Covalent bonding in carbon

2024MCQ·1 mark·Q4

Carbon compounds: (i) are good conductors of electricity. (ii) are bad conductors of electricity. (iii) have strong forces of attraction between their molecules. (iv) have weak forces of attraction between their molecules. The correct statements are:

1. (a) (i) and (ii)
2. (b) (ii) and (iii)
3. (c) (ii) and (iv)
4. (d) (i) and (iii)

2023MCQ·1 mark·Q7

Consider the structures of the three cyclic carbon compounds A, B and C given below and select the correct option from the following:

1. (a) A and C are isomers of hexane and B is benzene.
2. (b) A is an isomer of hexane, B is benzene and C is an isomer of hexene.
3. (c) A is a saturated cyclic hydrocarbon and B and C are unsaturated cyclic hydrocarbons.
4. (d) A is cyclohexane and B and C are the isomers of benzene. [A is a six-membered ring with each carbon bonded to two hydrogens (cyclohexane); B and C are six-membered rings with alternate double bonds and one hydrogen per carbon (benzene / Kekule structures).]

2022Very short answer·2 marks·Q1

(a) Write the molecular formula of the following carbon compounds: (i) Methane (ii) Propane. (b) Carbon compounds have low melting and boiling points. Why?

2022Short answer·3 marks·Q9(b)

(i) Write the molecular formula of benzene and draw its structure. (ii) Write the number of single and double covalent bonds present in a molecule of benzene. (iii) Which compounds are called alkynes?