Question

1. Which of the following metal is not an alkali metal? a) magnesium b) rubidium c) sodium d) caesium. 2. Alkali metals are strongly _____________. a) neutral b) electropositive c) electronegative d) non-metallic. 3. What happens when alkali metals are exposed to moist air? a) formation of nitrates b) formation of oxides c) formation of chlorides d) formation of sulphates. 4. Lithium fluoride is _____________ in water. a) completely soluble b) soluble c) insoluble d) cannot say. 5. The molecule, which contains sp3 d 2 and p orbitals overlapping in it is (a)PCl5 (b)BrF5 (c)ClF3 (d)IF7. 6. Homolytic fission of C-C bond of ethane (C2H6) which gives an intermediate in which carbon atom is (a) sp3 hybridized (b) sp2 hybridized (c) sp hybridized (d) sp3 d hybridized. 7. In BrF3 molecule the lone pairs occupy an equatorial position to minimize (a) lone pair-bond pair repulsion only (b) bond pair-bond pair repulsion only (c) lone pair-lone pair repulsion and lone pair-bond pair repulsion (d) lone pair-lone pair repulsion only. 8. Hybridization is due to the overlapping of (a) Orbitals of different energy levels (b) Orbitals of different energy content (c) Orbitals of same energy content (d) None of the above. 9. The two carbon atoms in acetylene are (a) sp3 hybridized (b) sp2 hybridized (c) sp hybridized (d) Unhybridized. 10.According to bayer strain theory _______________ cycloalkane is most stable. (a) Cyclopropane (b) Cyclohexane (c) Cyclopentane (d) Cyclobutane. 11.Acetylene is obtained by the electrolysis of (a) Sodium succinate (b) Sodium Fumarate (c) Both (d) None of these. 12.Alkynes are ________ in water and the melting point_______with increase in molar mass. (a) soluble, decrease (b) insoluble increase (c) insoluble, decrease (d) soluble, increase. 13.Ethyne on oxidation with alcoholic KMnO4 forms (a) Hydrochloric acid (b) Oxalic acid (c) Acetic acid (d) Formic acid. 14.Which of the following assumption explains great compressibility of gases? a) the actual volume of the gas molecules is negligible b) there is no force of attraction c) particles are always in random motion d) different particles have different speeds. 15.Gases ________ and occupy all the space that is available to them a) contract b) compress c) expand d) shrink.​

Answer 1

1) magnesium

2)electropositive

3)Formation of oxide

4)soluble

5)CIF3

6)sp2 hybridised

Answer 2

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