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1. A
   $25$ dyne/cm
2. B
   $100$ dyne/cm
3. C
   $200$ dyne/cm
4. D
   $50$ dyne/cm

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1. A
   $\sqrt{3}$
2. B
   $3$
3. C
   $\frac{1}{\sqrt{3}}$
4. D
   $\frac{1}{3}$

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1. A
   $2.22 \times 10^{-3}$ mol dm$^{-3}$
2. B
   $1.11 \times 10^{-3}$ mol dm$^{-3}$
3. C
   $4.44 \times 10^{-3}$ mol dm$^{-3}$
4. D
   $3.33 \times 10^{-3}$ mol dm$^{-3}$

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1. A
   $\text{NaClO}_3$, NaCl and $\text{H}_2\text{O}$
2. B
   NaCl and HOCl
3. C
   $\text{Na}_2\text{O}$ and NaCl
4. D
   NaOCl and $\text{H}_2\text{O}$

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1. A
   Ca
2. B
   Sr
3. C
   Be
4. D
   Mg

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1. A
   $\text{sp}^3$
2. B
   $\text{dsp}^2$
3. C
   $\text{d}^2\text{sp}^3$
4. D
   $\text{sp}^3\text{d}^2$

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1. A
   $2.74 \times 10^{-4}$ mol dm$^{-3}$
2. B
   $3.94 \times 10^{-4}$ mol dm$^{-3}$
3. C
   $6.85 \times 10^{-4}$ mol dm$^{-3}$
4. D
   $5.48 \times 10^{-4}$ mol dm$^{-3}$

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1. A
   273.15°C
2. B
   −373.15°C
3. C
   0°C
4. D
   −273.15°C

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1. A
   Stephen reaction: SnCl2, HCl
2. B
   Etard reaction: CrO2Cl2
3. C
   Gattermann–Koch formulation: CrO3/CH3CO2O
4. D
   Rosenmund reduction: H2/Pd–BaSO4

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1. A
   (a)
   
2. B
   (b)
   
3. C
   (c)
   
4. D
   (d)
   

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1. A
   (a)
   
2. B
   (b)
   
3. C
   (c)
   
4. D
   (d)
   

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1. A
   HCl
2. B
   HI
3. C
   HBr
4. D
   HF

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1. A
   52.36%
2. B
   68%
3. C
   80%
4. D
   74%

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1. A
   Magnesium
2. B
   Sodium
3. C
   Silver
4. D
   Zinc

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1. A
   Good conductors of heat and electricity
2. B
   All are non-radioactive elements
3. C
   Have greater coordination number than six
4. D
   Strongly paramagnetic

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1. A
   $\text{BCl}_3$
2. B
   $\text{HNO}_3$
3. C
   $\text{NH}_3$
4. D
   $\text{HSO}_4^-$

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

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1. A
   Ammonium salt of higher fatty acids
2. B
   Sodium salt of formic acid
3. C
   Potassium salt of higher fatty acids
4. D
   Ammonium salt of formic acid

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1. A
   1930 second
2. B
   193 second
3. C
   965 second
4. D
   9650 second

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1. A
   Lead storage battery
2. B
   Dry cell
3. C
   Nickel-cadmium cell
4. D
   Mercury cell

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1. A
   Four
2. B
   Two
3. C
   Zero
4. D
   Six

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1. A
   Action of magnesium powder on alkyl halide in aqueous medium
2. B
   Action of magnesium hydroxide on alkyl halide
3. C
   Action of magnesium metal on alkyl halide in presence of dry ether
4. D
   Action of MgCl2 on alkyl halide in presence of dry ether

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1. A
   $14.92$ g cm$^{-3}$
2. B
   $16.00$ g cm$^{-3}$
3. C
   $19.93$ g cm$^{-3}$
4. D
   $18.00$ g cm$^{-3}$

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1. A
   20.2 J
2. B
   −404 J
3. C
   202 J
4. D
   −35.0 J

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1. A
   Urea and Formaldehyde
2. B
   Glycine and $\varepsilon$-amino caproic acid
3. C
   Adipic acid and hexamethylene diamine
4. D
   3-Hydroxybutanoic acid and 3-Hydroxy pentanoic acid

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