Science (English Medium) Class 11 - CBSE Question Bank Solutions for Chemistry

Depict the galvanic cell in which the reaction takes place.

\[\ce{Zn_{(s)} + 2Ag+_{ (aq)} -> Zn^{2+}_{ (aq)} + 2Ag_{(s)}}\]

Further show:

1. Which of the electrode is negatively charged?
2. The carriers of the current in the cell.
3. Individual reaction at each electrode.

Predict the product of electrolysis in the following:

An aqueous solution of AgNO₃ with silver electrodes.

Predict the product of electrolysis in the following:

An aqueous solution AgNO₃ with platinum electrodes.

Predict the product of electrolysis in the following:

A dilute solution of H₂SO₄ with platinum electrodes

Predict the product of electrolysis in the following:

An aqueous solution of CuCl₂ with platinum electrodes.

how can photochemical smog be controlled?

The bond between B and C will be ______.

Dipole-dipole forces act between the molecules possessing permanent dipole. Ends of dipoles possess ‘partial charges’. The partial charge is ______.

Dihydrogen can be prepared on commercial scale by different methods. In its preparation by the action of steam on hydrocarbons, a mixture of \[\ce{CO}\] and \[\ce{H2}\] gas is formed. It is known as:

(i) Water gas.

(ii) Syngas.

(iii) Producer gas.

(d) Industrial gas.

Write one chemical reaction for the preparation of \[\ce{D2O2}\].

How do you account for the strong reducing power of lithium in aqueous solution?

Lithium resembles magnesium in some of its properties. Mention two such properties and give reasons for this resemblance.

All compounds of alkali metals are easily soluble in water but lithium compounds are more soluble in organic solvents. Explain.

Assertion (A): The carbonate of lithium decomposes easily on heating to form lithium oxide and CO₂.

Reason (R): Lithium being very small in size polarises large carbonate ion leading to the formation of more stable Li₂O and CO₂.

Lithium hydride can be used to prepare other useful hydrides. Beryllium hydride is one of them. Suggest a route for the preparation of beryllium hydride starting from lithium hydride. Write chemical equations involved in the process.

What is meant by hybridisation? Compound CH₂ = C = CH₂ contains sp or sp² hybridised carbon atoms. Will it be a planar molecule?

Which of the following will not show geometrical isomerism?

Alkynes on reduction with sodium in liquid ammonia form trans alkenes. Will the butene thus formed on reduction of 2-butyne show the geometrical isomerism?

Photochemical smog occurs in warm, dry and sunny climate. One of the following is not amongst the components of photochemical smog, identify it.

Which of the following statements is not true about classical smog?