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INDEX/CHAPTERS Page No.

DPP-1

BASIC CONCEPTS OF CHEMISTRY

C-1 – C-4

DPP-2

ATOMIC S TRUCTURE

C-5 – C-8

DPP-3

CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

DPP-4

CHEMICAL BONDING AND MOLECULAR STRUCTURE

DPP-5

STATES OF MATTER

C-17 – C-20

DPP-6

TH ER MODY NA MI CS

C-21 – C-24

DPP-7

EQUILI BRIUM

C-25 – C-28

DPP-8

REDOX REACTIONS

C-29 – C-32

DPP-9

H YDROGEN

C-33 – C-36

DPP-10

s-BLOCK ELEMENTS

C-37 – C-40

DPP-11

p-BLOCK ELEMENTS (Gp-13 &14)

C-41 – C-44

DPP-12

GENERAL ORGANIC CHEMISTRY

C-45 – C-48

H YDROCARB ON S

C-49 – C-52

DPP-14

ENVIRONMENTAL CHEMISTRY

C-53 – C-56

DPP-15

SOLID STATE

C-57 – C-60

DPP-16

SOLUTI ONS

C-61 – C-64

DPP-17

ELEC TROCHEMI STRY

C-65 – C-68

DPP-18

CHEMICAL KINETICS

C-69 – C-72

DPP-19

SUR FACE C HEMIS TRY

C-73 – C-76

DPP-20

GENERAL PRINCI PLES AND PROCESSES OF ISOLATION OF ELEMENTS

C-77 – C-80

DPP-21

THE p-BLOCK ELEMENTS (GROUP 15, 16, 17 & 18)

C-81 – C-84

DPP-22

THE d-AND F-BLOCK ELEMENTS

C-85 – C-88

DPP-23

COORDINATION COMPOUNDS

C-89 – C-92

DPP-24

HALOALKANES & HALOARENES

C-93 – C-96

DPP-25

ALCOHOLS, PHENOLS, ETHERS

C-97 – C-100

DPP-26

ALDEHYDES, KETONES

DPP-27

AMI NES

C-105 – C-108

DPP-28

BIOMOL ECULES

C-109 – C-112

DPP-29

POLYMERS

C-113 – C-116

DPP-30

CHEMISTRY IN EVERYDAY LIFE

C-117 – C-120

DPP-13

.

AND CARBOXYLIC ACIDS

Solutions To Chapter-wise DPP Sheets (1-30) DPP-29 DPP-30TEST FULL SYLLABUS MOCK

C-9 – C-12 C-13

– C-16

C-101 – C-104

S -1 – S -64

1-8 [b]

DPP - Daily Practice Problems Chapter-wise Sheets Date :

Start Time :

End Time :

CC01 SYLLABUS : Some Basic Concepts of Chemistry

Max. Marks : 120

Marking Scheme : + 4 for correct & (–1) for incorrect

Time : 60 min.

INSTRUCTIONS : This Daily Practice Problem Sheet contains 30 MCQ's. For each question only one option is correct. Darken the correct circle/ bubble in the Response Grid provided on each page.

1.

2.

In compound A, 1.00g of nitrogen unites with 0.57g of oxygen. In compound B, 2.00g of nitrogen combines with 2.24g of oxygen. In compound C, 3.00g of nitrogen combines with 5.11g of oxygen. These results obey the following law (a) law of constant proportion (b) law of multiple proportion (c) law of reciprocal proportion (d) Dalton’s law of partial pressure 1021 molecules are removed from 200 mg of CO2. The moles of CO2 left are :

RESPONSE GRID

1.

2.

3.

4.

(a) 2.88 × 10–3 (b) 28.8 × 10–3 –3 (c) 288 × 10 (d) 28.8 × 103 What volume of hydrogen gas, at 273 K and 1 atm. pressure will be consumed in obtaining 21.6 g of elemental boron (atomic mass = 10.8) from the reduction of boron trichloride by hydrogen ? (a) 67.2 L (b) 44.8 L (c) 22.4 L (d) 89.6 L Number of g of oxygen in 32.2 g Na2SO4.10 H2O is (a) 20.8 (b) 2.24 (c) 22.4 (d) 2.08

3. Space for Rough Work

4.

DPP/ CC01

C-2

5.

1020

6.02 × molecules of urea are present in 100 ml of its solution. The concentration of urea solution is (a) 0.02 M

(b) 0.01 M

(c) 0.001 M

(d) 0.1 M

11.

(Avogadro constant, NA = 6.02 × 1023 mol–1) 6.

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of the substance will (a) be a function of the molecular mass of the substance (b) remain unchanged (c) increase two fold (d) decrease twice

7.

8.

The weight of NaCl decomposed by 4.9g of H2SO4, if 6 g of sodium hydrogen sulphate and 1.825 g of HCl, were produced in the reaction is: (a) 6.921 g

(b) 4.65 g

(c) 2.925 g

(d) 1.4 g

A gas occupies a volume of 300 cc at 27°C and 620 mm pressure. The volume of gas at 47°C and 640 mm pressure is: (a) 260 cc

(b) 310 cc

(c) 390 cc

(d) 450 cc

(a) 6

(b) 1

(c) 2

(d) 4

(a) 250 ml

(b) 125 ml

(c) 100 ml

(d) 50 ml.

2Al(s) 6HCl(aq)

(c) 0.1 g of silver How many moles of magnesium phosphate, Mg3(PO4)2 will contain 0.25 mole of oxygen atoms? (a) 1.25 × 10–2

(b) 2.5 × 10–2

(c) 0.02

(d) 3.125 × 10–2

(b) 6 L HCl(aq) is consumed for every 3 L H2(g) produced (c) 33.6 L H2(g) is produced regardless of temperature and pressure for every mole Al that reacts (d) 67.2 H2(g) at STP is produced for every mole Al that reacts.

10. The density (in g mL–1) of a 3.60 M sulphuric acid solution that is 29% H2SO4 (molar mass = 98 g mol–1) by mass will be

6. 11.

2Al3 (aq) 6Cl (aq) 3H 2 (g)

(a) 11.2 L H2(g) at STP is produced for every mole HCl(aq) consumed

(d) 0.1 mole of oxygen gas

5. 10.

(d) 1.22

13. The volume of 20 volume H2O2 required to get 5 litres of O2 at STP is

6.023 × 1022 molecules of nitrogen

RESPONSE GRID

(c) 1.88

14. In the reaction,

(a) 0.2 mole of hydrogen gas

9.

(b) 1.64

12. Haemoglobin contains 0.33% of iron by weight. The molecular weight of haemoglobin is approximately 67200. The number of iron atoms (at. wt. of Fe = 56) present in one molecule of haemoglobin is

Which one of the following is the lightest? (b)

(a) 1.45

7. 12. Space for Rough Work

8. 13.

9. 14.

DPP/ CC01

C-3

15. The concentrated sulphuric acid that is peddled commercial is 95% H2SO4 by weight. If the density of this commercial acid is 1.834 g cm–3, the molarity of this solution is

On complete reaction with excess HCl, one kilogram of the washing soda will evolve:

(a) 17.8 M (b) 12.0 M (c) 10.5 M (d) 15.7 M 16. What is the mass of precipitate formed when 50 mL of 16.9% solution of AgNO3 is mixed with 50 mL of 5.8% NaCl solution ? (Ag = 107.8, N = 14, O = 16, Na = 23, Cl = 35.5) (a) 28 g (b) 3.5 g

(a) 9 mol of CO2

(b) 16 mol of CO2

(c) 17 mol of CO2

(d) 18 mol of CO2

(c) 7 g (d) 14 g 17. Number of valence electrons in 4.2 gram of N3– ion is (a) 4.2 NA (b) 0.1 NA (c) 1.6 NA (d) 3.2 NA 18. A transition metal M forms a volatile chloride which has a vapour density of 94.8. If it contains 74.75% of chlorine the formula of the metal chloride will be (a) MCl3 (b) MCl2 (c) MCl4 (d) MCl5 19. 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 20. Following is the composition of a washing soda sample : Substance

Molecular Wt.

Na2CO3 NaHCO3 NaCl

RESPONSE GRID

15. 20.

Mass percent

106.0 84.0

84.8 8.4

58.5

6.8

16. 21.

21. Arrange the numbers in increasing no. of significant figures. 0.002600, 2.6000, 2.6, 0.260 (a) 2.6 < 0.260 < 0.002600 < 2.6000 (b) 2.6000 < 2.6 < 0.002600 < 0.260 (c) 0.260 < 2.6 < 0.002600 < 2.6000 (d) 0.002600 < 0.260 < 2.6 < 2.6000 22. Dissolving 120 g of a compound (mol. wt. 60) in 1000 g of water gave a solution of density 1.12 g/mL. The molarity of the solution is: (a) 1.00 M

(b) 2.00 M

(c) 2.50 M

(d) 4.00 M

23. A gaseous compound of nitrogen and hydrogen contains 12.5% (by mass) of hydrogen. The density of the compound relative to hydrogen is 16. The molecular formula of the compound is: (a) NH2

(b) N3H

(c) NH3

(d) N2H4

24. The amount of BaSO4 formed upon mixing 100 mL of 20.8% BaCl2 solution with 50 mL of 9.8% H2SO4 solution with 50 mL of 9.8% H2SO4 solution will be: (Ba = 137, Cl = 35.5, S = 32, H = 1 and O = 16) (a) 23.3 g

(b) 11.65 g

(c) 30.6 g

(d) 33.2 g

17. 22. Space for Rough Work

18. 23.

19. 24.

DPP/ CC01

C-4

25. 2 g of a mixture of CO and CO2 on reaction with excess I2O5 produced 2.54 g of I 2 . What will be the mass % of CO2 in the original mixture ? (a) 35 (b) 70 (c) 30 (d) 60 26. 7.5 grams of a gas occupy 5.6 litres of volume at STP. The gas is (a) N2O (b) NO (c) CO (d) CO2 27. Number of moles of KMnO4 required to oxidize one mole of Fe(C2O4) in acidic medium is (a) 0.167 (b) 0.6 (c) 0.2 (d) 0.4 28. What is the weight of oxygen required for the complete combustion of 2.8 kg of ethylene ?

RESPONSE GRID

25. 30.

26.

(a) 2.8 kg (b) 6.4 kg (c) 9.6 kg (d) 96 kg 29. A gas mixture of 3 litres of propane (C3H 8 ) and butane (C 4 H10 ) on complete combustion at 25° C produced 10 litre CO 2 . Find out the composition of gas mixture (Propane : Butane) (a) 2 : 1 (b) 1 : 2 (c) 1.5 : 1.5 (d) 0.5 : 2.5 30. An organic compound contains 49.3% carbon, 6.84% hydrogen and its vapour density is 73. Molecular formula of the compound is : (a)

C 3H 5O 2

(b) C 4 H10 O 2

(c)

C 6 H10 O 4

(d) C 3H10 O 2

27.

28.

29.

DAILY PRACTICE PROBLEM DPP CHAPTERWISE 1 - CHEMISTRY Total Questions 30 Total Marks 120 Attempted Correct Incorrect Net Score Cut-off Score 37 Qualifying Score 52 Success Gap = Net Score – Qualifying Score Net Score = (Correct × 4) – (Incorrect × 1) Space for Rough Work

DPP - Daily Practice Problems Chapter-wise Sheets Date :

Start Time :

End Time :

CC02 SYLLABUS : Structure of Atom

Max. Marks : 120

Marking Scheme : + 4 for correct & (–1) for incorrect

Time : 60 min.

INSTRUCTIONS : This Daily Practice Problem Sheet contains 30 MCQ's. For each question only one option is correct. Darken the correct circle/ bubble in the Response Grid provided on each page.

1.

2.

Among the following groupings which represents the collection of isoelectronic species? (a)

NO , C 22 , O 2 , CO

(c)

CO, NO , CN , C 22 (d) NO, CN , N 2 , O 2

(b) N 2 , C 22 , CO, NO

The compound in which cation is isoelectronic with anion is : (a) NaCl (b) CsF (c) NaI (d) K2S

RESPONSE GRID

1.

3.

2.

4.

The de-Broglie wavelength of an electron in the ground state of hydrogen atom is : [K.E. = 13.6 eV; 1eV = 1.602 10 19 J] (a) 33.28 nm (b) 3.328 nm (c) 0.3328 nm (d) 0.0332 nm The frequency of light emitted for the transition n = 4 to n = 2 of the He+ is equal to the transition in H atom corresponding to which of the following ? (a) n = 2 to n = 1 (b) n = 3 to n = 2 (c) n = 4 to n = 3 (d) n = 3 to n = 1

3. Space for Rough Work

4.

DPP/ CC02

C-6

5.

The first emission line in the atomic spectrum of hydrogen in the Balmer series appears at

6.

7.

8.

9R cm 400

7R cm 1 144 5R 3R cm 1 cm 1 (c) (d) 36 4 In hydrogen atomic spectrum, a series limit is found at 12186.3 cm–1. Then it belong to (a) Lyman series (b) Balmer series (c) Paschen series (d) Brackett series Two fast moving particles X and Y are associated with de Broglie wavelengths 1 nm and 4 nm respectively. If mass of X in nine times the mass of Y, the ratio of kinetic energies of X and Y would be (a) 3 : 1 (b) 9 : 1 (c) 5 : 12 (d) 16 : 9 The ratio of magnetic moments of Fe(III) and Co(II) is (a) 7 : 3 (b) 3 : 7

(a)

(c)

1

(b)

7 : 3

(d)

3 :

7

The values of Planck's constant is 6.63 × 10–34 Js. The velocity of light is 3.0 × 108 m s–1. Which value is closest to the wavelength in nanometres of a quantum of light with frequency of 8 × 1015 s–1? (a) 5 × 10–18 (b) 4 × 101 7 (c) 3 × 10 (d) 2 × 10–25 10. Li and a proton are accelerated by the same potential, their de Broglie wavelengths Li and p have the ratio (assume mLi = 9mp) (a) 1 : 2 (b) 1 : 4 9.

(d) 1 : 3 3

(c) 1 : 1

RESPONSE GRID

11.

5. 10.

6. 11.

Energy levels, A, B, C, of a certain atom correspond to increasing values of energy i.e., EA < EB < EC. If 1, 2, 3 are the wave lengths of radiations corresponding to the transition from C to B, B to A and C to A respectively, which of the following statements is correct ? C 1

B 2

3

A

(a) (c)

3= 1+ 2 1+ 2+ 3=0

(b)

3

(d)

2 3

1 2 1

2

2 1

2 2

12. If uncertainty in position and momentum are equal, then uncertainty in velocity is : 1 h h (b) 2m 2 h 1 h (d) (c) m 13. The electrons, identified by quantum numbers n and l (i) n = 4, l = 1 (ii) n = 4, l = 0 (iii) n = 3, l = 2 (iv) n = 3, l = 1 can be placed in order of increasing energy, from the lowest to highest, as (a) (iv) < (ii) < (iii) < (i) (b) (ii) < (iv) < (i) < (iii) (c) (i) < (iii) < (ii) < (iv) (d) (iii) < (i) < (iv) < (ii) 14. Ionisation energy of He+ is 19.6 × 10–18 J atom–1. The energy of the first stationary state (n = 1) of Li2+ is (a) 4.41 × 10–16 J atom–1 (b) –4.41 × 10–17 J atom–1 (c) –2.2 × 10–15 J atom–1 (d) 8.82 × 10–17 J atom–1 (a)

7. 12. Space for Rough Work

8. 13.

9. 14.

DPP/ CC02

C-7

15. The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is [ a0 is Bohr radius] : (a) (c)

h2 4

2

(b)

ma02

h2 32

2

(d)

ma02

16

2

ma02

(c)

h2 64

2

18

J

Z2 n2

.

(b) 2.816 × 10.–7 m (d) 8.500 × 10–7 m

17. If the nitrogen atom had electronic configuration 1s7 it would have energy lower than that of the normal ground state configuration 1s2 2s2 2p3 because the electrons would be closer to the nucleus. Yet 1s7 is not observed. It violates (a) Heisenberg’s uncertainty principle (b) Hund’s rule (c) Pauli exclusion principle (d) Bohr postulate of stationary orbits 18. In a hydrogen atom, if energy of an electron in ground state is 13.6. ev, then that in the 2nd excited state is (b) 3.4 eV (d) 13.6 eV.

19. Of the following sets which one does NOT contain isoelectronic species?

RESPONSE GRID

15. 20.

16. 21.

CN , N 2 , C 22

(d) PO 34 , SO 24 , ClO 4

ma02

Wavelength of light required to excite an electron in an hydrogen atom from level n = 1 to n = 2 will be : (h = 6.62 × 10 –34 Js and c = 3.0 × 108 ms–1)

(a) 1.51 eV (c) 6.04 eV

BO 33 , CO 32 , NO 3

(b) SO32 , CO32 , NO3

h2

16. Energy of an electron is given by E = – 2.178 × 10

(a) 1.214 × 10–7 m (c) 6.500 × 10–7 m

(a)

20. The ionization enthalpy of hydrogen atom is 1.312 × 106 J mol–1. The energy required to excite the electron in the atom from n = 1 to n = 2 is (a) 8.51 × 105 J mol–1 (b) 6.56 × 105 J mol–1 (c) 7.56 × 105 J mol–1 (d) 9.84 × 105 J mol–1 21. The limiting line in Balmer series will have a frequency of (Rydberg constant, R = 3.29 × 1015 cycles/s) (a) 8.22 × 1014 s–1 (b) 3.29 × 1015 s–1 (c) 3.65 × 1014 s–1 (d) 5.26 × 1013 s–1 22. The energy required to break one mole of Cl – Cl bonds in Cl2 is 242 kJ mol–1. The longest wavelength of light capable of breaking a single Cl – Cl bond is (c = 3 × 108 ms–1 and NA = 6.02 × 1023 mol–1). (a) 594 nm (b) 640 nm (c) 700 nm (d) 494 nm 23. The de Broglie wavelength of a car of mass 1000 kg and velocity 36 km/hr is : (a) 6.626 × l0–34 m (b) 6.626 × 10–38 m (c) 6.626 × 10–31 m (d) 6.626 × 10– 30 m 24. If the radius of first orbit of H atom is a0, the de-Broglie wavelength of an electron in the third orbit is (a) 4 a0 (b) 8 a0 (c) 6 a0 (d) 2 a0

17. 22. Space for Rough Work

18. 23.

19. 24.

DPP/ CC02

C-8

25. Which of the following radial distribution graphs correspond to = 2 for the H atom ? (a)

(b)

(c)

(c)

1 2 1 5,1,1, 2

1 2 1 (d) 5, 0,1, 2

5, 0, 0,

RESPONSE GRID

(b) 5,1, 0,

25. 30.

(a)

2h m

(c)

2hc m

o

o o

(b)

2hc m

(d)

2h m

o

1

1

o

29. If m and e are the mass and charge of the revolving electron in the orbit of radius r for hydrogen atom, the total energy of the revolving electron will be:

(d)

26. If the kinetic energy of an electron is increased four times, the wavelength of the de-Broglie wave associated with it would become (a) one fourth (b) half (c) four times (d) two times 27. The correct set of four quantum numbers for the valence electrons of rubidium atom (Z = 37) is: (a)

28. If o and be threshold wavelength and wavelength of incident light, the velocity of photoelectron ejected from the metal surface is:

26.

(a)

1 e2 2 r

(b)

e2 r

me2 1 e2 (d) 2 r r 30. The dissociation energy of H2 is 430.53 KJ mol –1 . If hydrogen is dissociated by illumination with radiation of wavelength 253.7 nm the fraction of the radiant energy which will be converted into kinetic energy is given by (a) 100% (b) 8.76% (c) 2.22% (d) 1.22%

(c)

27.

28.

29.

DAILY PRACTICE PROBLEM DPP CHAPTERWISE 2 - CHEMISTRY Total Questions 30 Total Marks 120 Attempted Correct Incorrect Net Score for Rough Work Score Cut-off Score 37 Space Qualifying 51 Success Gap = Net Score – Qualifying Score Net Score = (Correct × 4) – (Incorrect × 1) Space for Rough Work

DPP - Daily Practice Problems Chapter-wise Sheets Date :

Start Time :

End Time :

CC03 SYLLABUS : Classification of Elements and Periodicity in Properties

Max. Marks : 120

Marking Scheme : + 4 for correct & (–1) for incorrect

Time : 60 min.

INSTRUCTIONS : This Daily Practice Problem Sheet contains 30 MCQ's. For each question only one option is correct. Darken the correct circle/ bubble in the Response Grid provided on each page.

1.

2.

The correct sequence which shows decreasing order of the ionic radii of the elements is (a) Al3 Mg 2 Na F O2 2 3 2 (b) Na Mg Al O F 2 2 (c) Na F Mg O Al3 2 2 (d) O F Na Mg Al3 The van der Waal and covalent radii of fluorine atom respectively from the following figure are.

3.

294 pm

4. F

F 144 pm

RESPONSE GRID

1.

F

F 144 pm

2.

(a) 219pm, 72pm (b) 75pm, 72pm (c) 147pm, 72pm (d) 147pm, 144pm Arrange the following in increasing order of ionic radii? C4–,N3–,F–,O2– (a) C4– < N3– < O2– < F– (b) N3– < C4– < O2– < F– (c) F–< O2– < N3– < C4– (d) O2– < F– < N3– < C4– Which is not the correct order for the stated property. (a) Ba > Sr > Mg ; atomic radius (b) F > O > N ; first ionization enthalpy (c) Cl > F > I ; electron affinity (d) O > Se > Te ; electronegativity

3. Space for Rough Work

4.

DPP/ CC03

C-10

5.

In which of the following arrangements, the order is NOT according to the property indicated against it? (a) Li < Na < K < Rb : Increasing metallic radius (b) I < Br < F < Cl : Increasing electron gain enthalpy (with negative sign) (c) B < C < N < O Increasing first ionization enthalpy (d)

6.

7.

8.

9.

Al3

Mg 2

Na

5. 10.

(a) O

2

(b) F (c) O

F

F

O

2

F

O

O 2

O

F

the order

F

2

11.

(d) O F O F Which of the following has the maximum number of unpaired electrons? (a) Mg2+ (b) Ti3+

F

Increasing ionic size The symbol and IUPAC name for the element with atomic number 120, respectively are (a) Ubn and unbinilium (b) Ubn and unbiunium (c) Ubn and unnibium (d) Ubn and unnilium Sequence of acidic character is (a) N2O5 > SO2 > CO > CO2 (b) N2O5 > SO2 > CO2 > CO (c) SO2 > CO2 > CO > N2O5 (d) SO2 > N2O5 > CO > CO2 The correct order of ionization energy for carbon, nitrogen and oxygen atoms is: (a) C > N > O (b) C > N < O (c) C < N > O (d) C < N < O Which of the following order is wrong? (a) NH3 < PH3 < AsH3 – Acidic (b) Li < Be < B < C – First IP (c) Al2O3 < MgO < Na2O < K2O – Basic (d) Li+ < Na+ < K+ < Cs+ – Ionic radius

RESPONSE GRID

10. The radii of F,

F–, O and O2– are in

6. 11.

(c) V3+ (d) Fe2+ 12. The incorrect statement among the following is (a) The first ionization potential of Al is less than the first ionization potential of Mg (b) The second ionization potential of Mg is greater than the second ionization potential of Na (c) The first ionization potential of Na is less than the first ionization potential of Mg (d) The third ionization potential of Mg is greater than the third ionization potential of Al. 13. According to the Periodic Law of elements, the variation in properties of elements is related to their (a) nuclear masses (b) atomic numbers (c) nuclear neutron-proton number ratios (d) atomic masses 14. Identify the correct order of the size of the following: (a) Ca2+ < K+ < Ar < Cl– < S2– (b) Ar < Ca2+ < K+ < Cl– < S2– (c) Ca2+ < Ar < K+ < Cl– < S2– (d) Ca2+ < K+ < Ar < S2– < Cl–

7. 12. Space for Rough Work

8. 13.

9. 14.

DPP/ CC03

C-11

15. Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which of these statements gives the correct picture? (a) Chemical reactivity increases with increase in atomic number down the group in both the alkali metals and halogens (b) In alkali metals the reactivity increases but in the halogens it decreases with increase in atomic number down the group (c) The reactivity decreases in the alkali metals but increases in the halogens with increase in atomic number down the group (d) In both the alkali metals and the halogens the chemical reactivity decreases with increase in atomic number down the group 16. In which of the following arrangements, the sequence is not strictly according to the property written against it? (a) HF < HCl < HBr , HI : increasing acid strength (b) NH3 < PH3 < AsH3 Cl > Br > I (b) Cl > F > Br > I (c) Br > Cl > I > F (d) I > Br > Cl > F

RESPONSE GRID

15. 20.

16. 21.

19. Which one of the following has largest ionic radius? (b) O 22

(a) Li+

(d) F– B3 Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for C, Ca, Al, F and O? (a) Ca < Al < C < O < F (b) Al < Ca < O < C < F (c) Al < O < C < Ca < F (d) C < F < O < Al < Ca Which of the following elements represents highly electropositive as well as highly electronegative character in its period? (a) Hydrogen (b) Nitrogen (c) Fluorine (d) None of these Which one of the following ions has the highest value of ionic radius ? (a) O2– (b) B3+ + (c) Li (d) F– Among Al2O3, SiO2, P2O3 and SO2 the correct order of acid strength is (a) Al2O3 < SiO2< SO2 < P2O3 (b) SiO2< SO2 < Al2O3 < P2O3 (c) SO2< P2O3 < SiO2 < Al2O3 (d) Al2O3 < SiO2< P2O3 < SO2 Which of the following arrangements represents the increasing order (smallest to largest) of ionic radii of the given species O2–, S2–, N3–, P3–? (a) O2– < N3– < S2– < P3– (b) O2– < P3– < N3– < S2– (c) N3 < O2– < P3– < S2– (d) N3– < S2– < O2– < P3– (c)

20.

21.

22.

23.

24.

17. 22. Space for Rough Work

18. 23.

19. 24.

*RKC0002745730*