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The reason for a greater range of oxidation states in actinoids is attributed to:

The freezing point depression constant for water is $1.86^\circ\text{C m}^{-1}$. If $5.00 \text{ g Na}_2\text{SO}_4$ is dissolved in $45.0 \text{ g H}_2\text{O}$, the freezing point is changed by $-3.82^\circ\text{C}$. Calculate the van't Hoff factor for $\text{Na}_2\text{SO}_4$.

Choose the correct statement:

The molecular formula of a commercial resin used for exchanging ions in water softening is $C_8H_7SO_3Na$ (Mol. Wt. 206). The maximum uptake of $Ca^{2+}$ ions by the resin when expressed in mole per gram resin is based on the reaction: $$ 2C_8H_7SO_3Na + Ca^{2+} \rightarrow (C_8H_7SO_3)_2Ca + 2Na^+ $$

The freezing point depression constant for water is $1.86 ^\circ\text{C m}^{-1}$. If $5.00 \text{ g}$ $Na_2SO_4$ is dissolved in $45.0 \text{ g}$ $H_2O$, the freezing point is changed by $-3.82 ^\circ\text{C}$. The Van’t Hoff factor for $Na_2SO_4$ is:

The mixture that shows positive deviation from Raoult's law is:

Find out the major product X in the reaction given: $FeCr_2O_4 + Na_2CO_3 + O_2 \rightarrow X + Fe_2O_3 + CO_2$

A set of ions among the following that have a $3d^2$ electronic configuration is:

$1.00 \text{ g}$ 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?

Use of an artificial kidney during hemodialysis may result in : (a) Nitrogenous waste build-up in the body (b) Non-elimination of excess potassium ions (c) Reduced absorption of calcium ions from gastro-intestinal tract (d) Reduced RBC production. Which of the following options is the most appropriate?