Browse and search thousands of solved questions for your preparation.
Free questions with full explanations — locked behind signup to protect quality.
The correct statement regarding a solution of two components A and B exhibiting positive deviation from ideal behaviour is:
Actinoids exhibit more number of oxidation states than lanthanoids. It is because of:
Which one of the following ions is the most stable in an aqueous solution? (At. No. Ti = 22, V = 23, Cr = 24, Mn = 25)
Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states?
A solution contains a non-volatile solute of molecular mass $M_2$. Which of the following expressions gives the molecular mass of solute in terms of osmotic pressure, where $m_2$ is the mass of solute, $V$ is the volume of solution, and $\pi$ is osmotic pressure?
Normality of a solution containing $9.8 \text{ g}$ of $\text{H}_2\text{SO}_4$ in $250 \text{ cm}^3$ of the solution is
Considering the following reaction, $$3 MnO_4^{2-} + 2 H_2O \rightleftharpoons 2 MnO_4^{-} + MnO_2 + 4 OH^{-}$$ The reagent that facilitates the removal of $OH^{-}$ ions to ensure the completion of the conversion of $K_2MnO_4$ to $KMnO_4$ is:
The calculated spin only magnetic moment of $Cr^{2+}$ ion is:
Match the equilibrium processes in List-I with their respective physical properties in List-II and choose the correct option: **List-I (Equilibrium Process)** A. $\text{Liquid} \rightleftharpoons \text{Vapour}$ B. $\text{Solid} \rightleftharpoons \text{Liquid}$ C. $\text{Solid} \rightleftharpoons \text{Vapour}$ D. $\text{Solute (solid)} \rightleftharpoons \text{Solute (solution)}$ **List-II (Physical Properties)** I. Melting point II. Boiling point III. Sublimation point IV. Saturated solution V. Unsaturated solution
In which of the following pairs are both the ions coloured in aqueous solution? (At. no : $\text{Sc} = 21$, $\text{Ti} = 22$, $\text{Ni} = 28$, $\text{Cu} = 29$, $\text{Co} = 27$)
More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is:
A pair among the following have nearly the same atomic radii: (Numbers in the parenthesis are atomic numbers).
$0.5$ molal aqueous solution of a weak acid ($\text{HX}$) is $20\%$ ionised. If $K_f$ for water is $1.86 \text{ K kg mol}^{-1}$, the lowering in freezing point of the solution is:
Which one of the following ions has electronic configuration $[Ar]3d^6$? (At. no: $Mn = 25, Fe = 26, Co = 27, Ni = 28$)
The major product of the following reaction is: [Image of Phthalic acid reacting with NH3 under strong heating]
Match the statements given in List-I with the corresponding element given in List-II: **List-I (Characteristics)** (a) Element that exhibits +3 oxidation state only. (b) An element that exhibits a greater number of oxidation states. (c) Element which is a reducing agent in its +2 oxidation state. (d) An element that is not considered as a transition element. **List-II (Elements)** (i) Mn (ii) Zn (iii) Sc (iv) Cr Choose the correct answer from the options given below:
Match the catalyst with the process: | Catalyst | Process | | :--- | :--- | | (i) $V_2O_5$ | (a) The oxidation of ethylene to ethanal | | (ii) $TiCl_4 + Al(CH_3)_3$ | (b) Polymerisation of alkynes | | (iii) $PdCl_2$ | (c) Oxidation of $SO_2$ in the manufacture of $H_2SO_4$ | | (iv) Nickel complexes | (d) Polymerisation of ethylene | Which of the following is the correct matching of Catalyst & Process?
Identify the pair of Lanthanoides with one strong oxidant and one strong reductant:
Given below are two statements: Statement I: $Cr^{2+}$ is oxidising agent and $Mn^{3+}$ is a reducing agent in nature. Statement II: $Sc^{3+}$ compounds are repelled by the applied magnetic field. In light of the above statements, choose the most appropriate answer from the options given below:
Aluminium chloride in acidified aqueous solution forms a complex 'A'. The formula of A and hybridisation state of Al in 'A' is respectively: