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Write a note on pH scale.
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Alcohols $( R - OH )$, phenols $( Ar - OH )$ and carboxylic acids $( R - COOH )$ can undergo ionization of $O - H$ bond to give away proton $H ^{+}$; yet they have different $pK _{ a }$ values, which are 16,10 and 4.5 respectively. Explain.
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Give the structures and IUPAC names of isomeric phenols represented by the molecular formula $C _8 H _{10} O$.
→Write the structure of the products obtained from the following ketones by action of hydrazine in presence of (1) slightly acidic medium (2) strong base KOH.
Write the name/s of monomer/s, polymer structure and one use of each of the following polymers (trade name) :
From the following data for the decomposition of azoisopropane,
$\left( CH _2\right)_2 CHN = NCH \left( CH _3\right)_2 \rightarrow N _2+ C _6 H _{14}$ estimate the rate of the reaction when total pressure is 0.75 stm .
→$\left( CH _2\right)_2 CHN = NCH \left( CH _3\right)_2 \rightarrow N _2+ C _6 H _{14}$ estimate the rate of the reaction when total pressure is 0.75 stm .
| Time/s | Total pressure/atm |
| 0 | $0.65$ |
| 200 | $1.0$ |
Calculate the enthalpy of the reaction,
$CH _3 COOH _{( g )}+ CH _3 CH _2 OH _{( g )} \rightarrow CH _3 COOCH _2 CH _{3( g )}+ H _2 O _{( g )}$
Bond enthalpies of $O - H , C - O$, in $kJmol ^{-1}$ are 464,351 respectively.
→$CH _3 COOH _{( g )}+ CH _3 CH _2 OH _{( g )} \rightarrow CH _3 COOCH _2 CH _{3( g )}+ H _2 O _{( g )}$
Bond enthalpies of $O - H , C - O$, in $kJmol ^{-1}$ are 464,351 respectively.
How will you represent first-order reactions graphically.
How instantaneous rate of reaction is determined?
Fish generally needs $O_2$ concentration in water at least 3.8 mg/L for survival. What partial pressure of $O_2$ above the water is needed for the survival of fish? Given the solubility of $O_2$ in water at $0 ^\circ\ C$ and $1$ atm partial pressure is $2.2 \times 10^{-3} mol/L$ $(0.054 atm)$
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