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

The first ionization enthalpies of alkali metals decreases down the group because of

In the following reaction, the oxidation number of Cr changes.

\[\ce{ClO^-_{( aq)} + Cr(OH)^-_{4(aq)} -> CrO^{2-}_{4(aq)} + Cl^-_{( aq)} (basic)}\]

Which of the following statements is INCORRECT?

Which of the following is a hydrogen bonded molecular solid?

Identify the strongest oxidising agent.

\[\ce{Na^+ + e^- -> Na}\]; E⁰ = −2.714 V

\[\ce{Pt^{2+} + 2e^- -> Pt}\]; E⁰ = +1.200 V

\[\ce{I2 + 2e^- -> 2I^-}\]; E⁰ = + 0.535 V

\[\ce{Co^{2+} + 2e^- -> Co}\]; ⁰ = −0.280 V

The oxidation number of sulphur in S₈ molecule is ______.

Match the following.

Which of the following is a natural polymer?

The monomers used in the preparation of dextron are ______.

Calcite and ____________ are two forms of calcium carbonate.

If \[\ce{C(s) + O2(g) -> CO2(g), \Delta H = - \text{x}}\]

\[\ce{CO(g) + \frac{1}{2} O2(g) -> CO2(g), \Delta H = - \text{y}}\],

Calculate Δ_f H for CO_(g) formation.

Which among the following compounds is obtained when ethane nitrile is acid hydrolysed?

For the reaction \[\ce{A + 2B -> C}\], the instantaneous rate of reaction at a given instant can be represented by ____________.

Which of the following is CORRECT for the atomic and ionic radii of alkali metals?

In which of the following, oxidation number of oxygen is +2?

Sea water is a homogeneous mixture of ____________ type of solution.

Which of the following molecules have London forces as predominant intermolecular force of attraction?

The following structure can be represented as:

In which of the following, the central atom does NOT have lone pair(s) of electrons?

Which of the following pair represents natural polymers?