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

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.

Write the expected formulas for the hydrides of 4th-period elements. What is the trend in the formulas? In what way the first two members of the series different from the others?

NH₃ has an exceptionally high melting point and boiling point as compared to those of the hydrides of the remaining element of group 15 - Explain.

Why interstitial hydrides have a lower density than the parent metal?

How do you expect the metallic hydrides to be useful for hydrogen storage?

The molality of a solution containing 1.8 g of glucose dissolved in 250 g of water is

Which of the following concentration terms is/are independent of temperature