HSC Science कक्षा ११ - Tamil Nadu Board of Secondary Education Question Bank Solutions

Choose the disproportionation reaction among the following redox reactions.

Total number of electrons present in 1.7 g of ammonia is

The correct increasing order of the oxidation state of sulphur in the anions \[\ce{SO^2-_4, SO^2-_3, S2O^2-_4, S2O^2-_6}\] is

Which of the following contains the same number of carbon atoms as in 6 g of carbon-12.

What do you understand by the term oxidation number?

Distinguish between oxidation and reduction.

Hydrogen peroxide is an oxidising agent. It oxidises ferrous ion to ferric ion and reduced itself to water. Write a balanced equation.

Balance the following equation by the oxidation number method.

\[\ce{K2Cr2O7 + Kl + H2SO4 -> K2SO4 + Cr2(SO4)3 + I2 + H2O}\]

Balance the following equation by the oxidation number method.

\[\ce{KMnO4 + Na2SO3 -> MnO2 + Na2SO4 + KOH}\]

Balance the following equation by the oxidation number method.

\[\ce{Cu + HNO3 -> Cu(NO3)2 + NO2 + H2O}\]

Balance the following equation by the oxidation number method.

\[\ce{KMnO4 + H2C2O4 + H2SO4 -> K2SO4 + MnSO4 + CO2 + H2O}\]

Balance the following equation by the ion electron method.

\[\ce{KMnO4 + SnCl2 + HCl -> MnCl2 + SnCl4 + H2O + KCl}\]

Balance the following equation by the ion electron method.

\[\ce{C2O^2-_4 + Cr2O^2-_7 -> Cr^3+ + CO2}\] (in acid medium)

Balance the following equation by the ion electron method.

\[\ce{Na2S2O3 + I2 -> Na2S4O6 + NaI}\]

Balance the following equation by the ion electron method.

\[\ce{Zn + NO^-_3 ->Zn^2+ + NO}\] (in acid medium)

Ionic hydrides are formed by ________.

Non-stoichiometric hydrides are formed by __________.

The hybridisation of oxygen atom is H₂O and H₂O₂ are, respectively

Discuss the three types of Covalent hydrides.

Predict which of the following hydrides is a gas on a solid

1. HCl
2. NaH

Give your reason.