Q44. Number of complexes from the following with even number of unpaired " $d$ " electrons is $\left[ \mathrm { V } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 3 + } , \left[ \mathrm { Cr } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 2 + } , \left[ \mathrm { Fe } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 3 + } , \left[ \mathrm { Ni } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 3 + } , \left[ \mathrm { Cu } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 2 + }$ [Given atomic numbers : $\mathrm { V } = 23 , \mathrm { Cr } = 24 , \mathrm { Fe } = 26 , \mathrm { Ni } = 28 \mathrm { Cu } = 29 ]$
(1) 2
(2) 1
(3) 4
(4) 5

Q44. When $\mathrm { MnO } _ { 2 }$ and $\mathrm { H } _ { 2 } \mathrm { SO } _ { 4 }$ is added to a salt ( A ), the greenish yellow gas liberated as salt ( A ) is :
(1) $\mathrm { CaI } _ { 2 }$
(2) NaBr
(3) $\mathrm { KNO } _ { 3 }$
(4) $\mathrm { NH } _ { 4 } \mathrm { Cl }$

Q44. The metal that shows highest and maximum number of oxidation state is :
(1) Fe
(2) Mn
(3) Co
(4) Ti

Q44. While preparing crystals of Mohr's salt, dil $\mathrm { H } _ { 2 } \mathrm { SO } _ { 4 }$ is added to a mixture of ferrous sulphate and ammonium sulphate, before dissolving this mixture in water, $\mathrm { dil } \mathrm { H } _ { 2 } \mathrm { SO } _ { 4 }$ is added here to :
(1) prevent the hydrolysis of ferrous sulphate
(2) prevent the hydrolysis of ammonium sulphate
(3) make the medium strongly acidic
(4) increase the rate of formation of crystals

Q44.

	List - I (Compound)		List - II (Uses)
A.	Iodoform	I.	Fire extinguisher
B.	Carbon tetrachloride	II.	Insecticide
C.	CFC	III.	Antiseptic
D.	DDT	IV.	Refrigerants

Choose the correct Match List I with List II answer from the options given below:
(1) A-I, B-II, C-III, D-IV
(2) A-III, B-I, C-IV, D-II
(3) A-II, B-IV, C-I, D-III
(4) A-III, B-II, C-IV, D-I

Q44. Consider the given reaction, identify the major product $P . \mathrm { CH } _ { 3 } - \mathrm { COOH } \xrightarrow [ \text { (iv) } \mathrm { H } _ { 2 } \mathrm { O } / \overline { \mathrm { OH } } , \Delta ] { \text { (i) } \mathrm { LiAlH } _ { 4 } \text { (ii) } \mathrm { PCC } \text { (iii) } \mathrm { HCN } / \overline { \mathrm { OH } } \text { " } \mathrm { P } \text { " } }$
(1) [Figure]
(2) $\mathrm { CH } _ { 3 } - \mathrm { CH } _ { 2 } - \mathrm { CH } _ { 2 } - \mathrm { OH }$
(3) [Figure]
(4) [Figure]
Q45. [Figure]
Consider the above chemical reaction. Product " A " is :
(1) [Figure]
(2) [Figure]
(3) [Figure]
(4) [Figure]
Q46. [Figure]
The major products formed :
A and B respectively are:
(1) [Figure]
and [Figure]
(2) [Figure] and [Figure]
(3) [Figure] and [Figure]
(4) [Figure] and [Figure]
Q47. [Figure]
(i) $\mathrm { NaNO } _ { 2 } + \mathrm { HCl }$
(ii) $\mathrm { Cu } _ { 2 } \mathrm { Cl } _ { 2 }$
(iii) $\mathrm { NaOH } , 623 \mathrm {~K} , 300 \mathrm {~atm}$ (iv) $\mathrm { H } ^ { + }$
Identify the product (A) in the following reaction.
(1) [Figure]
(2) [Figure]
(3) [Figure]
(4) [Figure]

Q44. Number of Complexes with even number of electrons in $t _ { 2 g }$ orbitals is $\left[ \mathrm { Fe } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 2 + } , \left[ \mathrm { Co } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 2 + } , \left[ \mathrm { Co } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 3 + } , \left[ \mathrm { Cu } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 2 + } , \left[ \mathrm { Cr } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 2 + }$
(1) 2
(2) 3
(3) 1
(4) 5

Q44. Given below are two statements : Statement (I) : Fusion of $\mathrm { MnO } _ { 2 }$ with KOH and an oxidising agent gives dark green $\mathrm { K } _ { 2 } \mathrm { MnO } _ { 4 }$. Statement (II) : Manganate ion on electrolytic oxidation in alkaline medium gives permanganate ion. In the light of the above statements, choose the correct answer from the options given below :
(1) Statement I is true but Statement II is false
(2) Both Statement I and Statement II are false
(3) Statement I is false but Statement II is true
(4) Both Statement I and Statement II are true

Q45.

List - I (Complex ion)

List - II

(Spin only magnetic moment in B.M.)

Match List - I with List - II.

(A) $\left[ \mathrm { Cr } \left( \mathrm { NH } _ { 3 } \right) _ { 6 } \right] ^ { 3 + }$
(B) $\left[ \mathrm { NiCl } _ { 4 } \right] ^ { 2 - }$ (III) 0.0 (IV) 2.83
(C) $\left[ \mathrm { CoF } _ { 6 } \right] ^ { 3 - }$ (I) 4.90 (II) 3.87
(D) $\left[ \mathrm { Ni } ( \mathrm { CN } ) _ { 4 } \right] ^ { 2 - }$
Choose the correct answer from the options given below :
(1) (A)-(II), (B)-(III), (C)-(I), (D)-(IV)
(2) (A)-(II), (B)-(IV), (C)-(I), (D)-(III)
(3) (A)-(I), (B)-(IV), (C)-(II), (D)-(III)
(4) (A)-(IV), (B)-(III), (C)-(I), (D)-(II)

Q44. lectronic configuration of $\mathrm { Cu } ( \mathrm { II } )$ is $3 \mathrm {~d} ^ { 9 }$ whereas that of $\mathrm { Cu } ( \mathrm { I } )$ is $3 \mathrm {~d} ^ { 10 }$. Which of the following is correct?
(1) Stability of $\mathrm { Cu } ( \mathrm { I } )$ and $\mathrm { Cu } ( \mathrm { II } )$ depends on nature
(2) $\mathrm { Cu } ( \mathrm { II } )$ is more stable of copper salts
(3) $\mathrm { Cu } ( \mathrm { I } )$ and $\mathrm { Cu } ( \mathrm { II } )$ are equally stable
(4) Cu (II) is less stable

Q44. The coordination environment of $\mathrm { Ca } ^ { 2 + }$ ion in its complex with $\mathrm { EDTA } ^ { 4 - }$ is :
(1) tetrahedral
(2) trigonal prismatic
(3) octahedral
(4) square planar
Q45. [Figure]
In the above reaction product ' P ' is
(1) [Figure]
(2) [Figure]
(3) [Figure]
(4) [Figure]

Q45. The correct sequence of ligands in the order of decreasing field strength is :
(1) $\mathrm { NCS } ^ { - } > \mathrm { EDTA } ^ { 4 - } > \mathrm { CN } ^ { - } > \mathrm { CO }$
(2) $\mathrm { CO } > \mathrm { H } _ { 2 } \mathrm { O } > \mathrm { F } ^ { - } > \mathrm { S } ^ { 2 - }$
(3) $\mathrm { S } ^ { 2 - } > - \mathrm { OH } > \mathrm { EDTA } ^ { 4 - } > \mathrm { CO }$
(4) ${ } ^ { - } \mathrm { OH } > \mathrm { F } ^ { - } > \mathrm { NH } _ { 3 } > \mathrm { CN } ^ { - }$

Q45. A first row transition metal in its + 2 oxidation state has a spin-only magnetic moment value of 3.86 BM . The atomic number of the metal is
(1) 26
(2) 25
(3) 23
(4) 22

Q45. Which one of the following complexes will exhibit the least paramagnetic behaviour? [Atomic number, $\mathrm { Cr } = 24 , \mathrm { Mn } = 25 , \mathrm { Fe } = 26 , \mathrm { Co } = 27 ]$
(1) $\left[ \mathrm { Cr } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 2 + }$
(2) $\left[ \mathrm { Fe } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 2 + }$
(3) $\left[ \mathrm { Co } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 2 + }$
(4) $\left[ \mathrm { Mn } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 6 } \right] ^ { 2 + }$

Q45. The number of complexes from the following with no electrons in the $t _ { 2 }$ orbital is $\mathrm { TiCl } _ { 4 } , \left[ \mathrm { MnO } _ { 4 } \right] ^ { - } , \left[ \mathrm { FeO } _ { 4 } \right] ^ { 2 - } , \left[ \mathrm { FeCl } _ { 4 } \right] ^ { - } , \left[ \mathrm { CoCl } _ { 4 } \right] ^ { 2 - }$
(1) 1
(2) 4
(3) 3
(4) 2

Q45. he following complexes $\left[ \mathrm { CoCl } \left( \mathrm { NH } _ { 3 } \right) _ { 5 } \right] ^ { 2 + } , \left[ \mathrm { Co } ( \mathrm { CN } ) _ { 6 } \right] ^ { 3 - } , \left[ \mathrm { Co } \left( \mathrm { NH } _ { 3 } \right) _ { 5 } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) \right] ^ { 3 + } , \left[ \mathrm { Cu } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 4 } \right] ^ { 2 + }$ The correct
(A)
(B)
(C)
(D) order of $\mathrm { A } , \mathrm { B } , \mathrm { C }$ and D in terms of wavenumber of light absorbed is :
(1) C $<$ D $<$ A $<$ B
(2) B $<$ C $<$ A $<$ D
(3) A $<$ C $<$ B $<$ D
(4) D $<$ A $<$ C $<$ B

Q45. An octahedral complex with the formula $\mathrm { CoCl } _ { 3 } \cdot \mathrm { nNH } _ { 3 }$ upon reaction with excess of $\mathrm { AgNO } _ { 3 }$ solution gives 2 moles of AgCl . Consider the oxidation state of Co in the complex is ' $x$ '. The value of " $x + n$ " is $\_\_\_\_$
(1) 6
(2) 8
(3) 3
(4) 5

Q45. The $\mathrm { F } ^ { - }$ions make the enamel on teeth much harder by converting hydroxyapatite (the enamel on the surface of teeth) into much harder fluoroapatite having the formula.
(1) $\left[ 3 \left( \mathrm { Ca } _ { 3 } \left( \mathrm { PO } _ { 4 } \right) _ { 2 } \right) \cdot \mathrm { Ca } ( \mathrm { OH } ) _ { 2 } \right]$
(2) $\left[ 3 \left( \mathrm { Ca } _ { 3 } \left( \mathrm { PO } _ { 4 } \right) _ { 3 } \right) \cdot \mathrm { CaF } _ { 2 } \right]$
(3) $\left[ 3 \left( \mathrm { Ca } _ { 2 } \left( \mathrm { PO } _ { 4 } \right) _ { 2 } \right) \cdot \mathrm { Ca } ( \mathrm { OH } ) _ { 2 } \right]$
(4) $\left[ 3 \left( \mathrm { Ca } _ { 3 } \left( \mathrm { PO } _ { 4 } \right) _ { 2 } \right) \cdot \mathrm { CaF } _ { 2 } \right]$

45. (4) & 46. (4) & 47. (1) & 48. (1) \hline 53. (400) & 54. (15) & 55. (4) & 56. (23) \hline 61. (1) & 62. (1) & 63. (3) & 64. (1) \hline

Q46. Identify the correct set of reagents or reaction conditions ' $X$ ' and ' $Y$ ' in the following set of transformation [Figure]
(1) $\mathrm { X } =$ \href{http://dil.aq}{dil.aq}. $\mathrm { NaOH } , 20 ^ { \circ } \mathrm { C } , \quad \mathrm { Y } = \mathrm { Br } _ { 2 } / \mathrm { CHCl } _ { 3 }$
(2) $\mathrm { X } =$ conc.alc. $\mathrm { NaOH } , 80 ^ { \circ } \mathrm { C } , \mathrm { Y } = \mathrm { Br } _ { 2 } / \mathrm { CHCl } _ { 3 }$
(3) $\mathrm { X } =$ \href{http://dil.aq}{dil.aq}. $\mathrm { NaOH } , 20 ^ { \circ } \mathrm { C } , \quad \mathrm { Y } = \mathrm { HBr }$ /acetic
(4) $\mathrm { X } =$ conc.alc. $\mathrm { NaOH } , 80 ^ { \circ } \mathrm { C } , \mathrm { Y } = \mathrm { HBr } /$ acetic acid acid

Q46. If an iron (III) complex with the formula $\left[ \mathrm { Fe } \left( \mathrm { NH } _ { 3 } \right) _ { x } ( \mathrm { CN } ) _ { y } \right] ^ { - }$has no electron in its $e _ { g }$ orbital, then the value of $x + y$ is
(1) 4
(2) 5
(3) 6
(4) 3

Q46. The correct order of ligands arranged in increasing field strength.
(1) $\mathrm { F } ^ { - } < \mathrm { Br } ^ { - } < \mathrm { I } ^ { - } < \mathrm { NH } _ { 3 }$
(2) $\mathrm { Br } ^ { - } < \mathrm { F } ^ { - } < \mathrm { H } _ { 2 } \mathrm { O } < \mathrm { NH } _ { 3 }$
(3) $\mathrm { H } _ { 2 } \mathrm { O } < - \mathrm { OH } < \mathrm { CN } ^ { - } < \mathrm { NH } _ { 3 }$
(4) $\mathrm { Cl } ^ { - } < - \mathrm { OH } < \mathrm { Br } ^ { - } < \mathrm { CN } ^ { - }$

Q46. The metal atom present in the complex MABXL (where $\mathrm { A } , \mathrm { B } , \mathrm { X }$ and L are unidentate ligands and M is metal) involves $\mathrm { sp } ^ { 3 }$ hybridization. The number of geometrical isomers exhibited by the complex is:
(1) 2
(2) 0
(3) 4
(4) 3

Q46. Given below are two statements : Statement I : Piciric acid is $2,4,6 -$ trinitrotoluene. Statement II : Phenol - 2,4 - disulphonic acid is treated with Conc. $\mathrm { HNO } _ { 3 }$ to get picric acid. In the light of the above statements, choose the most appropriate answer from the options given below :
(1) Statement I is incorrect but Statement II is
(2) Both Statement I and Statement II are incorrect correct
(3) Statement I is correct but Statement II is
(4) Both Statement I and Statement II are correct incorrect

Q46. Which among the following compounds will undergo fastest $\mathrm { S } _ { \mathrm { N } } 2$ reaction.
(1) [Figure]
(2) [Figure]
(3) [Figure]
(4) [Figure]

Q46. Given below are two statements : Statement (I) : $\mathrm { S } _ { \mathrm { N } } 2$ reactions are 'stereospecific', indicating that they result in the formation of only one stereo-isomer as the product. Statement (II) : $\mathrm { S } _ { \mathrm { N } } 1$ reactions generally result in formation of product as racemic mixtures. In the light of the above statements, choose the correct answer from the options given below :
(1) Both Statement I and Statement II are false
(2) Statement I is false but Statement II is true
(3) Statement I is true but Statement II is false
(4) Both Statement I and Statement II are true