1.When H2Sis passed through nitric acid, the product is
a) rhombic S 
b) prismatic S 
c) amorphous S 
d) monoclinic S

2.In the case autocatalyses
a) reactant catalyses 
b) heat produced in the reaction catalyses 
c) product catalyses 
d) solvent catalyses

3.Surface tension of lyophillic sols is
a) lower than that of H2O 
b) more than that of H2O 
c) equal to that of H2O 
d) none of the above

4.Alum helps in purifying water by
a) forming Si complex with clay particles 
b) sulphate part which combines with dirt and removes it 
c) aluminium coagulates the mud particle 
d) making mud water soluble

5.The heat of adsorption in physical adsorption lies in the range (in kJ/mol)
a) 40 - 400 
b) 40 - 100 
c) 10 - 40 
d) 200 - 400

6.Adsorption is multilayer in the case of
a) physical adsorption 
b) chemical adsorption 
c) both 
d) none of both

7.Lyophillic colloids are stable due to
a) charge on the particle 
b) large size of the particle 
c) small size of the particle 
d) due to extensive solvation

8.Cellulose dispersed in ethanol is called
a) Emulsion 
b) Micelle 
c) Collodion 
d) Hydrophilic son

9.Which is adsorbed to maximum amount by activated charcoal?
a) N2          b) CO2         c) Cl2         d) O2

10.For adsorption of a gas on a solid, the plot of log x/m v/s log P is linear with slope equal to
a) k         b) log k         c) n         d) 1/n

11.Which of the following is less than zero during adsorption?
a) ΔG         b) ΔS         c) ΔH         d) all the above

12.Which one among the following sols is hydrophobic?
a) gum         b) gelatin         c) starch         d) sulphur

13.Enzymes are
a) micro-organism 
b) proteins 
c) inorganic compounds 
d) moulds

14.In the hydrogenation of oils, the catalyst used is
a) iron         b) platinum         c) nickel         d) molybdenum

15.When a colloidal solution is observed under an ultra microscope, we can see
a) light scattered by colloidal particles 
b) size of the particle 
c) shape of the particle 
d) none of the above

16.In colloidal state, particle size ranges from
a) 1 to 10 Å 
b) 20 to 50 Å 
c) 10 to 1000 Å 
d) 1 to 280 Å

17.Which of the following will have the highest coagulation power for As2S3colloid
a) PO43− 
b) SO42− 
c) Al3+ 
d) Na+

18.Gold number is minimum in case of
a) Gelatin         b) Egg albumin         c) Gum arabic         d) Starch

19.Butter is colloid formed when
a) Fat is dispersed in water 
b) Fat globules are dispersed in water 
c) water is dispersed in fat 
d) none of the above

20.Which of the following is not a colloid?
a) Chlorophyll         b) Smoke             c) Ruby Glass         d) Milk

21.The first artificial disintegration of an atomic nucleus was achieved by
a) Geiger         b) Wilson         c) Madame Curie         d) Rutherford

22.The reactor used to convert stable form to fissile form is
a) chemical reactor 
b) nuclear reactor 
c) breeder reactor 
d) atomic reactor

23.In the case of a radioisotope, the value of t1/2andλ are identical in magnitude. The value is
a) 1/0.693         b) (0.693)2         c) 0.693     d) (0.693)1/2

24.If Xabemitsfirstlyapositron, then 2 αand 2 βand in the last α is emitted and finally it changes to Ydc.The correct relation is
a) a = c +12, d = b-5 
b) a = c+8, d = b-1 
c) a = c+6, d = b-2 
d) a = c+4, d = b-2

25.Isobar of a nucleide is formed when ................ takes place
a) 1 αemission 
b) 1βemission 
c) 1αand1βemission 
d) 2αand1βemission

26.What will be the half life period of nucleus if at the end of 4.2 days, N=0.798N0(log1.25=0.09)
a) 15 days         b) 10 days         c) 12.83 days     d) 20 days

27.Radioactive decay, which one of the following moves the fastest?
a) α         b) β         c) γ         d) positron

28.Which element is the end product of every natural radioactive series?
a) Pb         b) Sn         c) C         d) Bi

29.Which is not emitted by radioactive substance?
a) α         b) β         c) positron         d) proton

30.Energy released in the nuclear fusion reaction, H12+H13→He24+n01,atomic mass of H12=2.014;H13=3.016;He24=4.003;n01=1.009(allinamu)
a) 16.6 MeV 
b) 500 J 
c) 4×106kcal 
d) 8.3 eV

31.If amount radioactive substance is increased 3 times, the number of disintegrating atoms per unit time will be
a) doubled         b) tripled         c) one third         d) unchanged

32.Which of the following is used as neutron absorber in the nuclear reactor
a) water 
b) deuterium 
c) compound of uranium 
d) cadmium

33.A radioactive isotope decays at such a rate that after 96 minutes only 1/8 of the original amount remains. The value of t1/2is
a) 12 minutes 
b) 32 minutes 
c) 24 minutes 
d) 48 minutes

34.In the nuclear reaction, U92238→Pb82206,the number of αandβparticles emitted are
a) 7α,5β         b) 6α,4β         c) 4α,3β         d) 8α,6β

35.From the reaction given below deduce the group of polonium in the periodic table. (Pb belongs to group 14) Po84210→Pb82206+He24
a) 2         b) 14         c) 6         d) 16

36.What is X in the nuclear reaction, N714+H11→O815+X
a) proton         b) neutron         c) γ         d) positron

37.The nuclear reaction, H12+H12→H13+energy, is called
a) Fusion 
b) Fission 
c) Chain reaction 
d) Spontaneous reaction

38.An aqueous solution freezes at −0.1860C(Kf=1.86,Kb=0.512)What is the elevation in boiling point?
a) 0.186         b) 0.512         c) 0.8         d) 0.0512

39.In a mixture of A and B compounds show negative deviation as
a) ΔVmix>0 
b) ΔHmix<0 
c) A-B interaction is weaker than A-A and B-B interaction 
d) None of the above reason is correct

40.For a 1 molar solution of NaCl in water at 250Cand 1 atm pressure
a) molality = normality 
b) molarity = normality 
c) molality = mole fraction 
d) molarity = mole fraction

41.A 5% solution of cane sugar is isotonic with 1% solution of substance X. Molecular weight of X is
a) 171.2         b) 68.4         c) 34.2         d) 136.2

42.The relationship between osmotic pressure at 273 K when 10 g glucose (P1),10g urea (P2)and 10g sucrose (P3)are dissolved in 250 ml of water is
a) P1>P2>P3 
b) P3>P1>P2 
c) P2>P1>P3 
d) P2>P3>P1

43.What is the molarity of H2SO4solutionthat has a density of 1.84g/ccat350Cand contains 98% by weight?
a) 4.18 M 
b) 8.14 M 
c) 18.4 M 
d) 18 M

44.The concentration units independent of temperature would be
a) normality 
b) mass-volume percent 
c) molality 
d) molarity

45.Which of the following method is used for measuring the osmotic pressure of the solution?
a) Ostwald method 
b) Berkely Hartley 
c) Solvay method 
d) Haber's method

46.Which one of the following salt will have the same value of vant Hoff 's factor as that of K4[Fe(CN)6]
a) Al2(SO4)3 
b) NaCl 
c) Al(NO3)3 
d) Na2SO4

47.Isotonic solutions at a particular temperature have the same
a) density         b) normality         c) molar concentration         d) volume

48.Which of the following is not a colligative property?
a) ΔTf         b) π         c) ΔTb     d) Kb

49.Molarity of pure water is
a) 55.6         b) 50         c) 100         d) 18

50.Azeotropic mixtures are
a) Constant boiling mixtures 
b) Those which boil at different temperatures 
c) Mixture of two solids 
d) none of the above