Question
Explain the preparation and uses of nylon-2-nylon-6.
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A complex reaction takes place in two steps:
(i) $NO _{( g )}+ O _{3(g)} \rightarrow NO _{3(g)}+ O _{( g )}$
(ii) $NO _{3(g)}+ O _{( g )} \rightarrow NO _{2(g)}+ O _{2(g)}$
The predicted rate law is rate $= k [ NO ]\left[ O _3\right]$. Identify the rate-determining step. Write the overall reaction. Which is the reaction inter-mediate? Why?
→(i) $NO _{( g )}+ O _{3(g)} \rightarrow NO _{3(g)}+ O _{( g )}$
(ii) $NO _{3(g)}+ O _{( g )} \rightarrow NO _{2(g)}+ O _{2(g)}$
The predicted rate law is rate $= k [ NO ]\left[ O _3\right]$. Identify the rate-determining step. Write the overall reaction. Which is the reaction inter-mediate? Why?
What are the types of unit cells?
Write two uses and two properties of polythene.
$300 mmol$ of perfect gas occupies $13 dm ^3$ at $320 K$. Calculate the work done in joules when the gas expands :
(a) Isothermally against a constant external pressure of 0.20 bar,
(b) Isothermal and reversible process,
(c) Into vacuum until the volume of gas is increased by $3 dm ^3$. $\left(R=8.314 J mol ^{-1} K ^{-1}\right)$
→(a) Isothermally against a constant external pressure of 0.20 bar,
(b) Isothermal and reversible process,
(c) Into vacuum until the volume of gas is increased by $3 dm ^3$. $\left(R=8.314 J mol ^{-1} K ^{-1}\right)$
What will be the magnetic moment of transition metal having 3 unpaired electrons?
(a) equal to 1.73 B.M.?
(b) less than 1.73 BM.
(c) more than 1.73 B.M.?
(a) equal to 1.73 B.M.?
(b) less than 1.73 BM.
(c) more than 1.73 B.M.?
Predict the products when
$(1)$ dimethyl acetylene
$(2)$ ethyl acetylene and
$(3)$ diethyl acetylene are treated with mercuric sulphate in dilute sulphuric acid.
→$(1)$ dimethyl acetylene
$(2)$ ethyl acetylene and
$(3)$ diethyl acetylene are treated with mercuric sulphate in dilute sulphuric acid.
Write two applications of electrochemical series.
In a first order reaction, the concentration of reactant decreases from $20 mmol dm ^{-3}$ to $8 mmol dm ^{-3}$ in 38 minutes. What is the half life of reaction? ( 28.7 min )
→Standard enthalpy of combustion of different substances are given. Write thermochemical equation for each.
→| Substance | $\Delta_{ C } H ^0 KJ mol ^{-1}$ |
| $C _{\text {(graphite) }}$ | $-393.5$ |
| $C _6 H _{6(l)}$ | $-3268$ |
| $C _2 H _5 OH _{( l )}$ | $-1409$ |
| $CH _3 CHO$ | $-1166$ |
Enlist the properties of glucose that cannot be explained on the basis of open chain structure of it.