Science (English Medium) Class 12 - CBSE Question Bank Solutions for Chemistry

Solve the following question.
A steady current of 2 amperes was passed through two electrolytic cells X and Y connected in series containing electrolytes FeSO₄ and ZnSO₄ until 2.8 g of Fe deposited at the cathode of cell X. How long did the current flow? Calculate the mass of Zn deposited at the cathode of cell Y.
(Molar mass : Fe = 56 g mol^–1, Zn = 65.3 g mol^–1, 1F = 96500 C mol^–1)

Which one of the following is incorrect for an ideal solution?

Packing efficiency for simple cubic structure is ____________.

For ideal solution the enthalpy of mixing of the pure components to form the solution is ____________.

For ideal solution the volume of mixing of the pure components to form the solution is ____________.

The rate at which a solid dissolves in liquid does not depend on ____________.

Electrolytic cell uses electrical energy to bring about ____________.

According to Faraday’s First Law of Electrolysis, the amount of chemical reaction which occurs at any electrode during electrolysis by a current is proportional to the ____________.

Which metal is also found in sea beds?

Hinsberg’s reagent reacts with primary and secondary amines to form sulphonamides. This reagent is also known as:

p-toluenesulphonyl chloride does not react with ____________.

p-toluenesulphonyl chloride is used to:

Which of the following condition is not satisfied by an ideal solution?

Which relationship is not correct?

The boiling points of hydrides of group 16 are in the order:

The formation of \[\ce{O^+_2[PtF6]^-}\] is the basis for the formation of first xenon compound. This is because ____________.

Which of the following statement is incorrect?

Match the items of Columns I and II and mark the correct option.

Assertion: Presence of a nitro group at ortho or para position increases the reactivity of haloarenes towards nucleophilic substitution.

Reason: Nitro group, being an electron-withdrawing group decreases the electron density over the benzene ring.

Which of the following is an example of a solid solution?