List of top Chemistry Questions asked in BITSAT

Using the standard electrode potential, find out the pair between which redox reaction is not feasible. \( E^{\ominus} \) values: \( \text{Fe}^{3+}/\text{Fe}^{2+} = +0.77\text{V} \); \( \text{I}_2/\text{I}^- = +0.54\text{V} \); \( \text{Cu}^{2+}/\text{Cu} = +0.34\text{V} \); \( \text{Ag}^+/\text{Ag} = +0.80\text{V} \).
Which of the following is an example of an intensive property?
In a galvanic cell, oxidation always occurs at:
For a first-order reaction \( A \rightarrow B \), the rate constant is \( 0.1 \text{ s}^{-1} \). What is the time required for \( 50\% \) completion?
Which of the following compounds exhibits the highest boiling point due to hydrogen bonding?
The ionic radii in \AA of \( \text{N}^{3-} \), \( \text{O}^{2-} \), and \( \text{F}^- \) are respectively:
Electron affinity is positive, when:
The reaction \( A(g) \rightarrow P(g) + Q(g) + R(g) \) follows first-order kinetics with a half-life of \( 69.3 \) s at \( 500^{\circ}\text{C} \). Starting with pure \( A \) in a container at \( 500^{\circ}\text{C} \) and a pressure of \( 0.4 \) atm, what will be the total pressure of the system after \( 230 \) s?

A current of $2.0\text{ A}$ is passed for 5 hours through an electrolytic cell containing an aqueous solution of a metal salt, depositing $12.0\text{ g}$ of the metal at the cathode. If the atomic mass of the metal is $193\text{ g mol}^{-1}$, find the oxidation state of the metal ion in the solution. (Take Faraday's constant $F = 96500\text{ C mol}^{-1}$).

In an analytical laboratory, a $20.0\text{ mL}$ sample of an aqueous solution containing oxalic acid ($\text{H}_2\text{C}_2\text{O}_4$) requires exactly $16.0\text{ mL}$ of a $0.05\text{ M}$ potassium permanganate ($\text{KMnO}_4$) solution for complete oxidation in a hot, acidic medium ($\text{H}_2\text{SO}_4$). Calculate the molarity of the oxalic acid solution.

An octahedral coordination complex with the electronic configuration $t_{2g}^4 e_g^0$ is expected to exhibit which of the following magnetic properties and d-d transition characteristics?

Using the standard electrode potential, find out the pair between which redox reaction is not feasible. \[ \text{E}^\ominus \text{ values: } \text{Fe}^{3+}/\text{Fe}^{2+} = +0.77\text{ V}; \quad \text{I}_2/\text{I}^- = +0.54\text{ V}; \quad \text{Cu}^{2+}/\text{Cu} = +0.34\text{ V}; \quad \text{Ag}^+/\text{Ag} = +0.80\text{ V} \]

A current of $4.0\text{ A}$ is passed through $0.5\text{ L}$ of $0.2\text{ M NaCl}$ solution for $1200\text{s}$. Calculate the $\text{pH}$ of the solution after electrolysis.

Titration of $0.1467\text{ g}$ of primary standard $\text{Na}_2\text{C}_2\text{O}_4$ required $28.85\text{ mL}$ of $\text{KMnO}_4$ solution. Calculate the molar concentration of $\text{KMnO}_4$ solution.

Balance the following redox reaction in acidic medium and determine the stoichiometric coefficient of $\text{H}_2\text{O}$ in the final balanced equation.

\[\text{MnO}_4^-(aq) + \text{Fe}^{2+}(aq) \rightarrow \text{Mn}^{2+}(aq) + \text{Fe}^{3+}(aq)\]

The de-Broglie wavelength of an electron accelerated from rest through a potential difference of $100\text{ V}$ is approximately:

The stopping potential for photoelectrons emitted from a surface illuminated by light of wavelength $\lambda$ is $\text{V}_s$. If the intensity of the incident light is doubled while keeping wavelength identical, the stopping potential will be:

A decimolar solution of potassium ferrocyanide is \(50\%\) dissociated at \(300\text{K}\). The osmotic pressure of the solution is \((\text{R} = 8.314 \text{ JK}^{-1}\text{mol}^{-1})\)
\(0.1\text{ m}\) of urea and \(0.05\text{ m}\) of \(\text{CaCl}_2\) are dissolved separately in equal volumes of water. Which solution will have higher elevation in boiling point?
The solubility of \(\text{Pb(OH)}_2\) in water is \(6.7 \times 10^{-6}\text{ M}\). Its solubility in a buffer solution of \(\text{pH} = 8\) would be:
If the ionic product of \(\text{Ni(OH)}_2\) is \(1.9 \times 10^{-15}\), then the molar solubility of \(\text{Ni(OH)}_2\) in \(1.0\text{ M NaOH}\) is
A radioactive sample has a half-life of 10 days. The fraction of the initial nuclei decayed after 40 days is:
According to Bohr's model of the hydrogen atom, the ratio of the kinetic energy to the total energy of an electron in \(3^{\text{rd}}\) excited state is?
1.1 mole of A mixed with 2.2 moles of B and the mixture is kept in a 1 L flask and the equilibrium, \(\text{A} + 2\text{B} \rightleftharpoons 2\text{C} + \text{D}\) is reached. If at equilibrium 0.2 mole of C is formed then the value of \(\text{K}_c\) will be
What is \([\text{NH}_4^+]\) in a solution that is \(0.02\text{M } \text{NH}_3\) and \(0.01\text{ M KOH}\)? \([K_b(\text{NH}_3) = 1.8 \times 10^{-5}]\)