SCIENTIFIC ASSISTANT –CHEMISTRY 26-04-2016 PSC ANSWER PAPER

SCIENTIFIC ASSISTANT –CHEMISTRY(NCA-SC),POLICE(FORENSIC SCIENCE LABORATORY)

EXAM DATE:26-04-2016

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1.Who was the leader of Karivallor struggle?

A.Accamma Cheriyan

B.Kaumudi Teacher

C.K.Devayani*

D.A.V.Kuttimalu Amma

Ans:C

2.The first female Judge in India

A.Lalitha Prabhu

B.Anna Chandy*

C.Margaret Pavamani

D.Koothattukulam Mary

Ans:B

3.In Indian constitution Directive principles of state policy are adapted from which constitution?

A.Irish Constitution*

B.French Constitution

C.Canadian Constitution

D.United States Constitution

Ans:A

4.P.K.Thungan Committee related which of the following?

A.Planning Commission

B.Panchayath Raj*

C.Federalism

D.Judiciary

Ans:B

5.Savarna Jatha organized under the leadership of

A.K.P.Kesava Menon

B.T.K.Madhavan

C.Mannath Padmanabhan*

D.K.Kelappan

Ans:C

6.Who wrote the drama ‘Pattabakki’?

A.V.T.Bhattatiripad

B.M.P.Bhattatiripad

C.K.Damodaran*

D.N.Krishna Pillai

Ans:C

7.A parliamentary executive means

A.Executive where there is a Parliament*

B.Executive elected by the Parliament

C.Where the Parliament functions as the Executive

D.Executive that is dependent on support of the Majority in the Parliament

Ans:A

8.Female Oriented Poverty Reduction Scheme is

A.Kudumbasree*

B.Antyodaya Anna Yojana

C.Mahila Samridhi Yojana

D.Balika Samridhi Yojana

Ans:A

9.’Pakanarcharitham’a social drama written by

A.Kelu Nair*

B.Kannan Nair

C.P.Kunhiraman Nair

D.K.A.Keraleeyan

Ans:A

10.The ‘12(th)’South Asian Games will be conducted the city of

A.Bangalore

B.Guwahati*

C.Agarthala

D.Patna

Ans:B

11.Indian Press Act passed  in which year?

A.1908

B.1909

C.1910*

D.1911

Ans:C

12.Shahmal led the revolt against British at

A.Kanpur

B.Lucknow

C.Barout*

D.Delhi

Ans:C

13.Who was elected the first Indian Women President of the UN General Assembly?

A.Sarojini Naidu

B.Vijayalakshmi Pandit*

C.Suchetha Kripalani

D.Indira Gandhi

Ans:B

14.The First Governor of Reserve Bank of India

A.C.D.Deshmukh*

B.B.Rama Rao

C.S.Jagannathan

D.P.C.Bhattacharya

Ans:A

15.The Head Quarters of UNESCO

A.Newyork

B.Paris*

C.Janeeva

D.Britain

Ans:B

16.The first Head of the National Commission for women was

A.Jayanti Patnaik*

B.Dr.V.Mohini Giri

C.Mamata Sharma

D.Lalitha Kumaramangalam

Ans:A

17.Who was founded the Akhila Thiruvithamcore Navika Thozhilali Sangam?

A.Chattambi Swamikal

B.Sree Narayana Guru

C.Dr.Velukutty Arayan*

D.Vagbhatananda

Ans:C

18.East India Association was established by

A.Dadabhai Naoroji*

B.Surendranath Banarjee

C.W.C.Banarjee

D.Mahadev Govind Ranade

Ans:A

19.The first President of All India Muslim League was

A.Nawab Salim Ullah Khan

B.Aga Khana*

C.Maulana Muhammadali Jauhar

D.Muhammad Ali Jinnah

Ans:B

20.The largest District in Kerala

A.Idukki

B.Malappuram

C.Palakkad*

D.Ernakulam

Ans:C

21.Mycene is a

A.Monocyclic terpenoid

B.Bicyclic terpenoid

C.Acyclic terpenoid*

D.Sesqul terpenoid

Ans:C

22.Geometrical isomer of geraniol is

A.Nerol*

B.Linalool

C.Citranellol

D.Citranellal

Ans:A

23.Gutta-Percha is

A.cis-polyisoprene

B.trans-polyisoprene*

C.cis-polyisobutylene

D.trans-polyisobutylene

Ans:B

24.Which one of these is a quinoline alkaloid?

A.Nicotine

B.Cocaine

C.Atropine

D.Cinchonine*

Ans:D

25.Mercerised cotton is

A.Cotton treated with NaOH*

B.Cotton treated with KOH

C.Cotton treated with ‘HNO_(3)’

D.None of these

Ans:A

26.Oil of winter green

A.Acetyl salicylic acid

B.Ethyl salicylate

C.Methyl salicylate*

D.None of these

Ans:C

27.The temperature at which second virial coefficient of a gas is zero is

A.Boyle temperature*

B.Critical temperature

C.Boiling point

D.Critical temperature

Ans:A

28.A crystal having unit cell dimensions,’a’’!=’’b’’!=’’c’,’alpha’’=’’beta’’=’’Gamma’=’90⁰is

A.Cubic

B.Tetragonal

C.Orthorhombic*

D.Monoclinic

Ans:C

29.Wavelength corresponding to maximum energy is inversely proportional to temperature.The law is

A.Wein displacement law*

B.Stefan’s law

C.Boltzmann law

D.Rayleigh Jean’s law

Ans:A

30.NQR is observed in the region

A.UV-Visible

B.X-ray

C.Microwave

D.Radiofrequency*

Ans:D

31.The ground term symbol of Lithinum atom

A.’I_S_O’

B.’2_5_(1/2)’*

C.’2_5_1’

D.’3_5_1’

Ans:B

32.Optical rotation and circular dichroism together are known as

A.Cotton effect*

B.ORD

C.Frank Condon principle

D.Stark effect

Ans:A

33.The intensity of rotational spectral line depends on

A.Relative population of rotational levels

B.Degeneracy of rotational level

C.Both 1 and 2*

D.None of these

Ans:C

34.Symmetric top molecules have

A.Two moments of inertia equal and third different*

B.All the three moments of inertia equal

C.All the three moments of inertia different

D.None of these

Ans:A

35.The vibrating stretching frequency of a diatomic molecule depends on

A.Force constant

B.Masses of two atoms

C.Both 1 and 2*

D.None of these

Ans:C

36.Identify the spectra corresponds to the frequency 15000’cm-1’

A.Visible*

B.IR

C.NMR

D.Microwave

Ans:A

37.Raman lines on the low frequency side of the excitation frequency are called

A.Stokes lines*

B.Antistokes lines

C.Rayleigh line

D.None of these

Ans:A

38.The shift of an absorption maximum towards longer wavelength  is known as

A.Hyposochromic effect

B.Bathochromic effect*

C.Hyperchromic effect

D.Hypochromic effect

Ans:B

39.In Mossbauer spectroscopy,the main hyperfine interaction/s is/are

A.Isomer shift

B.Quadrupole splitting

C.Nuclear Zeeman splitting

D.All*

Ans:D

40.A naturally occurring dye

A.Indigo*

B.Malachite green

C.Aniline yellow

D.Methyl orange

Ans:A

41.An antimalarial drug is

A.Chloramphenicol

B.Pamaquin*

C.Equanil

D.Veronal

Ans:B

42.Heat capacity of species is independent of temperature if it is

A.Tetratomic

B.Triatomic

C.Diatomic

D.Monatomic*

Ans:D

43.Gold number gives

A.The number of gold atoms present in 1 g of gold

B.The number of gold atoms required to coagulate 1 g of the colloidal solution

C.The number of gold atoms present in 1 g of gold alloy

D.None of these*

Ans:D

44.Which of the following is incorrect?

A.Chemisorption is caused  by bond formation

B.Chemisorption doesnot extend beyond a monolayer

C.Chemisorption is reversible*

D.Chemisorption increases with increase in temperature

Ans:C

45.Reversible adiabatic expansion of an ideal gas is an example of

A.Isoenthalpic process

B.Isoentropic process*

C.Isothermal process

D.Isobaric process

Ans:B

46.Which of the following is a spontaneous process associated with negative entropy change?

A.Evaporation of a liquid

B.Decomposition of ‘AgClO_2’

C.Dissolution of HCL gas in water*

D.Acid-base neutralization reaction

Ans:C

47.What happens to the equilibrium constant of a reaction if the stochiometric coefficient in the balanced chemical equation is doubled?

A.Twiced

B.Squared*

C.Halved

D.No change

Ans:B

48.The maximum number of phases possessed by an invariant system consisting of three components is

A.3

B.2

C.5*

D.4

Ans:C

49.The solution of the radial wave function of a hydrogen atom can be obtained from

A.Legendre polynomial

B.Associated laguerre polynomial*

C.Hermite polynomial

D.Associated legendre polynomial

Ans:B

50.The number of ‘^13C_’signals in naphthalene is

A.5

B.2

C.7

D.3*

Ans:D

51.Which one of the following shows the highest bascicity?

A.La(OH)_3*

B.Nd(OH)-3

C.Eu(OH)_3

D.Lu(OH)_3

Ans:A

52.In the vibrational spectrum of ‘CO_2’the number of fundamental vibrational modes common in both infrared and Raman are

A.3

B.2

C.1

D.0*

Ans:D

53.The electronegativity difference is highest for the pair

A.Li,Cl

B.K,F*

C.Na,Cl

D.Li,F

Ans:B

54.The correct set of biologically essential element is

A.Fe,Mo,Cu,Zn*

B.Fe,Cu,Co,Ru

C.Cu,Mn,Zn,Ag

D.Fe,Ru,Zn,Mg

Ans:A

55.The molecule that has ‘S_4’symmetry element is

A.’C_6H_6’

B.’CH_4’*

C.’C0_2’

D.’C_2H_2’

Ans:B

56.Identify the point group of ‘PCI_5’

A.’C_3_V’

B.’C_3_h’

C.’D_3_h’*

D.None of these

Ans:C

57.Which is an abelian group?

A.Cyclic group*

B.Acyclic group

C.Square planar group

D.Octahedral group

Ans:A

58.Which of the following molecules have center of symmetry?

A.’CH_4’

B.’SO_2’

C.’C_6H_6’*

D.’SF_4’

Ans:C

59.Sum of squares of the dimensions of the irreducible representation of a group will be equal to

A.Order of the group*

B.Character of the group

C.Square of the group

D.None of these

Ans:A

60.The stable end product of Uranium series is

A.’_83Bi^209’

B.’_82Pb^206””*

C.’_82Pb^207’

D.’_82Pb^209’

Ans:B

61.Intersystem crossing is essential for

A.Phosphorescence*

B.Fluroscence

C.Photosensitisation

D.Chemiluminescence

Ans:A

62.The lowest lattice energy among the following crystals is

A.NaCl

B.KCl

C.RbCl

D.CsCl*

Ans:D

63.Improper rotation axis contains

A.Reflection and refraction

B.Rotation and reflection*

C.Inversion and refraction

D.Center of symmetry and rotation

Ans:B

64.Which among the following state functions is an extensive property of the system?

A.Temperature

B.Volume*

C.Viscosity

D.Refractive index

Ans:B

65.The splitting of spectral lines in an electric field is called

A.Zeeman effect

B.Photoelectric effect

C.Stark effect*

D.Thomson effect

Ans:C

66.Which is true about the isobars?

A.They have same mass number and same atomic number

B.They have same mass number and different atomic number*

C.They have different mass number and same atomic number

D.They have different mass number and different atomic number

Ans:B

67.’CO_2’is isostructural with

A.’H_20’

B.’N0_2’

C.’H_2S_’

D.’C_2H_2’*

Ans:D

68.According to Wade’s rule,’C_2B_4H_8’adopts

A.Closo-structure

B.Arachno-structure

C.Nido-structure*

D.Hypho-structure

Ans:C

69.Which is more basic?

A.Pyridine

B.Pyrimidine

C.Pyrrole

D.Piperidine*

Ans:D

70.Chloropicrin is

A.’CH_3NO_2’

B.’Cl_3CNO_2’*

C.’CHCl_3’

D.None of these

Ans:B

71.Which one of the following is a vat dye?

A.Alizarin

B.Indigo*

C.Malachite green

D.Martius yellow

Ans:B

72.Patterno-Buchi reaction is

A.Rearrangement of ‘alpha’,’beta’-unsaturated ketone

B.Photosensitisation of butadiene

C.Photochemical oxidation

D.Cycloaddition of carbonyl compound to alkene*

Ans:D

73.An antiredeposition agent in detergents

A.STPP

B.CMC*

C.SDS

D.Sodium perborate

Ans:B

74.p-azoxyanisole is an example of

A.Semiconductor

B.Super conductor

C.Liquid crystal*

D.None of these

Ans:C

75.Which of the following will occur farthest downfield in ‘^|H’-‘NMR’spectrum?

A.Benzene

B.Ethyne

C.Dimethyl ether

D.Formaldehyde*

Ans:D

76.One mole of sugar is dissolved in three mole of water.The relative lowering of vapor pressure is

A.1/2

B.1/3

C.1/4*

D.1/5

Ans:C

77.Which one of the following solutions would produce maximum elevation in boiling point?

A.0.1 M glucose

B.0.2 M sucrose

C.0.1 M ‘Ba’(NO_3_)_2*

D.0.1 M’MgSO_4’

Ans:C

78.Isotonic solutions have

A.Same freezing point

B.Same boiling point

C.Same viscosity

D.Same osmotic pressure*

Ans:D

79.The metal iron present in phosphotranferase enzyme is

A.Mg*

B.Fe

C.P

D.Ni

Ans:A

80.The number of metal meta bonds present in

‘Cu_2’’(RCOO)_4’.’2H_(2)o’

A.1*

B.2

C.4

D.0

Ans:A

81.Which of the following is used as an anaesthetic?

A.’N_2 O’*

B.’NO’

C.’N_2O_3’

D.’N_2O_5’

Ans:A

82.Which of the following pairs has the highest difference in their first ionization energy?

A.Xe,Cs

B.Kr,Rb

C.Ar,K

D.Ne,Na*

Ans:D

83.The ligand in chromocene

A.C₅H₅^2-*

B.C₈H₈^2-

C.C₆H₆

D.C₄H₄^2-

Ans:A

84.Calculate the number of micro states for 5 identical paricles with their occupation numbers(1,2,3)in three states

A.6

B.12

C.10*

D.720

Ans:C

85.The aggregation of surfactant molecules is known as

A.Micelles*

B.Clustures

C.Gel

D.Colloid

Ans:A

86.In the Lindmann mechanism of uni molecular reactions,the observed order at very high pressure is

A.0.5

B.2

C.1.5

D.1*

Ans:D

87.Which of the following is not a fermion?

A.Proton

B.Electron

C.Neutron

D.Photon*

Ans:D

88.An aqueous solution of NaCl and HCl is exactly neutralized  by an aqueous NaOH solution.The number of components in the final mixture is

A.1

B.2*

C.3

D.4

Ans:B

89.The inter planar distance (A⁰)for a(100)plane in a cubic structure with the lattice parameter of 4A⁰ is

A.1

B.2

C.4*

D.8

Ans:C

90.The heterocyclic ring present in the amino acid histidine is

A.Pyridine

B.Tetrahydropyrrol

C.Indole

D.Imidazole*

Ans:D

91.The biosynthetic precursor of cholesterol is

A.Shikimic acid

B.Mevalonic acid*

C.Gutaric acid

D.Cinnamic acid

Ans:B

92.In the IR spectrum,the absorption band due to carbonyl group in phenyl acetate appears at

A.1760 ‘cm^-1’*

B.1800’cm^-1’

C.1710’cm^-1’

D.1660’cm^-1’

Ans:A

93.The compound that will behave as an acid in liquid HF is

A.’CH 3’’COOH’

B.’HNO_(3)’

C.’BF_(3)’*

D.’H_(2)SO_(4)’

Ans:C

94.Among the oxidesofnitrogen’N_(2)”0_(3)’,’N_(2)”O_(4) and ‘N_(2)”O_(5)’,the compound(s)having N-N bond is/are

A.’N_(2)O_(4) and N_(2)O_(5)

B. N_(2)O_(3) and N_(2)O_(5)

C. N_(2)O_(3) and N_(2)O_(4)*

D. ‘N_(2)O_(5)’’only’

Ans:C

95.A triclinic crystal is

A.’KNO_(3)’

B.’CuSO_(4).5H_(2)’’O’*

C.’NaCl’

D.’CsCl’

Ans:B

96.The  liquid crystals have

A.Properties of supercooled liquids

B.Properties of amorphous solids

C.The fluidity of a liquid and optical properties of a solid*

D.None of these

Ans:C

97.X-ray diffraction does not give any structural information for

A.Metallic solids

B.Ionic solids

C.Molecular solids

D.Amorphous solid*

Ans:D

98.Among the following,an example of a green synthesis is

A.Synthesis of malachite green

B.Friedal-Craft’s acylation of anisole with’Ac_(2)”0’/ anhydrous ‘AlCl_(3)’

C.Jone’s oxidation of benzyl alcohol to benzoic acid

D.Diel’s-Alder reaction of furan and maleic acid in water*

Ans:D

99.Monosaccharide is not react with

A.Tollern’s reagent

B.Sodium bisulphate*

C.Acetic anhydride

D.Hydroxylamine

Ans:B

100.Select the polar aprotic solvent from the following

A.DMF

B.DMSO

C.THF

D.All of these*

Ans:D