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46. Consider the molecules 4 3,CH NH and 2H O .

Which of the given statements is false ?

(1) The H C H- - bond angle in 4 ,CH

the H N H- - bond angle in 3NH , and

the H O H- - bond angle in 2H O are

all greater than 90°

(2) The H O H- - bond angle in 2H O is

larger than the H C H- - bond angle in

4CH

(3) The H O H- - bond angle in 2H O is

smaller than the H N H- - bond angle in

3NH

(4) The H C H- - bond angle in 4CH is

larger than the H N H- - bond angle in

3NH

46.(2)

47. In the reaction

2 3 2 3

3 2 3 2

(1) / . (1) / .

(2) (2)

NaNH liq NH NaNH liq NHH C H X Y

CH CH Br CH CH Br- º

X and Y are :

(1) 1X = -Butyne ; 3Y = -Hexyne




47.(1)

48. Among the following, the correct order of acidityis :

(1) 3 4 2HClO HClO HClO HClO< < <




48.(2) Acidic strength . .EN ve O Sµ µ +

2 3 4HClO HClO HClO HClO< < <

1+ 3+ 5+ 7+

49. The rate of a first-order reaction is 0.04

mol 1 1l s- - at 10 seconds and 1 10.03mol l s- -

at 20 seconds after initiation of the reaction.

The half-life period of the reaction is :

(1) 24.1s (b) 34.1s

(3) 44.1s (d) 54.1s

49.(1)1

2 1 2

( )2.303log

( ) ( )

a xK

t t a x

-=

- -

2.303 (0.04)log

(20 10) (0.03)K =

-

2.303 0.1249

10K

´=

Our Top class IITian & Doctor faculty team promises to give you an authentic solutionwhich will be fastest in the whole country.

FEEL THE POWER OF OUR KNOWLEDGE & EXPERIENCE

SOLUTION OF NEET PHASE-1/ AIPMT - 2016(HELD ON 1st MAY SUNDAY 2016)

(All Code - A/P/W, B/Q/X, C/R/Y, D/S/Z)

SOLUTION [CHEMISTRY]




2

1/ 2

2.303 log 2.303 0.1249

10t

´ ´=

1/ 2

0.3010 1024.1sec

0.1249t

´= =

50. Which one of the following characteristics isassociated with adsorption ?

(1) GD is negative but HD and SD are

positive

(2) GD , HD and SD all are negative

(3) GD and HD are negative but SD is

positive

(4) GD and SD are negative but HD is

positive

50.(2) Adsorption is spontaneous process,

so GD = negative

Adsorption is exothermic process,

so HD = negative

In adsorpiton entropy decreases,

so SD = negative

so ,G HD D and SD all are negative

51. In which of the following options the order ofarrangement does not agree with the variationof property indicated against it ?

(1) 3 2Al Mg Na F+ + + -< < < (increasing

ionic size)

(2) B C N O< < < (increasing first ionisation

enthalpy)

(3) I Br Cl F< < < (increasing electron gain

enthalpy)

(4) Li Na K Rb< < < (increasing metallic

radius)

51.(2 & 3)

(2) B C N O< < < (given I.P. order)

B C O N< < < (correct)

(3) I Br Cl F< < < (given egHD order)

I Br F Cl< < < (Correct)

52. Which of the following statements is false ?

(1) 2Mg + ions form a complex with ATP

(2) 2Ca + ions are important in blood clotting

(3) 2Ca + ions are not important in maintaining

the regular beating of the heart

(4) 2Mg + ions are important in the green partss

of plants

52.(3)

53. Which of the following statements abouthydrogen is incorrect ?

(1) Hydrogen has three isotopes of which tritiumis the most common

(2) Hydrogen never acts as cation in ionic salts

(3) Hydronium ion, 3H O+ exists freely in

solution

(4) Dihydrogen does not act as a reducing agent

53.(1)

54. The correct statement regarding a carbonylcompound with a hydrogen atom on itsalphacarbon, is :

(1) a carbonyl compound with a hydrogen atomon its alpha-carbon never equilibrates withits corresponding enol.

(2) a carbonyl compound with a hydrogen atomon its alpha-carbon rapidly equilibrates withits corresponding enol and this process isknown as aldehyde-ketone equilibration.

(3) a carbonyl compound with a hydrogen atomon its alpha-carbon rapidly equilibrates withits corresponding enol and this process isknown as carbonylation.

(4) a carbonyl compound with a hydrogen atomon its alpha-carbon rapidly equilibrates withits corresponding enol and this process isknown as keto-enol tautomerism.

54.(4) Keto-enol Tautomerism

55. MY and 3NY , two nearly insoluble salts, have

the same spK values of 136.2 10-´ at room

temperature. Which statement would be true in

regard to MY and 3NY ?

(1) The molar solubilities of MY and 3NY in

water are identical

(2) The molar solubility of MY in water is less

than that of 3NY

(3) The salts MY and 3NY are more soluble

in 0.5M KY than in pure water




(4) The addition of the salt of KY to solution of

MY and 3NY will have no effect on their

solubilities

55.(2)2 136.2 10spMY K s -® = = ´

136.2 10s -= ´

7 17.87 10s mol L- -= ´

4 133 27 6.2 10spNY K s -® = = ´

1/ 4136.2 10

27s

-æ ö´= ç ÷è ø

4 13.89 10s mol L- -= ´

\ molar solubility of 3NY is more than MY in

water.

56. In a protein molecule various amino acids arelinked together by :

(1) a -glycosidic bond

(2) b -glycosidic bond

(3) peptide bond

(4) dative bond

56.(3) Peptide bond

57. Natural rubber has

(1) All cis-configuration

(2) All trans-configuration

(3) Alternate cis-and trans-configuration

(4) Random cis-and trans-configuration

57.(1)

58. Match items of Column I with the items ofColumn II and assign the correct code :

Code :

(a) (b) (c) (d)

(1) (iv) (ii) (iii) (i)

(2) (ii) (iii) (i) (v)

(3) (i) (ii) (iii) (iv)

(4) (iii) (iv) (v) (i)

58.(1)

59. Which one of the following statements is correct

when 2SO is passed through acidified

2 2 7K Cr O solution ?

(1) The solution turns blue

(2) The solution is decolourized

(3) 2SO is reduced

(4) Green 2 4 3( )Cr SO is formed

59.(4) 2 2 7 2 2 4K Cr O SO H SO+ +

2 4 2 4 3 2( )K SO Cr SO H O® + +

green colour

60. The electronic configuration of Eu(Atomic No.63), Gd(Atomic No. 64) and Tb(Atomic No. 65)are :

(1) 7 2 8 2[ ]4 6 ,[ ]4 6Xe f s Xe f s and 8 1 2[ ]4 5 6Xe f d s

(2) 6 1 2 7 1 2[ ]4 5 6 ,[ ]4 5 6Xe f d s Xe f d s and 9 2[ ]4 6Xe f s

(3) 6 1 2 7 1 2[ ]4 5 6 ,[ ]4 5 6Xe f d s Xe f d s and

8 1 2[ ]4 5 6Xe f d s

(4) 7 2 7 1 2[ ]4 6 ,[ ]4 5 6Xe f s Xe f d s and 9 2[ ]4 6Xe f s

60.(4)

61. Two electrons occupying the same orbital aredistinguished by :

(1) Principal quantum number

(2) Magnetic quantum number

(3) Azimuthal quantum number

(4) Spin quantum number

61.(4) Two electrons occupying the same orbital differby spin quantum number.

62. When copper is heated with conc. 3HNO it

produces

(a) 3 2( )Cu NO and 2NO

(b) 3 2( )Cu NO and NO

(c) 3 2( ) ,Cu NO NO and 2NO

(d) 3 2( )Cu NO and 2N O




62.(1) 3 3 2 2 24 ( .) ( ) 2 2Cu HNO conc Cu NO NO H O+ ® + +

63. Which of the following reagents would distingusih

cis-cyclopenta 1,2- -diol from the trans-isomer?

(a) Acetone

(b) Ozone

(c) 2MnO

(d) Aluminium isopropxide

63.(1) Acetone

64. The correct thermodynamic conditions for thespontaneous reaction at all temperatures is :

(a) 0HD < and 0SD =

(b) 0HD > and 0SD <

(c) 0HD < and 0SD >

(d) 0HD < and 0SD <

64.(3) .G H T SD = D - D

For, 0HD < and 0,S G veD > D = - (always)

\ spontaneous at all temperatures

65. Lithium has a bcc structure. Its density is3530kg m- and its atomic mass is 16.94 g mol- .

Calculate the edge length of a unit cell of Lithium

metal. (23 16.02 10AN mol -= ´ )

(1) 154 pm (2) 352 pm

(3) 527 pm (4) 264 pm

65.(2) 3A

Z M

N ar

´=

´

For bcc structure

3 32, 530 0.530Z kg m g cmr - -= = =

23 3

2 6.940.530

6.02 10 a

´=

´ ´

3 23 34.348 10a cm-= ´

83.52 10a cm-= ´

352a pm=

66. Which one of the following orders is correct forthe bond dissociation enthalpy of halogenmolecules ?

(1) 2 2 2 2I Br Cl F> > >

(2) 2 2 2 2Cl Br F I> > >

(3) 2 2 2 2Br I F Cl> > >

(4) 2 2 2 2F Cl Br I> > >

66.(2) 2 2 2 2Cl Br F I> > >

¯

due to high lp lp- repulsion

67. Which of the following is an analgesic ?

(1) Novalgin (2) Penicillin

(3) Streptomycin (4) Chloromycetin

67.(1) Novalgin used as analgesic.

68. Equal moles of hydrogen and oxygen gases areplaced in a container with a pin-hole throughwhich both can escape. What fraction of theoxygen escapes in the time required for one-half of the hydrogen to escape ?

(1) 1/8 (2) 1/4

(3) 3/8 (4) 1/2

68.(1)2 2H On n= and

2 2H Ot t=

According to Graham’s law

2 2

2 2

1 1

2 2

/ 32

/ 2

H O

O H

r M v t

r M v t= Þ =

1/ 216 4

1/ x= =

42

x=

\ 8x =

\ Fraction of 2 1/ 8O =

69. Consider the nitration of benzene using mixed

conc. 2 4H SO and 3HNO . If a large amount of

4KHSO is added to the mixture, the rate of

nitration will be:-

(1) faster (2) slower

(3) unchanged (4) doubled

69.(2) Slower, as large amount of 4HSO- will decrease

ionisation of 2 4H SO that result in lesser

ionisation of nitric acid and lesser formation of

nitronium ion 2[ ]NO+

70. Predict the correct order among the following :

(1) lone pair- lone pair > lone pair - bond pair >bond pair - bond pair

(2) lone pair - lone pair > bond pair - bond pair> lone pair - bond pair

(3) bond pair - bond pair > lone pair - bond pair> lone pair - lone pair

(4) lone pair - bond pair > bond pair - bond pair> lone pair - lone pair




77. The ionic radii of AÅ and BQ ions are

100.98 10 m-´ and 101.81 10 m-´ . The

coordination number of each ion in AB is :

(1) 6 (2) 4

(3) 8 (4) 2

77.(1) radii ratio

10

10

0.98 100.54

1.81 10

r

r

-+

--

´= = =

´

radii ratio is in between 0.414 to 0.732

so, coordination number is 678. Which is the correct statement for the given

acids?

(1) Phosphinic acid is a diprotic acid whilephosphonic acid is a monoprotic acid

(2) Phosphinic acid is a monoprotic acid whilephosphonic acid is a diprotic acid

(3) Both are triprotic acids

(4) Both are diprotic acids

78.(2) Phosphinic acid 3 2( )H PO

79. Fog is colloidal solution of :

(1) Liquid in gas (2) Gas in liquid

(3) Solid in gas (4) Gas in gas

79.(1) Fog is a colloidal solution of liquid in gas.

80. Which of the following statement about the

composition of the vapour over an ideal 1:1molar mixture of benzene and toluene iscorrect? Assume that the temperature is

constant at 25 C° . (Given : Vapour Pressure

Data at 25 C° , benzene = 12.8 ,kPa Toluene =

3.85kPa )

(1) The vapour will contain a higher percentageof benzene

(2) The vapour will contain a higher percentageof toluene

(3) The vapour will contain equal amounts ofbenezene and toluene

(4) Not enough information is given to make apredication

80.(1) A®benzene, B® toluene

1:1 molar mixture of A and B

\1

2Ax = and

1

2Bx =

0 0s A A B BP P X P X= +

1 112.8 3.85 8.325

2 2sP kPa= ´ + ´ =

01

12.82 0.768

8.325A A

A

s

P XY

P

´= = =

\ 1 1 0.768 0.232B AY Y= - = - =

so, the vapour will contain higher percentage ofbenzene.

81. The correct statement regarding thecomparison of staggered and eclipsedconformation of ethane, is :

(1) The staggered conformation of ethane isless stable than eclipsed conformation,because staggered conformation hastorsional strain

(2) The eclipsed conformation of ethane is morestable than staggered conformation,because eclipsed conformation has notorsional strain

(3) The eclipsed conformation of ethane is morestable than staggered conformation eventhrough the eclipsed conformation hastorsional strain

(4) The staggered conformation of ethane ismore stable than eclipsed conformation,because staggered conformation has notorsional strain.

81.(4)




82. The reaction

Can be classified as :

(1) Williamson ether synthesis reaction

(2) Alcohol formation reaction

(3) Dehydration reaction

(4) Williamson alcohol synthesis reaction

82.(1) This is an exmaple of Williamson ether syntehsisreaction in which sodium alkoxide reacts withalkyl halide and gives ether.

83. The product formed by the reaction of analdehyde with a primary amine is :

(1) Schiff base (2) Ketone

(3) Carboxylic acid (4) Aromatic acid

83.(1)

84. Which of the following biphenyls is opticallyactive ?

(1) (2)

(3) (4)

84.(2) is optically active due to

absence of plane of symmetry and center ofsymmetry.

85. For the following reactions :

(a) 3 2 2CH CH CH Br KOH+ ®

3 2 2CH CH CH KBr H O= + +

(b)

(c)

Which of the following statements is correct ?

(1) (a) and (b) are elimination reaction and (c)is addition reaction

(2) (a) is elimination, (b) is substitution and (c)is addition reaction

(3) (a) is elimination, (b) and (c) are substitutionreactions

(4) (a) is substitution, (b) and (c) are additionreaction

85.(2)

(a) 3 2 2 3CH CH CH Br KOH CH CH- + ® =

2 2CH KBr H O+ +

breaking of 2s bonds and formation of 1pbond so it is an example of elimination reaction.

(b)

replacement of Br- by OH - is substitution

reaction

(c)

breaking of 1p bond and formation of 2sbonds is addition reaction.

86. At 100 C° the vapour pressure of a solution of

6.5g of a solute in 100 g water is 732mm . If

0.52bK = , the boiling point of this solution will

be :

(1) 101 C° (2) 100 C°

(3) 102 C° (4) 103 C°

86.(1)

0

0s solute solvent

solute solvent

P P w Mn

P N M W

æ ö-= = ´ç ÷

è ø

at 0100 , 760C P mm° =

760 732 6.5 18

760 100soluteM

- ´=

´

131.75soluteM g mol -=




1000soluteb b b

solute solvent

wT m K K

M w

´D = ´ = ´

´

0.52 6.5 10001.06

31.75 100bT C

´ ´D = = °

´

\ boiling point of solution

100 1.06 101C C C= ° + ° = °87. The correct statement regarding RNA and DNA,

respectively is :

(1) The sugar component in RNA is arabinoseand the sugar component in DNA is

2¢ -deoxyribose.

(2) The sugar component in RNA is ribose and

the sugar component in DNA is 2¢ -deoxyribose.

(3) The sugar component in RNA is arabinoseand the sugar component in DNA is ribose.

(4) The sugar component in RNA is

2¢ -deoxyribose and the sugar componentin DNA is arabinose.

87.(2) RNA ¾¾® Ribose Nucleic Acid

DNA ¾¾® 2¢ - Deoxyribose Nucleic Acid

88. The correct statement regarding the basicity ofarylamines is :

(1) Arylamines are generally less basic thanalkylamines because the nitrogen lone-pairelectrons are delocalized by interaction with

the aromatic ring p electron system.

(2) Arylamines are generally more basic thanalkylamines because the nitrogen lone-pair

electrons are not delocalized by interaction

with the aromatic ring p electron system.

(3) Arylamines are generally more basic thanalkylamines because of aryl group.

(4) Arylamines are generally more basic thanalkylamines, because the nitrongen atom inarylamines is sp-hybridized.

88.(1)

* Delocalized lone pair of nitrogen

* less basic

89. Which one given below is a non-reducing sugar?

(1) Maltose (2) Lactose

(3) Glucose (4) Sucrose

89.(4) Sucrose

90. The pair of electron in the given carbanion,

3CH C CQº , is present in which of the following

orbitals ?

(1) 2p (2) 3sp

(3) 2sp (4) sp

90.(4)

solution of neet phase-1/ aipmt - 2016solution of neet phase-1/ aipmt - 2016 (held on 1st may sunday...

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