Question
Name and draw the structure of the repeating unit in natural rubber.
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Answer
Repeating unit of natural rubber (Basic unit : isoprene)Need a full question paper?
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What happens when
a. $Cl_2$ reacts with $F_2$ in equal volume at $437\ K$.
b. $Br_2$ reacts with excess of $F_2$.
→a. $Cl_2$ reacts with $F_2$ in equal volume at $437\ K$.
b. $Br_2$ reacts with excess of $F_2$.
The solubility of o-nitrophenol and p-nitrophenol is $0.2\ g$ and $1.7\ g/100\ g$ of $H_2O$ respectively. Explain the difference.
→Consider the reaction $2 A +2 B \rightarrow 2 C + D$.
From the following data, calculate the order and rate constant of the reaction.
Write the rate law of the reaction.
→From the following data, calculate the order and rate constant of the reaction.
| $[ A ]_0 / M$ | $[ B ]_0 / M$ | $r _0 / Ms ^{-1}$ |
| $0.488$ | $0.160$ | $0.24$ |
| $0.244$ | $0.160$ | $0.06$ |
| $0.244$ | $0.320$ | $0.12$ |
Write the rate law of the reaction.
Match the following pairs :
Name of polymer – Monomer
1. Teflon – a. $CH_2= CH_2$
2. PVC – b. $CF_2 = CF_2$
3. Polyester – c.$ CH_2= CHCl$
4. Polythene – $d. C_6H_5OH$ and $HCHO$
5. Bakelite – e. Dicarboxylic acid and polyhydoxyglycol
→Name of polymer – Monomer
1. Teflon – a. $CH_2= CH_2$
2. PVC – b. $CF_2 = CF_2$
3. Polyester – c.$ CH_2= CHCl$
4. Polythene – $d. C_6H_5OH$ and $HCHO$
5. Bakelite – e. Dicarboxylic acid and polyhydoxyglycol
Explain the trend in the following properties of group $17$ elements.(1) Atomic size,
(2) Ionisation enthalpy,
(3) Electronegativity,
(4) Electron gain enthalpy.
→(2) Ionisation enthalpy,
(3) Electronegativity,
(4) Electron gain enthalpy.
Write balanced equations for the half reactions and calculate the reduction potentials at $25^{\circ} C$ for the following half cells :
$(a) \ Cl ^{-}(1.2 M ) \mid Cl _2( g , 3.6 atm ) E ^0=1.36 V$
$(b) \ Fe ^{2+}(2 M ) \mid Fe _{( s )} E ^0=-0.44 V$
→$(a) \ Cl ^{-}(1.2 M ) \mid Cl _2( g , 3.6 atm ) E ^0=1.36 V$
$(b) \ Fe ^{2+}(2 M ) \mid Fe _{( s )} E ^0=-0.44 V$
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(Atomic mass of element = 60)
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