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1. A
   Polynucleotide strands wind into a right-handed double helix.
2. B
   Sugar-phosphate backbone lies at inside and bases lie outside of helix.
3. C
   Double helix is stabilized by hydrogen bonding formed in two strands.
4. D
   A=T and G=C are complementary base pairs.

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1. A
   It is sum of power of concentration terms in rate law equation.
2. B
   It may be integer, fraction or zero.
3. C
   It is theoretical quantity
4. D
   It is experimentally determined quantity.

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1. A
   $1.6\times10^{-3}$
2. B
   $2.5\times10^{-3}$
3. C
   $4.0\times10^{-3}$
4. D
   $8.0\times10^{-3}$

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1. A
   $R_2C=CR_2$
2. B
   $R_2C=CHR$
3. C
   $R_2C=CH_2$
4. D
   $RCH=CH_2$

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1. A
   Vacancy defect
2. B
   Self interstitial defect
3. C
   Schottky defect
4. D
   Frenkel defect

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1. A
   Quinol
2. B
   Catechol
3. C
   Propylene glycerol
4. D
   Resorcinol

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1. A
   NaCl
2. B
   $\text{NH}_4\text{HCO}_3$
3. C
   $\text{NH}_3$
4. D
   $\text{CO}_2$

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1. A
   Trigonal pyramidal
2. B
   Square pyramidal
3. C
   Square planar
4. D
   Distorted octahedral

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1. A
   5' end of polynucleotide has free phosphate group.
2. B
   Nucleic acids contain backbone formed of –C–O–C– linkage.
3. C
   Polynucleotide has free –OH group at 3' end.
4. D
   Neighbouring nucleotides are bonded through phosphate diester linkage.

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1. A
   $\Omega^{-1}$
2. B
   $\text{A V}^{-1}$
3. C
   $\text{C V}^{-1}\text{s}^{-1}$
4. D
   $\Omega$

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1. A
   $-2$
2. B
   $-3$
3. C
   $+3$
4. D
   $+4$

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1. A
   Coordinate
2. B
   Solvate
3. C
   Ionization
4. D
   Linkage

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1. A
   $-\text{NHR}$
2. B
   $-\text{CN}$
3. C
   $-\text{NO}_2$
4. D
   $-\text{COOR}$

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1. A
   $R\text{-NH}_2$
2. B
   $R\text{-CONH}_2$
3. C
   $R\text{-CHO}$
4. D
   $R\text{-COOH}$

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1. A
   52.90 pm
2. B
   78.90 pm
3. C
   26.45 pm
4. D
   13.35 pm

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1. A
   $\text{Na}_3[\text{Co(NO}_2)_6]$
2. B
   $[\text{Fe(H}_2\text{O)}_5\text{(NCS)}]^{2+}$
3. C
   $[\text{Cu(NH}_3)_4]^{2+}$
4. D
   $[\text{Co(C}_2\text{O}_4)_3]^{3-}$

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1. A
   $2.16\times10^{-2}\,\text{min}^{-1}$
2. B
   $3.52\times10^{-2}\,\text{min}^{-1}$
3. C
   $4.81\times10^{-2}\,\text{min}^{-1}$
4. D
   $7.67\times10^{-2}\,\text{min}^{-1}$

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1. A
   $\text{NH}_3 > R\text{-NH}_2 > R_2\text{NH}$
2. B
   $R_2\text{NH} > R\text{-NH}_2 > \text{NH}_3$
3. C
   $R\text{-NH}_2 > R_2\text{NH} > \text{NH}_3$
4. D
   $R_2\text{NH} > \text{NH}_3 > R\text{-NH}_2$

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1. A
   Scanning electron microscope
2. B
   X-ray diffractometer
3. C
   Transmission electron microscope
4. D
   UV-visible spectrophotometer

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1. A
   $\text{CaO(s)}+\text{CO}_2\text{(g)}\longrightarrow\text{CaCO}_3\text{(s)}$
2. B
   $\text{NaCl(aq)}\longrightarrow\text{NaCl(s)}$
3. C
   $\text{NaNO}_3\text{(s)}\longrightarrow\text{Na}^+\text{(aq)}+\text{NO}_3^-\text{(aq)}$
4. D
   $\text{N}_2\text{(g)}+3\text{H}_2\text{(g)}\longrightarrow 2\text{NH}_3\text{(g)}$

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1. A
   It increases with increase in temperature.
2. B
   It decreases with increase in temperature.
3. C
   Remain constant on changing temperature.
4. D
   It is not a state function.

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1. A
   $15.0\,\text{g mol}^{-1}$
2. B
   $30.0\,\text{g mol}^{-1}$
3. C
   $7.5\,\text{g mol}^{-1}$
4. D
   $40.0\,\text{g mol}^{-1}$

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1. A
   $3^\circ > 2^\circ > 1^\circ$
2. B
   $2^\circ > 1^\circ > 3^\circ$
3. C
   $3^\circ > 1^\circ > 2^\circ$
4. D
   $1^\circ > 2^\circ > 3^\circ$

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1. A
   $\text{C}_6\text{H}_5\text{COOH}$
2. B
   $\text{C}_6\text{H}_5\text{CHO}$
3. C
   $\text{C}_6\text{H}_5\text{CHCl}_2$
4. D
   $\text{C}_6\text{H}_5\text{Cl}$

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1. A
   $\text{N}_2$
2. B
   $\text{H}_2$
3. C
   $\text{O}_2$
4. D
   $\text{F}_2$

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