AFMC Year 2007 Chemistry Question Paper

Total Questions:50 Total Time: 60 Min

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Questions 1 of 50

Question:If the wavelength of photon is 2.2 x 10\(^{ - 11}\)m, h = 6.6 x 10\(^{ - 34}\) J-s, then momentum of photon is

Answers Choices:

3 x l0\(^{ - 23}\)kgms\(^{ - 1}\)

3.33 x l0\(^{22}\) kgms\(^{ - 1}\)

1.452 x 10\(^{ - 44}\)kg ms\(^{ - 1}\)

6.89 x 10\(^{43}\) kgms\(^{ - 1}\)

Questions 2 of 50

Question:In a given atom no two electrons can have the same values for all the four quantum numbers. This is called

Answers Choices:

Hunds rule

Aufbaus principle

Uncertainty principle

Paulis exclusion principle

Questions 3 of 50

Question:Which of the following particle is emitted in the reaction ? \(_{{\rm{13}}}{\rm{A}}{{\rm{l}}^{{\rm{27}}}}{ + _{\rm{2}}}{\rm{H}}{{\rm{e}}^{\rm{4}}}{ \to _{{\rm{14}}}}{{\rm{P}}^{{\rm{3}}0}} + ...\)

Answers Choices:

\(_0{n^1}\)

\(_{ - 1}{e^0}\)

\(_1{H^1}\)

\(_1{H^2}\)

Questions 4 of 50

Question:For reaction, \(2NOC1(g) \leftrightarrow NO(g) + C{I_2}(g)\), \({{\rm{K}}_{\rm{c}}}\) at 427\(^\circ \)C is 3 x 10\(^{ - 6}\) L mol\(^{ - 1}\). The value of \({K_p}\) is nearly

Answers Choices:

7.5 x 10\(^{ - 5}\)

2.5 x 10\(^{ - 5}\)

2.5 x 10\(^{ - 4}\)

1.72 x 10\(^{ - 4}\)

Questions 5 of 50

Question:What is the order of a reaction which has a rate expression rate = \(k{(A)^{3/2}}{(B)^{ - 1}}\)

Answers Choices:

3/2

1/2

0

None of these

Questions 6 of 50

Question:Which compound is highest covalent ?

Answers Choices:

LiCl

LiF

LiBr

Lil

Questions 7 of 50

Question:Shape of XeF\(_4\) molecule is

Answers Choices:

linear

pyramidal

tetrahedral

square planar

Questions 8 of 50

Question:An aqueous solution of glucose is 10% in strength. The volume in which 1 g mole of it is dissolved will be

Answers Choices:

18 L

9L

0.9 L

1.8 L

Questions 9 of 50

Question:Which one of the following elements has the highest ionisation energy ?

Answers Choices:

\(\left[ {{\rm{Ne}}} \right]{\rm{3}}{{\rm{s}}^{\rm{2}}}{\rm{3}}{{\rm{p}}^{\rm{1}}}\)

\(\left[ {{\rm{Ne}}} \right]{\rm{3}}{{\rm{s}}^{\rm{2}}},{\rm{ 3}}{{\rm{p}}^{\rm{2}}}\)

\(\left[ {{\rm{Ne}}} \right]{\rm{3}}{{\rm{s}}^{\rm{2}}}{\rm{3}}{{\rm{p}}^{\rm{3}}}\)

\(\left[ {{\rm{Ar}}} \right]{\rm{3d}}^\circ {\rm{4}}{{\rm{s}}^{\rm{2}}}{\rm{4}}{{\rm{p}}^{\rm{2}}}\)

Questions 10 of 50

Question:Important ore of zinc is

Answers Choices:

calamine

cryolite

cassiterite

malachite

Questions 11 of 50

Question:A metal which is refined by polling is

Answers Choices:

sodium

blister copper

zinc

silver

Questions 12 of 50

Question:Nesslers reagent is

Answers Choices:

\({\rm{KHg}}{{\rm{I}}_{\rm{4}}}\)

\({{\rm{K}}_{\rm{2}}}{\rm{Hg}}{{\rm{I}}_{\rm{4}}} + {\rm{ N}}{{\rm{H}}_{\rm{4}}}{\rm{OH}}\)

\({{\rm{K}}_{\rm{2}}}{\rm{Hg}}{{\rm{I}}_{\rm{4}}} + {\rm{ KOH}}\)

\({\rm{KHg}}{{\rm{I}}_{\rm{4}}} + {\rm{N}}{{\rm{H}}_{\rm{4}}}{\rm{OH}}\)

Questions 13 of 50

Question:A brown ring appears in the test for

Answers Choices:

nitrate

nitrite

bromide

iron

Questions 14 of 50

Question:Potassium is kept in

Answers Choices:

alcohol

water

kerosene

liquid ammonia

Questions 15 of 50

Question:Glauber salt is

Answers Choices:

\(MgS{O_4}.{H_2}O\)

\({\rm{CuS}}{O_{\rm{4}}}.{\rm{5}}{{\rm{H}}_{\rm{2}}}O\)

\({\rm{FeS}}{O_{\rm{4}}}.{\rm{7}}{{\rm{H}}_{\rm{2}}}O\)

\(N{a_2}S{O_4}.10{H_2}O\)

Questions 16 of 50

Question:The liquid field metal expanding on solidification is

Answers Choices:

Ga

Al

Zn

Cu

Questions 17 of 50

Question:Which of the following oxides of nitrogen is the anhydride of nitrous acid ?

Answers Choices:

\(NO\)

\({N_2}{O_3}\)

\({N_2}{O_4}\)

\({N_2}{O_5}\)

Questions 18 of 50

Question:Which one below is a pseudohalide ?

Answers Choices:

\(C{N^ - }\)

\(ICl\)

\(I{F_5}\)

\({I_3}^ - \)

Questions 19 of 50

Question:Which of the following gas mixture is used by the divers inside the sea ?

Answers Choices:

\({O_{\rm{2}}} + {\rm{He}}\)

\({O_{\rm{2}}} + Xe\)

\({O_{\rm{2}}} + Ar\)

\({O_{\rm{2}}} + {N_2}\)

Questions 20 of 50

Question:In which of the following metallic bond is strongest ?

Answers Choices:

Fe

Sc

V

Cr

Questions 21 of 50

Question:Acidified potassium permanganate solution is decolourised by

Answers Choices:

bleaching powder

white vitriol

Mohrs salt

microcosmic salt

Questions 22 of 50

Question:The pressure and temperature of 4 dm\(^3\)of carbon dioxide gas are doubled. Then volume of carbon dioxide gas would be

Answers Choices:

2 dm\(^3\)

3 dm\(^3\)

4 dm\(^3\)

8 dm\(^3\)

Questions 23 of 50

Question:An fee unit cell of aluminium contains the equivalent of how many atoms ?

Answers Choices:

1

2

3

4

Questions 24 of 50

Question:Hess law deals with

Answers Choices:

changes in heat of reaction

rate of reaction

equilibrium constant

influence of pressure on volume of gas

Questions 25 of 50

Question:By adding 20 mL 0.1 N-HC1 to 20 mL 0.001 N KOH, the pH of the obtained solution will be

Answers Choices:

2

1.3

0

7

Questions 26 of 50

Question:Hydrolysis of sodium acetate will give

Answers Choices:

acidic solution

basic solution

neutral solution

normal solution

Questions 27 of 50

Question:Which of the following is not a non-electrolyte ?

Answers Choices:

Acetic acid

Glucose

Ethanol

Urea

Questions 28 of 50

Question:When lead storage battery is charged

Answers Choices:

lead dioxide dissolves

sulphuric acid is regenerated

the lead electrode becomes coated with lead sulphate

the amount of sulphuric acid decrease

Questions 29 of 50

Question:The oxidation state of S in \({H_2}{S_2}{O_8}\) is

Answers Choices:

2

4

6

7

Questions 30 of 50

Question:The equation for Freundlich adsorption isotherm is

Answers Choices:

\(\frac{x}{m} = k{p^{1/m}}\)

\(x = mk{p^{1/n}}\)

\(\frac{x}{m} = k{p^{ - n}}\)

All of these

Questions 31 of 50

Question:Example of intrinsic colloid is

Answers Choices:

glue

sulphur

Fe

\(A{s_2}{S_3}\)

Questions 32 of 50

Question:Which of the following free radicals is the most stable ?

Answers Choices:

Primary

Methyl

Secondary

Tertiary

Questions 33 of 50

Question:Which of the following will have a meso isomer also?

Answers Choices:

2, 3-dichloropentane

2, 3-dichlorobutane

2-chlorobutane

2-hydroxy propanoic acid

Questions 34 of 50

Question:The correct IUPAC name of the compound

Answers Choices:

4 methoxy-2- nitrobenzaldehyde

4- formyl -3 nitro anisole

4- methoxy -6- nitro benzladehyde

2- formyl -5- methoxy nitrobenzene

Questions 35 of 50

Question:Which of the following has highest knocking property ?

Answers Choices:

Aromatic hydrocarbons

Olefins

Branched chain paraffins

Straight chain paraffins

Questions 36 of 50

Question:Which of the following is the most stable alkene ?

Answers Choices:

\({R_2}C = C{R_2}\)

\(RCH = CHR\)

\(RCH = C{H_2}\)

\(C{H_2} = C{H_2}\)

Questions 37 of 50

Question:In which alkyl halide, \({S_N}2\) mechanism is favoured maximum

Answers Choices:

\({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{C1}}\)

\({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{C1}}\)

\({\left( {{\rm{C}}{{\rm{H}}_{\rm{3}}}} \right)_{\rm{2}}}{\rm{CHC1}}\)

\({\left( {{\rm{C}}{{\rm{H}}_{\rm{3}}}} \right)_{\rm{3}}}{\rm{C}} - {\rm{C1}}\)

Questions 38 of 50

Question:In the following reaction A is \({C_2}{H_5}MgBr + \mathop {\mathop {{H_2}C - C{H_2}}\limits_{\backslash \,\,\,\,\,\,\,\,\,\,\,\,\,/} }\limits_O\) \( \to A\)

Answers Choices:

\({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{CHO}}\)

\({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{OH}}\)

\({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{C}}{{\rm{H}}_{\rm{2}}}{\rm{OH}}\)

\({{\rm{C}}_{\rm{2}}}{{\rm{H}}_{\rm{5}}}{\rm{CHO}}\)

Questions 39 of 50

Question:From Williamsons synthesis preparation of which of the following is possible ?

Answers Choices:

Only symmetrical ethers

Only asymmetrical ethers

Both (1) and (2)

None of the above

Questions 40 of 50

Question:Find the correct answer for the below given questtion image

Answers Choices:

Questions 41 of 50

Question:Dry heating of calcium acetate gives

Answers Choices:

acetaldehyde

ethane

acetic acid

acetone

Questions 42 of 50

Question:Formaldehyde reacts with ammonia to give I urotropine is

Answers Choices:

\({\left( {{\rm{C}}{{\rm{H}}_{\rm{2}}}} \right)_{\rm{6}}}{{\rm{N}}_{\rm{4}}}\)

\({\left( {{\rm{C}}{{\rm{H}}_{\rm{2}}}} \right)_{\rm{4}}}{{\rm{N}}_{\rm{3}}}\)

\({\left( {{\rm{C}}{{\rm{H}}_{\rm{2}}}}\right)_{\rm{6}}}{{\rm{N}}_{\rm{6}}}\)

\({\left( {{\rm{C}}{{\rm{H}}_{\rm{2}}}} \right)_{\rm{3}}}{{\rm{N}}_{\rm{3}}}\)

Questions 43 of 50

Question:The reagent which does not give acid chloride on treating with a carboxylic acid is

Answers Choices:

\({\rm{PC}}{{\rm{l}}_{\rm{5}}}\)

\({\rm{C}}{{\rm{l}}_{\rm{2}}}\)

\({\rm{SOC}}{{\rm{l}}_{\rm{2}}}\)

\({\rm{PC}}{{\rm{l}}_3}\)

Questions 44 of 50

Question:Aniline react with acetaldehyde to form

Answers Choices:

Schiffs base

carbyl amine

immine

none of these

Questions 45 of 50

Question:Three dimensional molecules with cross links are formed in the case of a

Answers Choices:

thermoplastic

thermosetting plastic

both (1) and (2)

none of the above

Questions 46 of 50

Question:The reagent which forms crystalline osazone derivative when reacted with glucose, is

Answers Choices:

Fehling solution

phenyl hydrazine

Benedict solution

hydroxyl amine

Questions 47 of 50

Question:Insulin is

Answers Choices:

an amino acid

a protein

a carbohydrate

a lipid

Questions 48 of 50

Question:Which of the following polymer has ester linkage ?

Answers Choices:

Nylon-66

PVC

Terylene

SBR

Questions 49 of 50

Question:Chloramine-T is a

Answers Choices:

disinfectant

antiseptic

analgesic

antipyretic

Questions 50 of 50

Question:Which one is disperse dye ?

Answers Choices:

Congo red

Alizarin

Celliton

None of these