HSC Science (General) १२ वीं कक्षा - Maharashtra State Board Question Bank Solutions

Observe the following compounds and answer the questions given below.

      (I)

\[\ce{\underset{\text{(II)}}{CH3 - CH2 - Br}}\]

1. Identify the type of halides.
2. Explain the nature of the C – Br bond in both of these halides.
3. Which of these compounds will undergo aqueous alkaline hydrolysis readily? Write the reaction in support of your answer.

Explain the osmotic pressure of a solution with the help of a thistle tube.

Explain the phenomenon of osmosis.

Define Osmosis.

What is substituted imine called?

Write the potential produced through the NICAD storage cell.

Mercury battery provides more constant voltage than any other dry cell: Explain.

Explain aldol condensation reaction in detail.

Why is Nickel-cadmium cell referred to as a secondary cell?

Write working of NICAD storage cell. Also write its applications.

Effect of catalyst in a chemical reaction is to change the _______.

Sulfur dioxide reacts with sodium hydroxide solution to form _______.

The number of lone pairs of electrons present in ClF₅:

Draw structure and name the shape of bromine trifluoride.

Explain the trend in the following atomic properties of group 16 elements:

Electron gain enthalpy

The standard enthalpy of formation of water is - 286 kJ mol^-1. Calculate the enthalpy change for the formation of 0.018 kg of water.

Calculate enthalpy of formation of HCl if bond enthalpies of H₂, Cl₂ and HCl are 434 kJ mol^-1, 242 kJ mol^–1 and 431 kJ mol^–1 respectively.

Define the Standard enthalpy of combustion.

State and explain Hess’s law of constant heat summation.

The enthalpy change of the following reaction:

\[\ce{CH_{4(g)} + Cl_{2(g)} -> CH3Cl_{(g)} + HCl_{(g)}ΔH^0 = –104 kJ}\]

Calculate C – Cl bond enthalpy. The bond enthalpies are: