D) 0.029
2. A silicon (at. wt. = 28) chip used in an integrated circuit of a computer has a mass of 5.68 mg. How
may silicon atoms are present in this chip?

A) 2.02  10 4 B) 12.2  10 20 C) 122  10 20 D) 1.22  10 20

3. Haemoglobin contains 0.25% iron by weight. The molecular wt. of haemoglobin is 89600. The no. of
iron atoms per molecule is (At. wt. of iron = 55.84)
A) 40 B) 25 C) 1 D) 4
4. In a compound C,H and N atoms are present in 9 : 1 : 3.5 by weight. Mol wt . of compound is 108, its
mol.formula is
A) C2H6N2 B) C3H4N C) C6H8N2 D) C9H12N3
5. Crystals of which pair are isomorphous ?
A) ZnSO4, SnSO4 B) MgSO4, CaSO4
C) ZnSO4, MgSO4 D) PbSO4, NiSO4
6. The volume at STP of pure O2 necessary for the complete combustion of 12 g of magnesium of
atomic weight 24 is:
A) 22.4 dm3 B) 11.2 dm3 C) 5.6 dm3 D) 12 dm3
7. An unknown element forms an oxide. What will be the equivalent weight of the element if the oxygen
content is 20% by weight?
A) 8 B) 16 C) 24 D) 32
8. Which among the following statements is correct?
A) 1 mol of electron has 1.6 × 10-19 C of charge B) 1 mol of electron has .16 × 10-19 C of charge
C) 1 mol of electron weighs 0.54 Kg D) 1 mol of electron weighs 0.54 mg
9. The number of oxalic acid molecules in 100 mL of 0.02 N oxalic acid is
A) 12.05 × 1023 B) 12.05 × 1020 C) 12.05 × 1021 D) 6.023 × 1020

1
 Brilliant STUDY CENTRE Repeaters (JEE ADV.) PART I - CHEMISTRY

10. An aqueous solution of 6.3 g of oxalic acid dihydrate is made up of 250 mL. The volume of 0.1 N
NaOH required to completely neutralize 10 mL of this solution is
A) 20 mL B) 10 mL C) 5 mL D) 40 mL

11. The set of numerical coefficients that balances the equation K2CrO4 + HCl 
 K2Cr2O7 + KCl + H2O
is
A) 1, 1, 2, 2, 1 B) 2, 2, 1, 1, 1 C) 2, 1, 1, 2, 1 D) 2, 2, 1, 2, 1
12. To 100 ml CaCl2 solution containing 6.66g CaCl2, 100 ml of 0.5M Na3PO4 solution is added. The mass
of Ca3(PO4)2 precipitated would be ?
A) 4.2 g B) 5.0 g C) 6.2 g D) 7.6 g
13. A 100% pure sample of a divalent metal carbonate weighing 2g on complete thermal decomposition
releases 448 mL of carbondioxide at STP. The equivalent mass of the metal is:
A) 40 B) 20 C) 28 D) 12
14. A gaseous hydrocarbon gives upon combustion 0.72 g of water and 3.08 g of CO2. The empirical
formula of the hydrocarbon is:
A) C2H4 B) C3H4 C) C6H5 D) C7H8
15. 10 mL of 2(M) NaOH solution is added to 200 mL of 0.5 (M) of NaOH solution. What is the final
concentration of the resultant solution?
A) 0.57 (M) B) 5.7 (M) C) 11.4 (M) D) 1.14 (M)
16. A sample of PCl3 contains 1.4 moles of the substance. How many atoms are there in the sample?
A) 4 B) 5.6 C) 8.431 x 1023 D) 3.372 x 1024
17. The average molar mass of naturally occurring Argon. Calculated using the following data is
Isotope : Isotopic molar mass : Abundance
36Ar 35.96755 g.mol–1 0.337%
38Ar 37.96272 g. mol–1 0.063%
40Ar 39.9624 g.mol–1 99.600%
A) 39.2 gmol–1 B) 39.948 gmol–1 C) 38.948 gmol–1 D) 37.948 gmol–1
18. In a reaction vessel 0.184 g of NaOH is required to be added for completing the reaction. Howmany
millilitres of 0.150 M NaOH should be added for this requirement?
A) 30.7 mL B) 60 mL C) 15.6 mL D) 90.2 mL
19. In an eperiment 2.4 g of iron oxide on reduction with hydrogen gave 1.68 g of iron. In another experi-
ment, 2.9g of iron oxide gave 2.09 g of iron on reduction. Which law is illustrated from the data?
A) Law of constant proportions B) Law of multiple proportions
C) Law of reciprocal proportions D) Law of conservation of mass
20. Chlorine gas is prepared by reaction of H2SO4 with MnO2 and NaCl. What volume of Cl2 will be
produced at STP if 50 g of NaCl react with excess amount of MnO2 and H2SO4?
A) 1.915L B) 22.4 L C) 11.2 L D) 9.57 L

2
 Brilliant STUDY CENTRE Repeaters JEE ADV.) PART I - CHEMISTRY

21. 1.12 mL of a gas is produced at STP by the action of 4.12 mg of alcohol, ROH, with methylmagnesium
iodide. The molecular mass of alcohol is
A) 16 u B) 41.2 u C) 82.4 u D) 156 u
22. The molecular formula of the oxide of iron in which mass percentage of iron is 69.0
A) FeO B) Fe2O3 C) Fe3O3 D) Fe3O4
23. A mixture of ethane and ethene occupied 41 L at 1 atm and 500 K. The mixture reacts completely with
10
mol of O2 to produce CO2 and H2O. The number of moles of ethane in the mixture is
3
A) 0.33 B) 0.77 C) 0.67 D) 0.8
24. In an experiment, 4g of M2Ox(oxide) was reduced to 2.8g of the metal. If the atomic mass of metal is
56, the number of oxygen atoms in the oxide is
A) 1 B) 2 C) 3 D) 4
25. The most abundant elements in the body of a healthy human adult are: Oxygen (61.4%), Carbon
(22.9%), Hydrogen (10%) and nitrogen (2.6%). The weight which a 75 kg person would gain if all 1H
atoms are replaced by 2H atoms is
A) 7.5 kg B) 10 kg C) 15 kg D) 37.5 kg

26. Two elements X and Y combines to form two compounds XY2 and X 3 Y2 0.1 mol of XY2 weighs 10g
and 0.05 mol of X3Y2 weighs 9g, the atomic weights of X and Y are respectively
A) 40, 30 B) 60, 40 C) 20, 30 D) 30, 20
27. 10 ml of a gaseous hydrocarbon were mixed with 100 ml of oxygen and exploded in a eudiometre
tube. The volume of residual gases was 95 ml of which 20 ml was absorbed by caustic soda and the
remainder by pyragallol. The molecular formula of the hydrocarbon is
A) C2H4 B) C2H2 C) C2H6 D) C3H6
28. The amount of Arsenic pentasulphide that can be obtained when 35.5 g of arsenic acid treated with
excess H2S in the presence of conc. HCl (assuming 100% conversion) is
A) 0.25 mol B) 0.5 mol C) 0.333 mol D) 0.125 ml
29. Which of the following is not an element :
A) Diamond B) Graphite C) Silica D) Ozone

1
30. An atom is 10 times heavier than of mass of the carbon atom. The atomic mass is :
12 th
A) 10 u B) 120 u C) 1.2 u D) 12 u
31. If the average atomic mass of an element having two isotopes is 71, the ratio of the natural abundance
of the two isotopes of mass 70 and 74 will be
A) 4:1 B) 3:1 C) 5:1 D) 6:1
32. The number of moles of electrons which weigh one kg is

1 23 6.02  1054 108

B) 9.108  10
23
A) 6.02  10 C) D) 9.108  6.02
9.108

3
 Brilliant STUDY CENTRE Repeaters (JEE ADV.) PART I - CHEMISTRY

33. The volume occupied by one molecule of water (density = 1 gcm–3)

A) 18 cm3 B) 22400 cm3 C) 6.02 x 10–23 cm3 D) 3 x 10–23 cm3
34. A sulphur containing organic compound contain 40% sulphur. The minimum molecular mass of the
organic compound is
A) 200 u B) 210 u C) 220 u D) 80 u
35. If the vapour density of a gas with respect to methane is 2, molecular mass of the gas will be
A) 4 u B) 16 u C) 8 u D) 32 u
36. 4.4 g of CO2 and 2.24 L H2 and STP are mixed in a container. The total number of molecules present
in the container will be
A) 6.022 × 1023 B) 1.2044 × 1023 C) 12.044 × 1023 D) 6.022 × 1024
More than one correct answer type questions
37. Which of the following statement regarding Avogadro’s number is/are true
A) It is equal to 6.023 × 1023
B) It is the number of atoms present exactly in 12 g of C -12 isotope
C) It is the number of atoms present in 1.0 mole of any substance
D) It is the number of deuterium present in its 2 g
38. Which statements are wrong regarding concentration methods used in solution ?
A) Molarity and normality are temperature dependent
B) Molarity of water in its 1 L is 27.25 M
C) 1 M HCl solution has a normality of 1 N
D) ppm is also known as  gL-1
39. 20 g of CaCO3 is reacted with 20 g of HCl, then
A) HCl is limiting reagent B) CaCO3 is limiting reagent
C) Amount of CO2 produced is 8.89 D) Amount of CO2 produced is 88 g
40. Which of the following measures 11.2 L at STP ?
A) 35.5 g of Cl2 gas B) 1 g of H2 gas
C) 22 g of CO2 gas D) 16 g of O2 gas
41. 1 g Mg was burnt in a closed vessel containing 2 g oxygen. Which of the following statements are not
correct ?
A) 0.25 g Mg left unburnt B) 1.33 g O2 left unreacted
C) 2.5 g Mg will be formed D) The mixture at the end will weigh 3 g
Integer type questions
42. In an experiment 4 g of M2Ox oxide was reduced to 2.8 g of the metal. If the atomic mass of the metal
is 56 g mol-1, the number of O atoms in the oxide is
43. 0.3 g of an acid is neutralised by 40 cm3 of 0.125 N NaOH. Equivalent mass of the acid is ( divide the
answer by 10)

4
 Brilliant STUDY CENTRE Repeaters JEE ADV.) PART I - CHEMISTRY

44. For a reaction A  2B  C , the amount of C formed by starting the reaction with 5 moles of A and 8
moles of B is
45. Silver (At wt. 108 g/mol) has a density of 10.9 cm-3. The number of silver atoms ina surface of area
10-12 m2 can be expressed in scientific notation as y × 10x. Find the value of x.
46. 3g of activated charcoal was added to 50 ml of acetic acid solution (0.06 N) in a flask after an hour it
was filtered and the strength of the filtrate was found to be 0.042 N. The amount of acetic acid
adsorbed (per gram of charcoal) is
Passage type
47. 24 g pure sample of magnesium is burned in air to form magnesium oxide and magnesium nitride.
When products are treated with excess of H2O, 3.4 g of gaseous NH3 is generated according to given
reaction

Mg  O 2  MgO

Mg  N 2  Mg 3 N 2

Mg 3 N 2  6H 2 O  3Mg  OH  2  2NH 3

1. Calculate the amount of magnesium oxide (in g) in products

A) 28 B) 20 C) 16.8 D) 32
2. Calculate the amount of Mg(OH)2 (in g) produced in the above reaction
A) 11.6 B) 17.4 C) 23.2 D) 15.8
3. Calculate the mass % of Mg converted into Mg3N2
A) 20 B) 30 C) 35 D) 40
Matrix match
48. Column I (law) Column II
A) Law of conservation of mass P) Ritcher
B) Law of constant proportion Q) Dalton
C) Law of multiple proportion R) Proust
D) law of recipocal proportion S) Lavoisier
T) Mendeleev
49. Column I Column II
A) Mole fraction P) Volume is included
B) Molarity Q) Temperature dependent
C) Molality R) Temperature independent
D) Normality S) its sum is always equal to 1 in solution
T) Mass of solvent is included

5
 Brilliant STUDY CENTRE Repeaters (JEE ADV.) PART I - CHEMISTRY

50. Column I Column II

A) 1g ion of Na+ P) 6.02 × 1024 electrons
B) 23 g of Na Q) 7.224 × 1024 neutrons
C) 1 g ion of Mg2+ R) 6.02 × 1023 × 2 × 1.6 × 10-19 columb charge
D) 24 g of Mg S) 7.224 × 1024 proton

6
 Brilliant STUDY CENTRE Repeaters JEE ADV.) PART I - CHEMISTRY

CHAPTER - 01
SOME BASIC CONCEPT OF CHEMISTRY

WORK BOOK

1. D 13. B 25. A 37. A, B, D 48. A-S

2. D 14. D 26. A 38. B, D B-R
3. D 15. A 27. B 39. B, C C-Q
4. C 16. D 28. D 40. A, B, C, D D-P
5. A 17. B 29. C 41. A,C 49. A - R,S,T
6. C 18. A 30. A 42. 3 B - P, Q
7. D 19. A 31. B 43. 6 C - R,T
8. D 20. D 32. D 44. 4 D - P,Q
9. D 21. C 33. D 45. 7 50. A - P,Q
10. D 22. B 34. D 46. 18 B-Q
11. D 23. C 35. D 47. 1. A C - P,Q,R,S
12. C 24. C 36. B 2. B D - Q,S
3. B