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

The following data are obtained when dinitrogen and dioxygen react together to form different compounds:-

(a) Which law of chemical combination is obeyed by the above experimental data?Give its statement.

(b) Fill in the blanks in the following conversions:

(i) 1 km = ______ mm = ______ pm

(ii) 1 mg = ______ kg = ______ ng

(iii) 1 mL = ______ L = _______ dm³

How do you express the bond strength in terms of bond order?

Compare the relative stability of the following species and indicate their magnetic properties;

`"O"_2, "O"_2^+, "O"_2^-`(superoxide), `"O"_2^(2-)`(peroxide)

Calculate the bond order of N₂, O₂, `"O"_2^+`and `"O"_2^-`?

Write IUPAC name of the product obtained by the ozonolysis of the following compound:

3,4-Dimethyl-hept-3-ene

Write IUPAC name of the product obtained by the ozonolysis of the following compound:

2-Ethylbut-1-ene 

Draw the cis and trans structures of hex-2-ene. Which isomer will have higher b.p. and why?

What effect does branching of an alkane chain has on its boiling point?

One of the reactions that takes place in producing steel from iron ore is the reduction of iron (II) oxide by carbon monoxide to give iron metal and CO₂.

\[\ce{FeO (s) + CO (g) ↔ Fe (s) + CO2 (g)}\]; K_p= 0.265 at 1050 K.

What are the equilibrium partial pressures of CO and CO₂ at 1050 K if the initial partial pressures are: p_CO = 1.4 atm and `"p"_("co"_2)`= 0.80 atm?

What are electrophiles and nucleophiles? Explain with examples.

Identify the reagents shown in bold in the following equation as nucleophiles or electrophiles:

\[\ce{C6H6 + \underline{\text{CH}_3\overset{+}{\ce{C}}{\ce{O}}} -> C6H5COCH3}\]

What is the relationship between the members of following pairs of structures? Are they structural or geometrical isomers or resonance contributors?

\[\begin{array}{cc}
\ce{D}\phantom{......}\ce{H}\\
\backslash\phantom{......}/\\
\ce{C = C}\\
\phantom{...}/\phantom{......}\backslash\phantom{...}\\\ce{H}\phantom{.......}\ce{D}
\end{array}\]

\[\begin{array}{cc}
\ce{D}\phantom{......}\ce{D}\\
\backslash\phantom{......}/\\
\ce{C = C}\\
\phantom{...}/\phantom{......}\backslash\phantom{...}\\\ce{H}\phantom{.......}\ce{H}\end{array}\]

The reaction: \[\ce{CH_3CH_2I + KOH_{(aq)} -> CH_3CH_2OH + KI}\] is classified as ______.

What do you understand by the term ’auto-protolysis’ of water? What is its significance?

Consider the reaction of water with F₂ and suggest, in terms of oxidation and reduction, which species are oxidized/reduced.

Complete the following chemical reaction.

\[\ce{PbS_{(s)} + H_2O_{2(aq)} ->}\] ______ 

Classify the chemical reaction into (a) hydrolysis, (b) redox and (c) hydration reactions.

Complete the following chemical reaction.

\[\ce{MnO^-_{4(aq)} + H_2O_{(g)} ->}\]

Classify the chemical reaction into (a) hydrolysis, (b) redox and (c) hydration reactions.

Complete the following chemical reaction.

\[\ce{CaO_{(s)} + H_2O_{(g)} ->}\]?

Classify the chemical reaction into (a) hydrolysis, (b) redox and (c) hydration reactions.

Complete the following chemical reaction.

\[\ce{AlCl_{3(g)} + H_2O_{(l)} ->}\] ?

Complete the following chemical reaction.

\[\ce{Ca_3N_{2(s)} + H_2O_{(l)} ->}\] ?

Classify the chemical reaction into (a) hydrolysis, (b) redox and (c) hydration reactions.