List of top Chemistry Questions

\( \text{CH}_3\text{C} \equiv \text{C}\text{CH}_3 \xrightarrow{\text{H}_2/\text{Pt}} A \xrightarrow{\text{D}_2/\text{Pt}} B \)
The compounds \( A \) and \( B \), respectively, are:

At what temperature is the rate of diffusion of SO₂ double that at 50°C?

The percentage hydrolysis of \( 0.15\,\text{M} \) solution of ammonium acetate.
Given: \( K_a \) for \( \text{CH}_3\text{COOH} = 1.8 \times 10^{-5} \) and \( K_b \) for \( \text{NH}_3 = 1.8 \times 10^{-5} \).

Consider the reaction:
\( \text{Cl}_2 (aq) + \text{H}_2\text{S} (aq) \rightarrow \text{S} (s) + 2\text{H}^+ (aq) + 2\text{Cl}^- (aq) \)
The rate equation is \( \text{rate} = k[\text{Cl}_2][\text{H}_2\text{S}] \).
Which of the following mechanisms is/are consistent with this rate equation?

The EMF of the cell
\( \text{Ti} \mid \text{Ti}^+ (0.001\,\text{M}) \; \| \; \text{Cu}^{2+} (0.01\,\text{M}) \mid \text{Cu} \)
is \( 0.83\,\text{V} \).
The cell EMF can be increased by:

The equilibrium constant for the disproportionation reaction
\( 2\text{Cu}^+ (aq) \rightleftharpoons \text{Cu} (s) + \text{Cu}^{2+} (aq) \)
at \( 25^\circ \text{C} \) is given that
\( E^\circ_{\text{Cu}^+/\text{Cu}} = 0.52\,\text{V}, \quad E^\circ_{\text{Cu}^{2+}/\text{Cu}^+} = 0.16\,\text{V} \).

The non-stoichiometric compound \( \mathrm{Fe}_{0.94}\mathrm{O} \) is formed when \( x\% \) of \( \mathrm{Fe}^{2+} \) ions are replaced by as many \( \dfrac{2}{3} \mathrm{Fe}^{3+} \) ions.
The value of \( x \) is:

Figure below shows two paths that may be taken by a gas to go from a state A to a state C. In process AB, 400J of heat is added to the system and in process BC, 100J of heat is added to the system. The heat absorbed by the system in the process AC will be:

Phenol + acetone xrightarrowH⁺ X The product X is:

Give the possible structure of X in the following reaction: C₆H₆ + D₂SO₄ [D₂O] X

In the reaction P+Q→ 2R+S, the time taken for 75% reaction of P is twice the time taken for 50% reaction of P. The concentration of Q varies with time as shown. The overall order of the reaction is: