Question
How much water is produced from complete combustion of 30 gm propyne.
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6.72dm3 of an unknown gas at STP requires 113.35J of heat to raise its temperature by 15°C at constant volume. Calculate CV, Cp, and atomicity of the gas.
$\text{X(g)}+3\text{Y(g)}\rightleftharpoons2\text{Z(g)};$ $\Delta\text{H}=-40\text{kJ}$ and so of X, Y and Z are 60, 40 and 50kJ-1 mol-1 respectively. Calculate the temperature above or below which reaction become feasible?
→Correct the following electronic configuration of the elements in the ground state.
→- $1\text{s}^2\ 2\text{s}^1,2\text{p}^2_\text{x},2\text{p}^2_\text{y},2\text{p}^2_\text{z},3\text{s}62,2\text{p}^1_\text{x}$
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The solubility of Sr(OH)2 at 298K is 19.23g/L of solution. Calculate the concentrations of strontium and hydroxyl ions and the pH of the solution.
For the following bond cleavages, use curved-arrows to show the electron flow and classify each as homolysis or heterolysis. Identify reactive intermediate produced as free radical, carbocation and carbanion.
Give the appropriate reason.
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- It is necessary to define the 'standard state'.
- It is necessary to specify the phases of the reactants and products in a thermochemical equation.
What happens when :
(i) ethylene dibromide is heated with zinc.
(ii) solution of sodium succinate is electrolysed.
(iii) ethylene dichloride is heated with zinc.
(i) ethylene dibromide is heated with zinc.
(ii) solution of sodium succinate is electrolysed.
(iii) ethylene dichloride is heated with zinc.
Arrange the following according to bond length and bond dissociation energy giving reasons:
→- $\text{H}-\text{F},\text{H}-\text{Cl},\text{H}-\text{Br},\text{H}-\text{I}$
- $\text{C}-\text{C},\text{C}=\text{C},\text{C}\equiv\text{C}$
- $\text{C}-\text{H}$ bond lenth in CH4, C2H4 and C2H2
Explain the structure of the $CO _2$ molecule.
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