MAH-MHT CET (PCM/PCB) entrance exam Question Bank Solutions

The solubility product (K_sp) of solid barium sulphate at 298 K is 1.1 × 10^-10. The molar solubility, S of \[\ce{Ba^{2+} and [SO^{2-}_4]}\] are ______.

Mole is the SI unit of ____________.

Isothermally and reversibly one mole of neon expands from 2 m³ to 20 m³ and produces 831.4 J of work. The temperature at which expansion takes place is ____________.
(R = 8.314 J K^-1 mol^-1)

Which of the following element belongs to the actinoid series?

Equilibrium constant for a reaction is 20. What is the value of ΔG° at 300 K? (R = 8 x 10^-3 kJ)

One mole of NaCl_(s) on melting absorbed 30.5 kJ of heat and its entropy increased by 28.8 J K⁻¹. The melting point of NaCl is ____________.

A system is changed from an initial state to a final state by a manner such that ∆H = Q. If the change from initial state to final state was made by a different path, then ____________.

Identify the INCORRECT statement.

Which of the following statements are FALSE about lanthanoids?

(I) They have lower heat of atomization than transition metals

(II) They are soft metals with silvery white colour and densities of about 7 g cm⁻³.

(III) They react with water to give the metal hydroxide and oxygen gas.

(IV) They form hydroxides, which are covalent and basic.

An ideal gas expands isothermally and reversibly from 10 m³ to 20 m³ at 300 K, performing 5.187 kJ of work on surrounding, calculate number of moles of gas used.

Which of the following is CORRECT about alkynes?

The electronic configuration of transition element 'X' in +3 oxidation state is [Ar] 3d⁴. What is its atomic number?

For a process, entropy change of a system is expressed as ________.

If K_sp of a sparingly soluble salt M₂X at 25°C is 1.0 × 10⁻¹¹, the solubility of the salt in mole litre⁻¹ at this temperature will be ____________.

For a reversible spontaneous change, ∆S is ____________.

Which one of the following is an organometallic compound?

Arrange the following in order of increasing entropy.

I. 1.0 mol H₂O (298 K, 1 atm)

II. 1.0 mol H₂O (270 K, 1 atm)

III. 1.0 mol H₂O (400 K, 1 atm)

The volume in dm³ occupied by 15.0 g of ethane at STP is ____________.

Which statement(s) is/are CORRECT about applications of lanthanoid metals/ions and their compounds?

(I) The optoelectronics applications use lanthanoid ions as active ions in luminescent materials.

(II) Lanthanoid compounds are used in television tubes.

(III) Lanthanoids are used in hybrid cars, superconductors and permanent magnets.

The volume of 1 mole of any pure gas at standard temperature and pressure is always equal to ______.