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Chapter 5: Problem 27
For each of the questions, four choices have been provided. Select the correct alternative. The number of \(\sigma\) and \(\pi\) bonds in \(\mathrm{C}_{2} \mathrm{H}_{2}\) is (a) 0 and 4 (b) 2 and 2 (c) 3 and 2 (d) 4 and 2
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The necessary steps required to show the formation of \(\mathrm{CCl}_{4}\) by Lewis electron dot diagram have been jumbled. Arrange them in a sequence. (1) Thus, an electron pair is shared between \(\mathrm{C}\) and Cl. This is the Lewis electron dot diagram for \(\mathrm{CCl}_{4}\) (2) Write the symbol of chlorine and represent its valence electrons with the help of crosses, i.e., (3) Write the symbol of carbon and represent its valence electrons with the help of dots, i.e., - (4) When carbon combines with four chlorine atoms, the carbon atom contributes four electrons for sharing, whereas each chlorine atom contributes only one electron for sharing. Thus, both the atoms in \(\mathrm{CCl}_{4}\) attain an octet. (a) 1324 (b) 2134 (c) 4321 (d) 3241
For each of the questions, four choices have been provided. Select the correct alternative. In water molecule, the bond angle of \(104.5^{\circ}\) around oxygen is accounted due to (a) high electron affinity of oxygen (b) very high repulsions between lone pair and bond pair of electrons (c) very high repulsion between lone pair and lone pair electrons (d) small size of hydrogen
During the formation of sodium chloride from its constituents, (a) Na undergoes oxidation and acts as an oxidizing agent. (b) Na undergoes reduction and Cl undergoes oxidation. (c) Cl undergoes reduction and acts as a reducing agent. (d) Na acts as a reducing agent and \(\mathrm{Cl}\) acts as an oxidizing agent.
For each of the questions, four choices have been provided. Select the correct
alternative.
Arrange the following in increasing order of their bond lengths.
\(\mathrm{C}-\mathrm{C}, \mathrm{C}=\mathrm{C}, \mathrm{C} \equiv \mathrm{C}\)
(a) \(\mathrm{C} \equiv \mathrm{C}<\mathrm{C}=\mathrm{C}<\mathrm{C}-\mathrm{C}\)
(b) \(\mathrm{C}=\mathrm{C}<\mathrm{C}-\mathrm{C}<\mathrm{C} \equiv \mathrm{C}\)
(c) \(C=C
For each of the questions, four choices have been provided. Select the correct alternative. An element \(\mathrm{X}\) has low ionization energy and another element \(\mathrm{Y}\) has high electron affinity. The bond formed between them could be (a) ionic (b) polar covalent (c) coordinate covalent (d) non-polar covalent
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