Code No 215 Rs 110/-By : Dr Vijay Agarwal

1. The radius of the nucleus is related to the mass number A by—

(A) R = R₀A1/2 _{(B) R = R} 0A

2. The correct ground state configuration of chromium atom (At. No. = 24) is—

(A) [Ar] 3d5₄_s1

(B) [Ar] 3d4₄_s2

(D) [Ar] 4d5₄_s1

3. Which of the following species has the highest ionisation energy ?

(A) Li+ _{(B) Mg}+

6C in upper atmosphere is

generated by true nuclear reaction— (A) 14 7N + 1 1H → 14 6C + 0 + 1e + 1 1H (B) 14 7N → 14 6C + 0 + 1e (C) 14 7N + 1 0n → 14 6C + 1 1H (D) 14 7N + 1 1H → 11 6C + 4 2He

5. As per the modern periodic law the physical and chemical pro- perties of elements are periodic function of their—

(A) Atomic volume

(B) Electronic configuration (C) Atomic weight

(D) Atomic size

6. How many kinds of space lattices are possible in a crystal ?

(A) 23 (B) 7

7. The pH of a solution is increased from 3 to 6. Its H+_{ion concentra-}

tion will be— (A) Reduced to half (B) Doubled

8. A mixture of camphor and ben- zoic acid can be easily separated by—

(A) Sublimation

(B) Extraction with solvent (C) Fractional crystallisation (D) Chemical method

9. Silver chloride dissolves in excess of NH₄OH. The cation present in this solution is— (A) Ag+

(B) [Ag(NH₃)₂]+ (C) [Ag(NH₃)₄]+

(D) [Ag(NH₃)₆]+ 10. The IUPAC name for

OHC—CH₂—COOH— (A) Prop-1-al-3-oic acid (B) Prop-3-al-1-oic acid (C) 2-formylethanoic acid (D) 2-carboxy ethanal 11. Be2+_{is isoelectronic with—} (A) Mg2+ _{(B) Na}+ (C) Li+ _{(D) H}+

12. Resonance structure of molecule does not have—

(A) Identical arrangement of atoms

(B) Nearlythe same energy con- tent

(D) Identical bonding 13. The cell reaction of a cell is

Mg_(s) + Cu2+ (aq)

→

Cu_(s) + Mg2+ (aq)

If the standard reduction poten- tials of Mg and Cu are –2·37 and + 0·34 V respectively. The EMF of the cell is—

(A) + 2·03 V (B) – 2·03 V (C) + 2·71 V (D) – 2·71 V 14. A mixture of ethyl iodide and n-

propyl iodide is subjected to Wurtz reaction. The hydrocarbon that will not be formed is— (A) n-butane (B) n-propane

15. 4·5 mole each of H₂ and I₂ are heated in a sealed ten litre vessel. At equilibrium 3 mole of HI were found. The equilibrium constant for

H₂ + I₂ 2HI is—

(A) 1 (B) 10

16. Ethyl bromide can be converted into ethyl alcohol by—

(A) Heating with dil. hydrochloric acid and Zn

(B) Boiling with an alcoholic solution of KOH

(D) Refluxing methanol 17. Mortar is a mixture of—

(A) Plaster of paris + Silica (B) Slaked lime +

Plaster of paris + H₂O (C) CaCO₃ + Silica + H₂O (D) Slaked lime + Silica + H₂O 18. Chlorination of toluene in pre-

sence of light and heat followed by treatment with aqueous NaOH gives—

(A) o-cresol

(B) p-cresol

19. The number of moles of AgCl precipitated when excess of AgNO₃ is added to one mole of [Cr(NH₃)₄Cl₂]Cl is—

(A) Zero (B) 1·0 (C) 2·0 (D) 3·0

20. 23 g of Na will react with methyl alcohol to give—

(A) One mole of oxygen (B) One mole of hydrogen (C) 1

2 mole of hydrogen (D) None of these

21. A mixture contains four solid organic compounds A, B, C and D. On heating only C changes from solid to vapour state. C can be separated from rest in the mixture by—

(A) Distillation (B) Sublimation

22. The compound which gives silver mirror with Tollen’s reagent is— (A) Glucose

(B) Acetaldehyde (C) Both (A) and (B) (D) None of these

23. The homologue of ethyne is— (A) C₂H₄ (B) C₂H₆ (C) C₃H₈ (D) C₃H₆ 24. Under Wolf-Kishner reduction

conditions, the conversion which may be brought about is— (A) Benzaldehyde into benzyl

alcohol

(B) Cyclohexanolintocyclohexa- none

(D) Benzophenoneintodiphenyl methane

25. By which of the following reac- tionscanonegetN-methylaniline from aniline ?

(A) Alkylation (B) Acetylation (C) Benzoylation (D) Bromination

26. Which of the following pairs has both members from the same period of the periodic table ? (A) Na – Ca (B) Na – Cl (C) Ca – Cl (D) Cl – Br 27. When an alkyl halide reacts with

an alkoxide the product is— (A) Hydrocarbon

(B) Unsaturated hydrocarbon (C) Ether

(D) Alcohol

28. If the ionisation potential for hydrogen atom is 13·6 eV then the ionisation potential for He+

ion should be—

(A) 27·2 eV (B) 54·4 eV (C) 6·8 eV (D) 13·6 eV 29. Acetaldehyde when treated with

dilute NaOH gives— (A) CH₃CH₂OH (B) CH₃COOH (C) CH₃CH | OH —CH₂—CHO (D) H₃C—CH₃

30. In aqueous solution H₂ will not reduce—

(A) Fe3 + _{(B) Cu}2 +

31. C₂H₅CHO and (CH₃)₂CO can be distinguished by testing with— (A) Phenyl hydrazine

(B) Hydroxylamine (C) Fehling solution (D) Sodium bisulphite

32. Which of the following reactions depicts the oxidising behaviour of H₂O₂ ? (A) 2 MnO₄–_{+ 6 H}+_{+ 5 H} 2O2→ 2 Mn2 + + 8 H₂O + 5 O₂ (B) O₃ + H₂O₂→ 2 O₂ + H₂O (C) 2 Fe2 + + 2H+ + H₂O₂→ 2 Fe3 +_{+ 2 H} 2O (D) Ag₂O + H₂O₂→ 2 Ag + H₂O + O₂ 33. Silica is soluble in—

(A) HCl (B) HNO₃ (C) H₂SO₄ (D) HF

34. Nitrogen is produced by heating—

(A) HNO₃ (B) NH₄Cl (C) NH₄NO₃ (D) NH₄Cl + NaNO₂ 35. The IUPAC name of :

CH₃—C | Cl — —C—– | CH₃ CH— | C₂H₅ CH₂—C——_{— CH} is— (A) 6-chloro-4-ethyl-5-methyl- hept-5en-1-yne (B) 6-chloro-4-ethyl-5-methyl- hept-1-yn-5-ene (C) 2-chloro-4-ethyl-3-methyl- hept-2-en-6-yne (D) 2-chloro-4-ethyl-3-methyl- hept-6-yn-2-ene 36. Theaverage K. E. of an ideal gas per molecule in SI unit at 25°C will be— (A) 61·7 × 10– 21_J (B) 6·17 × 10– 21_J (C) 6·17 × 10– 20_J (D) 7·16 × 10– 20_J 37. Gammexane is— (A) DDT (B) Benzene hexachloride (C) Chloral (D) Hexachloro ethane

38. What quantity of ammonium sul- phateisnecessaryfortheproduc- tion of ammonia gas sufficient to neutralise a solution containing 292 g of HCl—

[(NH₄)₂SO₄ = 132·0, HCl = 36·5, NH₃ = 17] (A) 272 g (B) 408 g (C) 528 g (D) 1056 g 39. The ability of an ion to bring

about coagulation of a given colloid depends upon—

(A) Its size

(B) Sign of its charge alone (C) Magnitude of its charge (D) Both magnitude and sign of

its charge

40. Solubility of salt M₂X₃ is x g mole

litre– 1. The solubility product of the salt will be—

(A) x2 _{(B) 16}_x2

41. The compound obtained by heating a mixture of a primary amine and chloroform with ethanoic potassium hydroxide (KOH) is— (A) An alkyl isocyanide

(B) An alkyl halide (C) An amide

(D) An amide and nitro compound

42. In a reaction A → B, the rate of reaction, increases two times, on increasing the concentration of reactants four times. The order of the reaction is—

(A) 0 (B) 1/2

43. The function of enzymes in the living system is to—

(A) Transport oxygen (B) Provide immunity

(D) Provide energy

44. Heat of neutralisation of strong acid and strong base is constant and is equal to—

(A) 13·7 k cal (B) 57 kJ (C) 5·7 × 104_J

45. ₉₂U235 + ₀n1

⎯→

Fission pro- ducts + Neutron + 3·20 × 10–11_J.

The energy released, when 1 gram of ₉₂U235_{finally undergoes}

fission is— (A) 12·75 × 108_kJ

(B) 18·60 × 109 kJ (C) 8·21 × 105_kJ

(D) 6·55 × 106 kJ

46. The number of electrons required todeposite1gramatom of Al (At. wt. = 27) from a solution of AlCl₃ will be—

(A) 1N (B) 2N

47. Which one of the following is used to make ‘non stick’ cook- ware ? (A) PVC (B) Polystyrene (C) Polyethylene lerephthalate (D) Polytetrafluoroethene 48. If 0·01 M solution of an electro-

lyte has a resistance of 40 ohm in a cell having a cell constant of 0·4 cm– 1 then its molar conduc- tance in ohm– 1_cm2_mole– 1_will

be—

(A) 104 _{(B) 10}3

49. Number of water molecules in Mohr’s salt is—

(A) 7 (B) 6

50. In the titration between oxalic acid and acidified potassium per- manganate, the manganous salt formed catalyse the reaction. This manganous salt is— (A) A promotor

(B) A positive catalyst (C) An autocatalyst (D) None of the above

1. In a radioactive decay— (A) α then β and then γ emitted (B) α or β and then γ emitted (C) α and β and γ emitted

simultaneously

(D) α and β emitted simultaneously

2. 10·6 grams of a substance of molecular weight 106 was dissol- ved in 100 ml. 10 ml of this solution was pipetted out into a 1000 ml flask and made upto the mark with distilled water. The molarity of resulting solution is— (A) 1·0 M (B) 10–2_M

(

P + a

)

V2 (V – b) = RT

P-pressure, V-volume, a, b and

R-constants dimensional formula of a is—

(A) L6_{(B) M}1_L–1_T–2

4. One mole of argon gas will have least density at—

(A) S.T.P. (B) 0°C, 2 atm (C) 273°C, 2 atm (D) 273°C, 1 atm

5. Which quantity remains constant in adiabatic process ?

(A) Work (B) Heat (C) Temperature (D) All of these

6. How many litres of CO₂ at STP will be formed when 100 ml 0·1 M H₂SO₄ reacts with excess of Na₂CO₃ ?

(A) 22·4 litre (B) 2·24 litre (C) 0·224 litre (D) 5·6 litre 7. If the number of molecules of

hydrogen is double to that of oxygen, at the same temperature the ratio of their average K.E. per molecule is—

(A) 1 : 1 (B) 2 : 3 (C) 1 : 2 (D) 1 : 4

8. Liquid benzene burns in oxygen according to

2C₆H_{6 (l)} + 15O_{2 (g)}

→

12CO_{2 (g)} + 6H₂O_(g)

How many litres of oxygen are required to complete combustion of 39 g of liquid benzene ? (A) 11·2 (B) 22·4

9. What is the value of P V T for 1 mole of gas ? (A) 4·2 × 107_cal/K (B) 4·2 cal/K (C) 8·31 cal/K (D) 2 cal/K

10. Reaction of benzene with alkyl halide in the presence of AlCl₃ is called—

(A) Friedel-Crafts reaction (B) Wurtz reaction (C) Williamson’s synthesis (D) Bayer’s reaction

11. Experimental verification of matter waves was done by— (A) de Broglie

(B) Rutherford (C) Bohr

(D) Davisson and Germer 12. The effective atomic number of

Cr in [Cr(NH₃)₆]Cl₃ is—

(A) 35 (B) 36

13. For the reaction :

2 1 H + 2 1 H → 4 2 He + B + Energy

What is the required condition ? (A) High temperature and

pressure

(B) High temperature and low pressure

(D) High temperature only

14. The first emission line of hydrogen atomic spectrum in the Balmer series appears is—

(R = Rydberg constant) (A) 5 36 R cm–1 (B) 3 4 R cm–1 (C) 7 144 R cm–1(D) 9 400 R cm–1 15. Which property cannot be explained by wave theory of light/ radiation ?

(A) Diffraction (B) Interference (C) Polarisation (D) Photoelectric effect

16. A gas decolourises bromine in CCl₄ and forms a precipitate with ammoniacal silver nitrate. The gas is—

(A) C₂H₂ (B) C₂H₄ (C) C₂H₆ (D) CH₄ 17. The pH of a solution of concen-

tration few less than 1N NaOH— (A) Between 13 and 14

(B) Between 12 and 13 (C) Between 0 and 1 (D) Between 1 and 2

18. The element which can displace three other halogens from their compounds is—

(A) Cl (B) F

19. The geometry of the hybrid orbital, which contains 20% s-

character is— (A) Octahedral (B) Tetrahedral

20. Cassiterite is concentrated by— (A) Levigation

(B) Electromagnetic separation (C) Floatation

(D) Liquefaction

21. In the reaction of CH₂ = CH₂ and HBr initial addition occurs of— (A) Indefinite

(B) H+_{+ Br}–_{both at one time}

(D) Br–

22. Which one of the following reactions is an example for calcina- tion process ?

(A) 2Ag + 2HCl + (O)

→

2AgCl + H₂O (B) 2Zn + O₂

→

2ZnO

→

2ZnO + 2SO₂ (D) MgCO₃

→

MgO + CO₂ 23. 0·1M CH₃COOH is 1·3% ionised.

The dissociation constant of it will be—

(A) 1·69 × 10–5

(B) 1·69 × 10–6 (C) 1·69 × 10–4 (D) None of these

24. In Wurtz reaction the reagent used is—

(A) Na

(B) Na/liq. NH₃ (C) Na/dry ether (D) Na/dry alcohol

25. When ethanamide is heated with NaOH and Br₂ the compound formed is—

(A) CH₃CONH₂ (B) C₂H₅NC (C) CH₃CH₂NH₂ (D) CH₃NH₂ 26. Compound A reacts with PCl₅ to

get B which on treatment with KCN followed by hydrolysis gave propionic acid. What are A and B respectively ?

(A) C₃H₈ and C₃H₇Cl (B) C₂H₆ and C₂H₅Cl (C) C₂H₅Cl and C₂H₅Cl₂ (D) C₂H₅OH and C₂H₅Cl 27. Brass in an alloy of—

(A) Cu + Zn + Fe (B) Cu + Zn + Ni (C) Cu + Zn + Sn (D) Cu + Zn

28. The reagent used for converting ethanoic acid to ethanol is— (A) LiAlH₄ (B) BH₃ (C) PCl₃ (D) K₂Cr₂O₇/H+

29. The rate constant of forward reaction is 2·38 × 10– 4 and the rate constant of backward reaction is 4·76 × 10–5. The equilibrium constant for the reaction will be—

(A) 5 (B) 5 × 10–2

(C) 2 × 10–4 (D) None of these 30. If the equilibrium constant for the reaction 2AB A₂ + B₂ is 49. What is the value of equilibrium constant for AB 1 2 A2+ 1 2 B2 ? (A) 49 (B) 2401 (C) 7 (D) 0·02

31. How muchvolume of 0·4M NaOH is required to neutralise comp- letely 200 ml 0·5 M H₂SO₄ solution ?

(A) 600 ml (B) 300 ml (C) 500 ml (D) 200 ml 32. Among the following compound

which have more than one type of hybridisation for carbon atom ?

(i) CH₃—CH₂—CH₂—CH₃ (ii) H₃C—CH——CH—CH₃ (iii) H₂C——CH—C——_—CH (iv) H—C——_—C—H (A) (ii) and (iii) (B) (i) (C) (iii) and (iv) (D) (iv)

33. One compound reacts with chloroform in presence of KOH and produces a bad smell (nauseating odour) compound. The compound formed is— (A) CH₃CH₂NH₂ (B) C₆H₅CN (C) CH₃CH₂NC (D) C₂H₅CN 34. The IUPAC name of K₃[Fe(CN)₆]

(A) Potassium ferrocyanide(II) (B) Potassium hexaferrocyanate (III) (C) Potassium ferrohexacyanate (II) (D) Potassium hexacyanoferrate (III) 35. A + NaOH → CH₃OH + HCOONa in the reaction compound A is—

(A) HCN (B) HCHO

CH₃Cl

⎯→

KCN (A) H₂O

⎯→

(B) NH₃

⎯→

(C)

→

Δ (D) is— (A) CH₃CH₂NH₂ (B) CH₃CN (C) HCONH₂ (D) CH₃CONH₂ 37. Metal which does not react with

aqueous solution of copper sulphate is—

(A) Pb (B) Ag

38. Who developed long form of periodic table ?

(A) Lothar Mayer (B) Niels Bohr (C) Mendeleef (D) Moseley 39. 5SO₃2–_{+ 2MnO} 4– + 6H+ → 5SO42– + 2Mn2+ + 2H2O.

The oxidation number of Mn changes from— (A) + 14 to + 4 (B) + 6 to + 2 (C) – 7 to – 2 (D) + 7 to + 2 40. In a reaction CH₂——CH₂Hypochlorous

⎯⎯⎯⎯→

acid M R

⎯→

CH| 2OH CH₂OH M = Molecule, R = Reagent M and R are—

(A) CH₃CH₂Cl and NaOH (B) CH₂Cl—CH₂OH and aq. NaHCO₃ (C) CH₃CH₂OH and HCl (D) — O 2 CH2 CH and heat

41. Formic acid and acetic acid may be distinguished by the reaction with—

(A) Sodium

(B) 2, 4-dinitrophenyl hydrazine (C) Litmus paper

(D) Tollen’s reagent

42. Which of the following is redox reaction ?

(A) H₂SO₄ with NaOH

(B) In atmosphere, O₃ from O₂ by lightning

in a molecule of H₂SO₄—

(A) 4 (B) 3

44. Which of the following 0·1 m aqueous solutions will have the lowest f.p. ? (A) Al₂(SO₄)₃ (B) C₅H₁₀O₅ (C) KI (D) C₁₂H₂₂O₁₁ 45. Carnallite is— (A) KCl (B) Li Al(SiO₃)₂ (C) MgCl₂·6H₂O (D) KCl·MgCl₂·6H₂O

46. The lanthanide contraction is res- ponsible for the fact that— (A) Zr and Y have about the

same radius

(B) Zr and Nb have similar oxidation state

(D) Zr and Zn have the same oxidation state

47. Which of the following halides is least stable and has doubtful existence ?

(A) C

I

(B) Sn

I

(D) Pb

I

48. Philosopher’s wool when heated with BaO at 1100°C gives a compound. Identify the compound— (A) BaZnO₂ (B) Ba + ZnO₂ (C) BaCdO₂ (D) BaO₂ + Zn 49. Iodine is liberated from KI

solution when treated with—

(A) ZnSO₄ (B) CuSO₄ (C) NiSO₄ (D) FeSO₄

50. The poisonous gas that comes out with petrol burning in a car is—

(A) CH₄ (B) C₂H₆ (C) CO₂ (D) CO

Introduction

● The adult human skeleton consists of 206 bones linked in a specific order. Many of these bones are joined in ways that permit movement.

● The growth of skeletons begins during early develop- ment and continue until about age of 20 years.

● Like all other organ systems of body, bones undergo alterations during the entire life span, from infancy to old age.

● The various parts of the skeleton are so articulated that they can absorb the tremendous shocks generated in locomotion.

In document competittion sucess visionSept09 (Page 49-56)