Question Bank Directory

$1.00 \text{ g}$ of a non-electrolyte solute (molar mass $250 \text{ g/mol}$) was dissolved in $51.2 \text{ g}$ of benzene. If the freezing point depression constant, $K_f$ of benzene is $5.12 \text{ K kg mol}^{-1}$, the freezing point of benzene will be lowered by:

A compound among the following having a similar structure to graphite is:

Select the element (M) whose trihalides cannot be hydrolysed to form $[M(H_2O)_6]^{3+}$.

The maximum number of water molecules among the following is:

The non-essential amino acid among the following is:

Solution of sucrose (Molar Mass = 342 g mol⁻¹) is prepared by dissolving 34.2 g of it in 1000 g of water. Freezing point of the solution is: (K_f for water is 1.86 K kg mol⁻¹)

The correct statement regarding a solution of two components A and B exhibiting positive deviation from ideal behaviour 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

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:

At $100^\circ\text{C}$ the vapour pressure of a solution of $6.5 \text{ g}$ of a solute in $100 \text{ g}$ water is $732 \text{ mm}$. If $K_b = 0.52$, the boiling point of this solution will be

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?

The incorrect statement among the following is:

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?

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:

The correct order of ionic radii of $Y^{3+}$, $La^{3+}$, $Eu^{3+}$, and $Lu^{3+}$ is: (Atomic nos. Y = 39, La = 57, Eu = 63, Lu = 71)

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:

Which one of the following ions has electronic configuration $[Ar]3d^6$? (At. no: $Mn = 25, Fe = 26, Co = 27, Ni = 28$)

Identify the incorrect statement:

Which one of the following anions is present in chain structure silicates?

$20.0\text{ g}$ of a magnesium carbonate sample decomposes on heating to give carbon dioxide and $8.0\text{ g}$ magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample? (Atomic weight of Mg = 24)