1. A
   Structure (1)
2. B
   Structure (2)
3. C
   Structure (3)
4. D
   Structure (4)

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1. A
   Both (A) and (R) are correct and (R) is the correct explanation of (A).
2. B
   Both (A) and (R) are correct but (R) is not the correct explanation of (A).
3. C
   (A) is correct but (R) is not correct
4. D
   (A) is not correct but (R) is correct

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1. A
   Structure (1)
2. B
   Structure (2)
3. C
   Structure (3)
4. D
   Structure (4)

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1. A
   ununennium
2. B
   unnilennium
3. C
   unununnium
4. D
   ununoctium

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1. A
   (a) - (iii), (b) – (ii), (c) – (iv), (d) – (i)
2. B
   (a) - (iii), (b) – (iv), (c) – (ii), (d) – (i)
3. C
   (a) - (i), (b) – (iv), (c) – (ii), (d) – (iii)
4. D
   (a) - (iv), (b) – (iii), (c) – (i), (d) – (ii)

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1. A
   (a) – (iv), (b) – (i), (c) – (ii), (d) – (iii)
2. B
   (a) – (iii), (b) – (i), (c) – (ii), (d) – (iv)
3. C
   (a) – (i), (b) – (ii), (c) – (iv), (d) – (iii)
4. D
   (a) – (ii), (b) – (iii), (c) – (iv), (d) – (i)

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1. A
   Enzymes are biocatalysts.
2. B
   Like chemical catalysts enzymes reduce the activation energy of bio processes.
3. C
   Enzymes are polysaccharides.
4. D
   Enzymes are very specific for a particular reaction and substrate.

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1. A
   dicyanidosilver(II) diaquaargentate(II)
2. B
   diaquasilver(II) dicyanidoargentate(II)
3. C
   dicyanidosilver(I) diaquaargentate(I)
4. D
   diaquasilver(I) dicyanidoargentate(I)

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1. A
   small size
2. B
   high exchange enthalpy
3. C
   high electronegativity
4. D
   high basic character

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1. A
   $ClF_3$
2. B
   $IF_5$
3. C
   $SF_4$
4. D
   $XeF_2$

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1. A
   There are two 3-centre-2-electron bonds.
2. B
   The four terminal B-H bonds are two centre two electron bonds.
3. C
   The four terminal Hydrogen atoms and the two Boron atoms lie in one plane.
4. D
   Both the Boron atoms are $sp^2$ hybridised.

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1. A
   Both Statement I and Statement II are correct
2. B
   Both Statement I and Statement II are incorrect
3. C
   Statement I is correct but Statement II is incorrect
4. D
   Statement I is incorrect but Statement II is correct

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1. A
   Both (A) and (R) are correct and (R) is the correct explanation of (A)
2. B
   Both (A) and (R) are correct but (R) is not the correct explanation of (A)
3. C
   (A) is correct but (R) is not correct
4. D
   (A) is not correct but (R) is correct

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1. A
   Both Statement I and Statement II are correct
2. B
   Both Statement I and Statement II are incorrect
3. C
   Statement I is correct but Statement II is incorrect
4. D
   Statement I is incorrect but Statement II is correct

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1. A
   zero order (y = concentration and x = time), first order (y = $t_{1/2}$ and x = concentration)
2. B
   zero order (y = concentration and x = time), first order (y = rate constant and x = concentration)
3. C
   zero order (y = rate and x = concentration), first order (y = $t_{1/2}$ and x = concentration)
4. D
   zero order (y = rate and x = concentration), first order (y = rate and x = $t_{1/2}$)

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1. A
   $S_N1$ reaction yields 1 : 1 mixture of both enantiomers
2. B
   The product obtained by $S_N2$ reaction of haloalkane having chirality at the reactive site shows inversion of configuration
3. C
   Enantiomers are superimposable mirror images on each other
4. D
   A racemic mixture shows zero optical rotation

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1. A
   Benzene, $Cl_2$, anhydrous $FeCl_3$
2. B
   Phenol, $NaNO_2$, HCl, CuCl
3. C
   Benzene (structure), HCl
4. D
   Aniline (structure with $NH_2$), HCl, Heating

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1. A
   All the five 5d orbitals are different in size when compared to the respective 4d orbitals.
2. B
   All the five 4d orbitals have shapes similar to the respective 3d orbitals.
3. C
   In an atom, all the five 3d orbitals are equal in energy in free state.
4. D
   The shapes of $d_{xy}, d_{yz}$ and $d_{zx}$ orbitals are similar to each other; and $d_{x^2-y^2}$ and $d_{z^2}$ are similar to each other.

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1. A
   Structure (1)
2. B
   Structure (2)
3. C
   Structure (3)
4. D
   Structure (4)

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1. A
   Diamond and graphite have two dimensional network.
2. B
   Diamond is covalent and graphite is ionic.
3. C
   Diamond is $sp^3$ hybridised and graphite is $sp^2$ hybridized.
4. D
   Both diamond and graphite are used as dry lubricants.

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1. A
   Alkali metals react with water to form their hydroxides.
2. B
   The oxidation number of K in $KO_2$ is +4.
3. C
   Ionisation enthalpy of alkali metals decreases from top to bottom in the group.
4. D
   Lithium is the strongest reducing agent among the alkali metals.

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1. A
   $p = p_1 + p_2 + p_3$
2. B
   $p = n_1\frac{RT}{V} + n_2\frac{RT}{V} + n_3\frac{RT}{V}$
3. C
   $p_i = \chi_i p$, where $p_i$ = partial pressure of $i^{th}$ gas, $\chi_i$ = mole fraction of $i^{th}$ gas in gaseous mixture
4. D
   $p_i = \chi_i p_i^\circ$, where $\chi_i$ = mole fraction of $i^{th}$ gas in gaseous mixture, $p_i^\circ$ = pressure of $i^{th}$ gas in pure state

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1. A
   Both Statement I and Statement II are correct.
2. B
   Both Statement I and Statement II are incorrect.
3. C
   Statement I is correct but Statement II is incorrect.
4. D
   Statement I is incorrect but Statement II is correct.

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1. A
   $CuSO_4(aq) + Zn(s) \rightarrow ZnSO_4(aq) + Cu(s)$
2. B
   $CuSO_4(aq) + Fe(s) \rightarrow FeSO_4(aq) + Cu(s)$
3. C
   $FeSO_4(aq) + Zn(s) \rightarrow ZnSO_4(aq) + Fe(s)$
4. D
   $2CuSO_4(aq) + 2Ag(s) \rightarrow 2Cu(s) + Ag_2SO_4(aq)$

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1. A
   Both Statement I and Statement II are correct.
2. B
   Both Statement I and Statement II are incorrect.
3. C
   Statement I is correct but Statement II is incorrect.
4. D
   Statement I is incorrect but Statement II is correct.

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