HSC Science कक्षा १२ - Tamil Nadu Board of Secondary Education Question Bank Solutions

Explain the following term with a suitable example.

Slag

Give the uses of sulphuric acid.

Give a reason to support that sulphuric acid is a dehydrating agent.

Complete the following reaction.

\[\ce{Cu + \underset{\text{(Hot conc)}}{H2SO4} ->}\]

Complete the following reaction.

\[\ce{Sb + Cl2 ->}\]

Which one of the following ions has the same number of unpaired electrons as present in V³⁺?

The magnetic moment of Mn²⁺ ion is ____________.

The catalytic behaviour of transition metals and their compounds is ascribed mainly due to ____________.

The correct order of increasing oxidizing power in the series

What are transition metals? Give four examples.

Complete the following.

\[\ce{MnO^2-_4 + H^+ ->?}\]

What are interstitial compounds?

Calculate the number of unpaired electrons in Ti³⁺, Mn²⁺ and calculate the spin only magnetic moment.

Explain briefly how +2 states become more and more stable in the first half of the first-row transition elements with increasing atomic numbers.

Explain the variation in `"E"_ ("M"^(3+)//"M"^(2+))^0` 3d series.

Compare the ionization enthalpies of the first series of the transition elements.

The `"E"_("M"^(2+)//"M")^0` value for copper is positive. Suggest a possible reason for this.

Describe the variable oxidation state of 3d series elements.

Which metal in the 3d series exhibits +1 oxidation state most frequently and why?

Why first ionization enthalpy of chromium is lower than that of zinc?