TOPIC 1: Preparation and Properties of Alkali Metals and their Compounds}

1. Which of the following alkali metal is highly radioactive?

1) Rubidium

2) Caesium

3) Francium

4) Both 1) and 3)

2. Which compound will show the highest lattice energy ?

1) \(\mathrm{RbF}\)

2) \(\mathrm{CsF}\)

3) \(\mathrm{NaF}\)

4) \(\mathrm{KF}\)

3. Strongest bond is in between

1) \(\mathrm{CsF}\)

2) \(\mathrm{NaCl}\)

3) \(\mathrm{LiBr}\)

4) None of above 4. In crystals which one of the following ionic compounds would you expect maximum distance between centres of cations and anions?

1) \(\mathrm{LiF}\)

2) CsF

3) CsI

4) LiI

5. Which one of the alkali metals, forms only, the normal oxide, \(\mathrm{M}_{2} \mathrm{O}\) on heating in air ?

1) \(\mathrm{Rb}\)

2) \(\mathrm{K}\)

3) \(\mathrm{Li}\)

4) \(\mathrm{Na}\)

6. The ionic mobility of alkali metal ions in aqueous solution is maximum for

1) \(\mathrm{Li}^{+}\)

2) \(\mathrm{Na}^{+}\)

3) \(\mathrm{K}^{+}\)

4) \(\mathrm{Rb}^{+}\)

7. Which of the following pairs of substances would give same gaseous product on reaction with water?

1) \(\mathrm{Na}\) and \(\mathrm{Na}_{2} \mathrm{O}_{2}\)

2) \(\mathrm{Ca}\) and \(\mathrm{CaH}_{2}\)

3) \(\mathrm{Ca}\) and \(\mathrm{CaO}\)

4) \(\mathrm{Ba}\) and \(\mathrm{BaO}_{2}\)

8. Which of the following statements is incorrect?

1) Alkali metal hydroxide are hygroscopic.

2) Dissolution of Alkali metal hydroxide is endothermic.

3) Aqueous solution of alkali metal hydroxides are strongly basic.

4) Alkali metal hydroxides form ionic crystals.

9. Which is most basic in character?

1) \(\mathrm{CsOH}\)

2) \(\mathrm{KOH}\)

3) \(\mathrm{NaOH}\)

4) \(\mathrm{LiOH}\)

10. An inorganic compound which on heating first melts, then solidifies and liberates \(\mathrm{O}_{2}\) gas, the inorganic compound is

1) \(\mathrm{Al}_{2} \mathrm{O}_{3}\)

2) \(\mathrm{KMnO}_{4}\)

3) \(\mathrm{MnO}_{2}\)

4) \(\mathrm{KClO}_{3}\)

11. The element which on burning in air gives peroxide is

1) lithium

2) sodium

3) rubidium

4) cesium

12. Which of the following is known as fusion mixture ?

1) Mixture of \(\mathrm{Na}_{2} \mathrm{CO}_{3}+\mathrm{NaHCO}_{3}\)

2) \(\mathrm{Na}_{2} \mathrm{CO}_{3} \cdot 10 \mathrm{H}_{2} \mathrm{O}\)

3) Mixture of \(\mathrm{K}_{2} \mathrm{CO}_{3}+\mathrm{Na}_{2} \mathrm{CO}_{3}\)

4) \(\mathrm{NaHCO}_{3}\)

13. Which of the following has density greater than water?

1) \(\mathrm{Li}\)

2) \(\mathrm{Na}\)

3) \(\mathrm{K}\)

4) \(\mathrm{Rb}\)

14. Among LiI, NaI, KI, the one which is more ionic and more soluble in water is :

1) \(\mathrm{KI}\)

2) \(\mathrm{NaI}\)

3) LiI

4) None of these

15. Which of the following metal is used along with lithium to make the alloy named 'white metal'?

1) Nickel

2) Aluminium

3) Silver

4) Lead

16. The correct order of radii is -

1) \(\mathrm{Li}<\mathrm{Be}<\mathrm{Mg}\)

2) \(\mathrm{H}^{+}<\mathrm{Li}^{+}<\mathrm{H}^{-}\)

3) \(\mathrm{Mn}^{3+}<\mathrm{Mn}^{2+}<\mathrm{Mn}^{7+}\)

4) \(\mathrm{K}^{+}>\mathrm{Cl}^{-}>\mathrm{S}^{2-}\)

17. The melting point of lithium \(\left(181^{\circ} \mathrm{C}\right)\) is just double the melting point of sodium \(\left(98{ }^{\circ} \mathrm{C}\right)\) because -

1) down the group, the hydration energy decreases.

2) down the group, the ionization energy decreases.

3) down the group the cohesive energy decreases.

4) none of these.

18. Suppose an element is kept in air chamber, than air content was evaluated after sometime, oxygen and nitrogen content was found to be low comparitively. The given element will be

1) \(\mathrm{Li}\)

2) \(\mathrm{Rb}\)

3) \(\mathrm{Na}\)

4) \(\mathrm{K}\)

19. Why lithium react less vigorously with water than other alkali metals?

1) Lithium has most negative E- value

2) Lithium has small size and very high hydration energy.

3) Lithium has least negative E- value

4) Both 1) and 2)

20. Fires, that result from the combustion of alkali metals can be extinguished by

1) \(\mathrm{CCl}_{4}\)

2) sand

3) water

4) kerosene

21. In the replacement reaction

\(\frac{\lambda}{\nearrow} \mathrm{CI}+\mathrm{MF} \longrightarrow \frac{\lambda}{\nearrow} \mathrm{CF}+\mathrm{MI}\)

The reaction will be most favourable if \(M\) happens to be :

1) \(\mathrm{Na}\)

2) \(\mathrm{K}\)

3) \(\mathrm{Rb}\)

4) \(\mathrm{Li}\)

22. Magnitude of which of the following property of alkali metals increases with the increase of atomic number

1) Electronegativity

2) Ionic radius 3) First ionization energy

4) Melting point

23. Alkali metals form peroxides and superoxides except

1) \(\mathrm{Na}\)

2) \(\mathrm{Rb}\)

3) \(\mathrm{Li}\)

4) \(\mathrm{Cs}\)

24. Which of the following is used as a source of oxygen in space capsules, submarines and breathing masks ?

1) \(\mathrm{Li}_{2} \mathrm{O}\)

2) \(\mathrm{Na}_{2} \mathrm{O}_{2}\)

3) \(\mathrm{KO}_{2}\)

4) \(\mathrm{K}_{2} \mathrm{O}_{2}\)

25. Which is an ore of potassium?

1) Carnellite

2) Cryolite

3) Bauxite

4) Dolomite

26. Which of the following statements is correct for CsBr3?

1) It is a covalent compound.

2) It contains \(\mathrm{Cs}^{3+}\) and \(\mathrm{Br}^{-}\)ions.

3) It contains \(\mathrm{Cs}^{+}\)and \(\mathrm{Br}_{3}^{-}\)ions

4) It contains \(\mathrm{Cs}^{+}\), and \(\mathrm{Br}^{-}\)and lattice \(\mathrm{Br}_{2}\) molecule.

27. When potassium dichromate crystal are heated with conc. \(\mathrm{HCl}\)

1) \(\mathrm{O}_{2}\) is evolved

2) Chromyl chloride vapours are evolved

3) \(\mathrm{Cl}_{2}\) is evolved

4) No reaction takes place

28. An alloy of which pair of metals is liquid at ordinary temperature and is used in special thermometers used for finding temperatures above the boiling point of mercury.

1) \(\mathrm{Na}\) and \(\mathrm{Hg}\)

2) \(\mathrm{K}\) and \(\mathrm{Hg}\)

3) \(\mathrm{Na}\) and \(\mathrm{K}\)

4) None of these

29. An alkaline metal oxide which is soluble in \(\mathrm{NaOH}\) has

1) \(\mathrm{NaCl}\) structure

2) wurzite structure

3) CsCl structure

4) rutile structure

30. The alkali metals which form normal oxide, peroxide as well as a super oxides are

1) \(\mathrm{Na}, \mathrm{Li}\)

2) \(\mathrm{K}, \mathrm{Li}\)

3) Li, Cs

4) \(\mathrm{K}, \mathrm{Rb}\)

31. Which of the following compounds are paramagnetic in nature?

1) \(\mathrm{KO}_{2}\)

2) \(\mathrm{K}_{2} \mathrm{O}_{2}\)

3) \(\mathrm{Na}_{2} \mathrm{O}_{2}\)

4) \(\mathrm{Rb}_{2} \mathrm{O}_{2}\)

\section{TOPIC 2: Some Important Compounds of Sodium}

32. When sulphur is heated with \(\mathrm{NaOH}(\mathrm{aq})\) ? The compounds formed are

1) \(\mathrm{Na}_{2} \mathrm{~S}+\mathrm{H}_{2} \mathrm{O}\)

2) \(\mathrm{Na}_{2} \mathrm{SO}_{3}+\mathrm{H}_{2} \mathrm{O}\)

3) \(\mathrm{Na}_{2} \mathrm{~S}+\mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3}+\mathrm{H}_{2} \mathrm{O}\)

4) \(\mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3}+\mathrm{H}_{2} \mathrm{O}\)

33. Sodium carbonate is manufactured by Solvay process. The products which can be recycled are

1) \(\mathrm{CO}_{2}\) and \(\mathrm{NH}_{3}\)

2) \(\mathrm{CO}_{2}\) and \(\mathrm{NH}_{4} \mathrm{Cl}\)

3) \(\mathrm{NaCl}\) and \(\mathrm{CaO}\)

4) \(\mathrm{CaCl}_{2}\) and \(\mathrm{CaO}\).

34. An aqueous solution of salt ' \(\mathrm{R}\) ' when treated with dil. \(\mathrm{HCl}\), a colourless gas is given out. The gas so evolved when passed through acidified \(\mathrm{KMnO}_{4}\) decolourises \(\mathrm{KMnO}_{4}\) solution. The salt ' \(\mathrm{R}\) ' is

1) \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)

2) \(\mathrm{NaClO}_{3}\)

3) \(\mathrm{NaNO}_{2}\)

4) \(\mathrm{Na}_{2} \mathrm{SO}_{3}\)

35. How \(\mathrm{NH}_{3}\) is recovered in Solvay process?

1) By reaction of \(\mathrm{NH}_{4} \mathrm{Cl}\) and \(\mathrm{Ca}(\mathrm{OH})_{2}\)

2) By reaction of \(\mathrm{NH}_{4} \mathrm{HCO}_{3}\) and \(\mathrm{NaCl}\)

3) By reaction of \(\left(\mathrm{NH}_{4}\right)_{2} \mathrm{CO}_{3}\) with \(\mathrm{H}_{2} \mathrm{O}\)

4) By any of the above

36. Baking powder contains :

1) \(\mathrm{NaHCO}_{3}, \mathrm{Ca}\left(\mathrm{H}_{2} \mathrm{PO}_{2}\right)_{2}\) and starch

2) \(\mathrm{NaHCO}_{3}, \mathrm{Ca}\left(\mathrm{H}_{2} \mathrm{PO}_{2}\right)_{2}\)

3) \(\mathrm{NaHCO}_{3}\), starch

4) \(\mathrm{NaHCO}_{3}\)

37. Sodium thiosulphate, \(\mathrm{Na}_{2} \mathrm{~S}_{2} \mathrm{O}_{3} .5 \mathrm{H}_{2} \mathrm{O}\) is used in photography to

1) reduce the silver bromide grains to metallic silver.

2) convert the metallic silver to silver salt.

3) remove undecomposed \(\mathrm{AgBr}\) as soluble silver thiosulphate complex. 4) remove reduced silver.

38. Sodium carbonate solution in water is alkaline due to

1) hydrolysis of \(\mathrm{Na}^{+}\)

2) hydrolysis of \(\mathrm{CO}_{3}^{2-}\)

3) hydrolysis of both \(\mathrm{Na}^{+}\)and \(\mathrm{CO}_{3}^{2-}\) ions

4) none of these

39. Which of the following statements is incorrect?

1) Pure sodium metal dissolves in liquid ammonia to give blue solution.

2) \(\mathrm{NaOH}\) reacts with glass to give sodium silicate.

3) Aluminium reacts with excess \(\mathrm{NaOH}\) to give \(\mathrm{Al}(\mathrm{OH})_{3}\)

4) \(\mathrm{NaHCO}_{3}\) on heating gives \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)

40. Fire extinguishers contain \(\mathrm{H}_{2} \mathrm{SO}_{4}\) and which one of the following?

1) \(\mathrm{NaHCO}_{3}\) and \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)

2) \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)

3) \(\mathrm{NaHCO}_{3}\)

4) \(\mathrm{CaCO}_{3}\)

41. In Castner-Kellner cell for production of sodium hydroxide:

1) Brine is electrolyzed with Pt electrodes 2) Brine is electrolyzed using graphite electrodes 3) Molten sodium chloride is electrolysed 4) Sodium amalgam is formed at mercury cathode 42. Sodium cobaltinitrite is used in the detection of

1) \(\mathrm{K}\)

2) \(\mathrm{Ca}\)

3) \(\mathrm{Sr}\)

4) \(\mathrm{Ba}\)

TOPIC 3: Preparation and Properties of Alkaline Earth Metals and their Compounds

43. Of the metals Be, Mg, Ca and Sr of group II A. In the periodic table the least ionic chloride would be formed by

1) \(\mathrm{Be}\)

2) \(\mathrm{Mg}\)

3) \(\mathrm{Ca}\)

4) \(\mathrm{Sr}\)

44. Which one is known as barytes?

1) \(\mathrm{BaSO}_{4}\)

2) \(\mathrm{BaCl}_{2} \cdot \mathrm{HH}_{2} \mathrm{O}\)

3) \(\mathrm{BaO}\)

4) \(\mathrm{BaCO}_{3}\)

45. Which of the following will precipitate first when aqueous solution containing sulphate ions are added?

1) \(\mathrm{Mg}^{2+}\)

2) \(\mathrm{Ca}^{2+}\)

3) \(\mathrm{Sr}^{2+}\)

4) \(\mathrm{Ba}^{2+}\)

46. Which of the following compounds is used in preparation of green fire ?

1) \(\mathrm{K}_{2} \mathrm{SO}_{4}\)

2) \(\mathrm{NaNO}_{3}\)

3) \(\mathrm{Ba}\left(\mathrm{NO}_{3}\right)_{2}\)

4) None of these

47. Lithopone is

1) \(\mathrm{BaO}+\mathrm{ZnSO}_{4}\)

2) \(\mathrm{BaS}+\mathrm{ZnSO}_{4}\)

3) \(\mathrm{ZnS}+\mathrm{BaSO}_{4}\)

4) \(\mathrm{ZnO}+\mathrm{BaSO}_{4}\)

48. Mixture of \(\mathrm{MgCl}_{2}\) and \(\mathrm{MgO}\) is called :

1) portland cement

2) sorel's cement

3) double salt

4) none of these

49. Which of the following statement(s) is/are correct regarding \(\mathrm{Al}\) and \(\mathrm{Be}\) ?

(i) Both of these react with alkali.

(ii) There is diagonal relationship among these elements.

1) Both (i) and (ii)

2) Only (i)

3) Only (ii)

4) Neither (i) nor (ii)

50. Philosopher's wool on heating with \(\mathrm{BaO}\) at \(1100^{\circ} \mathrm{C}\) produces:

1) \(\mathrm{Ba}+\mathrm{ZnCl}_{2}\)

2) \(\mathrm{BaCdO}_{2}\)

3) \(\mathrm{BaZnO}_{2}\)

4) \(\mathrm{BaO}_{2}+\mathrm{Zn}\)

51. Arrange the following compounds in order of increasing solubility

(i) \(\mathrm{MgF}_{2}\)

(ii) \(\mathrm{CaF}_{2}\)

(iii) \(\mathrm{BaF}_{2}\)

1) (i) < (ii) < (iii)

2) (ii) < (i) < (iii)

3) (ii) < (iii) < (ii)

4) (iii) < (ii) < (i)

52. The first ionization potential of \(\mathrm{Mg}\) is

1) less than \(\mathrm{Al}\)

2) more than \(\mathrm{Al}\)

3) equal to \(\mathrm{Al}\)

4) can be less or more than \(\mathrm{Al}\)

53. Calcium is obtained by the

1) electrolysis of solution of calcium chloride in water

2) electrolysis of molten anhydrous calcium chloride or fused calcium chloride

3) roasting of limestone

4) reduction of calcium chloride with carbon

54. \(\mathrm{BaO}_{2}\) and ozone reacts to produce

1) \(\mathrm{Ba}\)

2) \(\mathrm{Ba}_{2} \mathrm{O}_{3}\)

3) \(\mathrm{BaO}\)

4) \(\mathrm{Ba}(\mathrm{OH})_{3}\)

\section{TOPIC 4: Some Important Compounds of Calcium}

55. Which one of the following is flourspar?

1) \(\mathrm{CaF}_{2}\)

2) \(\mathrm{CaO}\)

3) \(\mathrm{H}_{2} \mathrm{~F}_{2}\)

4) \(\mathrm{CaCO}_{3}\)

56. Gypsum on heating at \(120-130^{\circ} \mathrm{C}\) gives :

1) anhydrous salt

2) hemihydrate

3) monohydrate

4) dihydrate

57. Melting point of calcium halides decreases in the order

1) \(\mathrm{CaF}_{2}>\mathrm{CaCl}_{2}>\mathrm{CaBr}_{2}>\mathrm{CaI}_{2}\)

2) \(\mathrm{CaI}_{2}>\mathrm{CaBr}_{2}>\mathrm{CaCl}_{2}>\mathrm{CaF}_{2}\)

3) \(\mathrm{CaBr}_{2}>\mathrm{CaI}_{2}>\mathrm{CaF}_{2}>\mathrm{CaCl}_{2}\)

4) \(\mathrm{CaCl}_{2}>\mathrm{CaBr}_{2}>\mathrm{CaI}_{2}>\mathrm{CaF}_{2}\)

58. The substance not likely to contain \(\mathrm{CaCO} 3\) is

1) gypsum

2) sea shells

3) dolomite

4) a marble statue

59. Bone ash contains

1) \(\mathrm{CaO}\)

2) \(\mathrm{CaSO}_{4}\)

3) \(\mathrm{Ca}_{3}\left(\mathrm{PO}_{4}\right)_{2}\)

4) \(\mathrm{Ca}\left(\mathrm{H}_{2} \mathrm{PO}_{4}\right)_{2}\)

60. Oxygen is obtained from bleaching powder by

1) the action of dilute acid

4) the action of alkali

3) heating it with lime

4) heating it with cobalt salt