Conclusión

(B) ⊕

(C) (D)

49. The formula of rust is—

(A) FeO.5 H₂O

(B) Fe(OH)₃ (C) Fe₂O₃.x H₂O (D) Fe₂O₃

50. Which is used as an anaesthetic ? (A) CH₃OCH₃

(B) C₂H₅OC₂H₅ (C) CH₃OC₂H₅ (D) C₃H₇OC₂H₅

ANSWERS WITH HINTS

●●●

DELHI

UPKAR’S

E-mail : [email protected] Website : www.upkar.in

UPKAR PRAKASHAN, AGRA–2

● Station Controller ● Train Operator ● Section Engineer

● Junior Engineer ● Junior Station Controller Including Previous Years’ Solved Papers

For–

By : Dr. Lal & Jain Code No. 971 Price : Rs.

299/-METRO RAIL CORPORATION

(Technical Cadre)

1. Isodiapheres have—

(A) The same number of neu-trons but different number of protons

(B) The same number of pro-tons-electrons

(C) The same radius of nucleus sphere

(D) The same number of neu-trons-protons

2. The quantum number which is responsible for the size of elec-tron cloud is—

(A) Spin (B) Azimuthal (C) Principal (D) Magnetic

1 2 3 4 5

3. HC ≡ C—CH —— CH—CH₃ Which carbon atom will show minimum electronegativity ? (A) Fifth (B) Third (C) Second (D) First

4. The maximum values of m for l = 2 is—

(A) 0, ± 1 (B) ± 1, ± 2 (C) 0, ± 1, ± 2 (D) 0, ± 2 5. In which of the following

com-pounds chromium shows maxi-mum radius ?

(A) K₂Cr₂O₇ (B) CrO₂Cl₂ (C) Cr₂(SO₄)₃ (D) CrCl₂ 6. Which one is not Lewis acid ?

(A) NH₃ (B) Cu²⁺

(C) ZnCl₂ (D) BF₃ 7. At 444°C HI is 20% dissociated,

if initially 3 mole of HI are taken, what is the number of moles of HI at equilibrium ?

(A) 0·6 (B) 4·8 (C) 2·4 (D) 5·4

8. The pH of an aqueous solution is 4·7. Then H⁺ concentration will be—

(A) 3 × 10^{– 6} (B) 3 × 10^{– 5} (C) 2 × 10^{– 5} (D) 5 × 10^{– 5} 9. A^– + H₂O HA + OH^–

represents the hydrolysis reac-tion. This indicates that the salt is made up of—

(A) Strong acid weak base (B) Strong base weak acid

(C) Weak acid weak base (D) Strong acid strong base 10. Strongest base is—

(A) RbOH (B) LiOH

(C) KOH (D) NaOH

11. A solution of 1M acetic acid contains 0·1 M HCl. What would be the value of CH₃COO^– ion concentration. pK_a = 5 ?

(A) 10^{– 4} (B) 10^{– 5} (C) 10^{– 6} (D) 10^{– 3} 12. When solid potassium cyanide is

added in water then—

(A) Electrical conductivity will not change

(B) pH is reduced (C) pH is increased

(D) pH will remain the same 13. Electrochemical equivalent of an

element is—

(A) Atomic wt. × Valency 96500 (B) Atomic wt. × 96500

Valency (C) Atomic wt.

Valency × 96500 (D) Valency × 96500

Atomic wt.

14. The IUPAC name of : (CH₃)₃C—CH = CH₂ (A) Vinyl trimethyl methane (B) 2, 2-dimethyl-3-butene (C) Tertiary butyl ethene (D) 3, 3-dimethyl-1-butene 15. Osmotic pressure is 0·0821

atmosphereattemperature27°C.

Find the concentration of solu-tion in mole/litre—

(A) 0·033 (B) 0·066 (C) 0·0033 (D) 3 16. Friedel-Crafts reaction is—

(A) C₂H₅OH+Zn→ ^C2H₆ +ZnO (D) None of these

17. The work of expansion for a system is 500 cal. The heat given to the system is 80 cal.

The change in internal energy in the process will be—

(A) 80 cal (B) 500 cal (C) – 420 cal (D) 420 cal 18. Conjugated double bond is

pre-sent in—

(A) Butylene (B) Butadiene (C) Isobutylene (D) Propylene 19. Which of the following is less

than zero during adsorption ?

(A) ΔG (B) ΔS

(C) ΔH (D) All of these 20. The active species in reaction

between methane and chlorine, to get chloromethane is—

(A) Cl₂ (B) Cl° (C) Cl^– (D) Cl⁺

21. The most convenient method to protect the bottom of ship made of iron is—

(A) Coating it with red lead oxide

(B) White tin plating

(C) Connecting it with Mg block (D) Connecting it with Pb block 22. C₂H₅OH and H₂SO₄ at 170°C

from—

(A) C₂H₄ (B) CH₃CHO (C) CH₃COOH (D) CH₃COCH₃ 23. The metal with least density is—

(A) Be (B) B

and CH₃CHO, then the formula of parent hydrocarbon will be—

(A)

25. Tempering of steel is done as—

(A) Steel is made red hot and dipped in water

(B) Steel is made red hot and cooled slowly

(C) Steel is heated at much low temperature and cooled slowly

(D) Steel is made red hot and dipped in oil

26. Gaseous formaldehyde at room temperature polymerises to—

(A) Paraformaldehyde (B) Metaldehyde (C) Trioxy methylene (D) Paraldehyde

27. Mg ribbon after heating in an atmosphere of nitrogen when dipped in cold water produces a gas which is—

(A) NH₃ (B) H₂ (C) O₂ (D) N₂

28. If nitrobenzene is reduced in pre-sence of Zn + NH₄Cl then the product will be—

(A) p-amino phenol (B) Phenyl hydroxylamine (C) Aniline

(D) Azobenzene 29. Microcosmic salt is—

(A) Na (NH₄) HPO₄.4 H₂O (B) Na (NH₄).H₂O

(C) Na (NH₃) HPO₄.4 H₂O (D) K (NH₄) HPO₃.2 H₂O 30. Which enzyme is effective in the

following reaction ?

C₆H₁₂O₆→ ^{2 C}2H₅OH + 2 CO₂ (A) Invertase (B) Zymase (C) Maltase (D) Diastase 31. An excess of AgNO₃ is added to

100 ml of 0·01 M solution of dichloro tetraaquo chromium(III) chloride. The number of moles of AgCl precipitated would be—

(A) 0·001 (B) 0·002 (C) 0·003 (D) 0·01

32. What is the product of the reac-tion of ethyl amine and HNO₂ ? (A) Ethene

(B) Primary alcohol (C) Ethyl nitrile (D) Nitrosoethane

33. By the action of conc. H₂SO₄ phosphorus changes to—

(A) Phosphorus acid (B) Metaphosphoric acid (C) Orthophosphoric acid (D) Pyrophosphoric acid 34. Nitrobenzene, on reaction with

fuming nitric acid at 90°C, the

35. Iodine is liberated from KI solution when treated with—

(A) ZnSO₄ (B) CuSO₄ (C) NiSO₄ (D) FeSO₄ 36. The most electronegative

ele-ment in periodic table is—

(A) Fr (B) F 38. The highest magnetic moment

will be shown by—

(A) Ni (B) Co

(C) Fe (D) Zn

39. For which of the following com-pound, the Lassaigne’s test for N will fail—

(A) NH₂NH₂.2 HCl (B) NH₂.CO.NH₂ (C) NH₂CO NH NH₂HCl (D) C₆H₅N—— N–C₆H₅

40. If 19 is the atomic number of an element then this element will be—

(A) A metal with + 3 oxidation state

(B) A metal with + 1 oxidation state

(C) An inert gas

(D) A metal with – 3 oxidation state

42. Which of the following is not a member of 3d transition series ?

(A) Fe (B) Co is the example of—

(A) Geometrical isomerism (B) Optical isomerism (C) Tautomerism (D) None of these 44. Malachite is the ore of—

(A) Cu (B) Ni

(C) Au (D) Hg

45. Theorder of reactivity of alcohols with respect to acid catalysed elimination will be—

(a) (CH₃)₃ C—OH 46. The purest form of iron is—

(A) Wrought iron (B) Cast iron (C) Iron turning (D) Stainless steel

47. Suitable reagent to obtain ethan-ethiol from bromoethane is—

(A) Sodium hydrogen sulphide (B) Sodium sulphide

(C) Potassium sulphide (D) Sodium sulphate 48. Blue vitriol is—

(A) MnSO₄.7 H₂O (B) CuSO₄.5 H₂O (C) FeSO₄.7 H₂O (D) NiSO₄.6 H₂O

49. Both HCHO and CH₃CHO give similar reactions with all the reagents except—

(A) Schiff’s reagent (B) Ammoniacal AgNO₃ (C) Fehling solution (D) Ammonia

50. Tischenko reaction proceeds in presence of—

(A) Zn and ZnCl₂ (B) Al powder

(C) Al (OC₂H₅)₃ and anhydrous AlCl₃

(D) FeCl₃

1. How many molecules are con-tained in 3·5 g of CO at 0°C and 760 mm pressure ?

(A) 3·5 × 6·02 × 10²³ (B) 28 × 6·02 × 10²³ (C) 7·525 × 10²² (D) None of these

2. The nucleus of an electrically neutral atom undergoes radio-activedecay.It willremain neutral after the decay if the process is a—

(A) β^–-decay (B) β⁺-decay (C) γ-decay (D) Neutron decay

3. Total number of possible isomers of formula C₇H₇NO₂ having a benzene ring is—

(A) 6 (B) 8

(C) 10 (D) 15

4. The density of nitrogen is maxi-mum at—

(A) STP

(B) 273 K and 2 atm (C) 546 K and 1 atm (D) 546 K and 4 atm

5. Which metal has maximum ten-dency to get oxidised ?

(A) Mg (B) Zn

(C) Cu (D) Ag

6. What would be the weight of the slaked lime required to decom-pose 8·0 g of ammonium chlo-ride ?

(A) 5·53 g (B) 2·12 g (C) 15·52 g (D) 7·62 g 7. Which of the following is not a

colligative property ? (A) Osmotic pressure (B) Vapour pressure (C) Elevation of b.p.

(D) Depression of f. p.

8. In the reaction 2Ag + 2H₂SO₄→

Ag₂SO₄ + 2H₂O + SO₂, sulphuric acid acts as—

(A) An oxidizing agent (B) A reducing agent (C) A catalyst

(D) Anacid as well as an oxidant 9. An anhydride of HClO₄ is—

(A) Cl₂O (B) ClO₂ (C) Cl₂O₆ (D) Cl₂O₇ 10. How many mL of 0·1 M H₂SO₄

must be added to 50 mL of 0·1 M NaOH to give a solution that has a concentration of 0·05 M in H₂SO₄ ?

(A) 400 mL (B) 50 mL (C) 200 mL (D) 100 mL 11. Which of the following will reduce

acidic K₂Cr₂O₇ solution ? (A) White vitriol

(B) Mohr’s salt (C) Chile salt petre (D) Potash alum 12. In the equilibrium

H₂O_(g) H_2(g) + 1 2 O_2(g), the extent of dissociationof water when P = 1 atm and K = 2·08 × 10^{– 3} is approximately—

(A) 2% (B) 0·2%

(C) 20% (D) 1%

13. The IUPACname of is—

(A) Trans-3-methyl pent-2-ene (B) (Z)-3-methyl pent-2-ene (C) Trans-2-ethyl but-2-ene (D) (E)-3-methyl pent-2-ene 14. A given weak acid (0·01 M) has

pKa = 6. The pH of the solution is—

(A) 3 (B) 4

(C) 5 (D) 6

15. Which of the following is stron-gest acid ?

(A) Phenol (B) o-nitrophenol

(C) m-nitrophenol (D) 2, 4-dinitrophenol

16. Which of the following aqueous solutions has the highest boiling point ?

(A) 0·1 M KNO₃ (B) 0·1 M Na₃PO₄ (C) 0·1 M BaCl₂ (D) 0·1 M K₂SO₄

17. Mercury(II) forms a complex with—

(A) H₂S (B) SnCl₂

(C) KI (D) NaOH

18. During adsorption—

(A) TΔS is positive (B) ΔH-TΔS is negative (C) ΔH is positive

(D) TΔS and ΔG become zero 19. Oxidation of NH₃ by CuO yields a

molecule in which oxidation state of nitrogen is—

(A) + 6 (B) + 3

(C) 0 (D) + 4

20. Ozoneispowerfuloxidizingagent.

It is—

(A) Less oxidizing than F₂ (B) More oxidizing than F₂ (C) Less oxidizing than O₂ (D) Less oxidizing than H₂O₂ 21. Epsom salt is—

(A) CuSO₄.5 H₂O (B) ZnSO₄.7 H₂O (C) FeSO₄.7 H₂O (D) MgSO₄.7 H₂O

22. Which ofthe following statements is incorrect ?

(A) Boron carbide is used as an abrasive

(B) Boron isusedto increase the hardenability of steel (C) Boronoxide(B₂O₃)isusedin

the manufacture of borosili-cate glass

(D) Orthoboric acid undergoes intramolecular hydrogen bonding

23. Which of the following gives methane on reaction with water? (A) Al₄C₃ (B) Mg₂C₃ (C) CaC₂ (D) CaH₂ 24. Which of the following molecules

is not a donor ?

(A) (C₂H₅)₂NH (B) (C₂H₅)₃N (C) (SiH₃)₃N (D) C₂H₅OH

25. Sugar of lead is—

(A) PbSO₄

(B) Pb (CH₃COO)₂.3H₂O (C) PbCl₂

(D) PbCO₃

26. The number of S—S bondsin the cyclic trimer of sulphur trioxide

gases is the least polarised ? (A) Radon (B) Krypton (C) Xenon (D) Helium 29. Which of the following hydrides is

most stable ?

(A) CH₄ (B) PbH₄ (C) SiH₄ (D) SnH₄ 30. The least melting metal among

the following is—

(A) Tin (B) Carbon (C) Germanium (D) Lead 31. Select the rate law that

corres-ponds to the data shown for the following reaction :

A + B → C

Exp. [A]₀ [B]₀ Initial Rate 1 0·012 0·035 0·10 2 0·024 0·070 0·80 3 0·024 0·035 0·10 4 0·012 0·070 0·80 (A) Rate = K [B]³

(B) Rate = K [B]⁴ (C) Rate = K [A] [B]³ (D) Rate = K [A]² [B]²

32. Which vitamin contains N, S and Cl elements ?

(A) Thiamine (B) Cyanocobalamin (C) Ergocalciferol (D) Adermin

33. Eightgramsofaradioactive subs-tance are reduced to 0·5 g after 1 hour. The half-life period of radio-active substance is—

(A) 15 min (B) 30 min (C) 45 min (D) 10 min 34. Purple of Classius is a colloidal

solution of—

(A) Silver (B) Gold (C) Copper (D) Platinum

35. Acidic solution of a salt produced deep blue colour with starch and KI. The salt is—

(A) Chloride (B) Nitrite (C) Acetate (D) Bromide 36. Which of the following ions

dis-proportionates in water ? (A) Au³⁺ (B) [Au (CN)₄]^– (C) [AuCl₄]^– (D) Au⁺

37. Which of the following elements shows allotropy ?

(A) Zn (B) Sn

(C) Mg (D) Cs

38. On strong heating, which of the following produces a mixture SO₂ and SO₃ ? square velocity ?

(A)

( )

^{3RTM 1/2 (B)}

( )

^{DM3P 1/2}

(C)

( )

^{3PD 1/2 (D)}

( )

^{3PVM 1/2}

40. NaCl and Na₂SO₄ can be distin-guished by—

(A) Gutzeit’s test (B) Marsh’s test (C) The flame test

(D) The chromyl chloride test 41. Which of the following does not

adopt hcp structure ?

(A) Be (B) Mg

(C) Fe (D) Mo

42. Which is the most stable confor-mation of cyclohexane ?

(A) Chair (B) Twist (C) Boat (D) Staggered 43. Which of the following contains

maximum number of electrons in the antibonding molecular orbi-tals ?

(A) O₂ (B) O₂^{2 –} (C) O₂^– (D) O₂⁺

44. Themajorproduct obtained in the reaction 3d-electrons having spin quantum number, s = + 1/2 is—

(A) 10 (B) 5

(C) 2 (D) 1

46. Which of the following will give only one monosubstituted pro-duct ?

(A) o-dinitrobenzene (B) m-dinitrobenzene (C) p-dinitrobenzene (D) None of these

47. Which of the following is laevoro-tatory ?

(A) Glucose (B) Sucrose (C) Fructose (D) Galactose 48. The product of addition

polymeri-zation reaction is—

(A) PVC (B) Nylon (C) Terylene (D) Polyamide 49. Which of the following reagents

can be safely used to convert CH₂—— CHCHO →

CH₂—— CHCOOH (A) Cold alk. KMnO₄ solution (B) Diamine Silver(I) Hydroxide (C) Cold dil. Cl₂/NaOH solution (D) Br₂ in CCl₄

50. The unit of Q (reaction quotient) is—

(A) (Concentration)^Δn (B) (Atmosphere)^Δn

(C) Pressure and temperature dependent

(D) Does not have a unit

Introduction

● The lymphatic system helps to maintain the proper fluid balance in the tissues and the blood, to conserve protein and to remove bacteria and other particles from the tissues.

● It consists of a network of fluid-filled vessels that open into the blood-vessel system, together with masses lymphoid tissue.

● The lymphoid tissue is, in part, intimately associated with the network of vessels, as in the lymph nodes or glands, is less intimately associated with the vessels, as in the tonsils and thymus, or has no obvious con-nection with the vessel network, as in the spleen.

● The fluid in the lymphatic vessels, called lymph, is as a rule clear, or faintly opalescent, except the lymph called chyle, which comes from the intestine. Chyle at times may be white and milky in appearance because of the minute globules of fat that it contains. The thin walled vessels through which chyle flows are referred to as lacteals because of their milky appearance.

In document Trabajo Fin de Máster (página 96-99)