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

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

Which among the following is used in the treatment of cancer?

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

For a reversible spontaneous change, ∆S is ____________.

Which one of the following is an organometallic compound?

Which one of the following orders is CORRECT in case of energy of the given subshells?

P: n = 4; l = 3

Q: n = 5; I = 1

R: n = 5; l = 0

S: n = 4; l = 2

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)

How many electrons in ₁₉K have n = 3, l = 1?

The hybridization of the central atom in BF₃, CH₄, NH₃ and BeCl₂ are ____________ respectively.

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.

Which of the following alcohol contains −OH group attached to a sp² hybridised carbon atom?

The reaction in which 2 molecules of chlorobenzene reacts with metallic sodium in presence of dry ether forming diphenyl is an example of ______.

How many gram of sodium (atomic mass 23 u) is required to prepare one mole of ethane from methyl chloride by Wurtz reaction?

Haloarenes are less reactive than alkyl halides towards nucleophilic substitution because ____________ in aryl halide.

The three electrons have the following set of quantum numbers:

X = 6, 1, −1, `+1/2`

Y = 6, 0, 0, `+1/2`

Z = 5, 1, 0, `+1/2`

Identify the CORRECT statement.

What is the entropy change (in J K⁻¹ mol⁻¹) when one mole of ice is converted into water at 0°C? (The enthalpy change for the conversion of ice to liquid water is 6.0 kJ mol⁻¹ at 0°C)

In how many of the following, ∆S is positive?

i. Melting of ice

ii. Sublimation of iodine

iii. Dissolution of CuSO₄ in water

iv. Condensation of water vapour

v. Dissociation of H₂ molecule into atoms

vi. Conversion of carbon dioxide gas to dry ice

vii. Vaporization of acetone

The only radioactive element among the lanthanoids is ____________.

How many electrons can fit in the orbital for which n = 4 and l = 2?

In which of the following, ∆S is positive?