MULTIPLE CHOICE QUESTIONS- AIDS, BASES AND SALTS

1. When a metal replaces hydrogen atom then compound form isA. oxideB. etherC. saltD. alcohol

2. KOH is used in making ofA. drain cleanerB. antacidC. cementD. liquid soap

3. If concentration of H+ is greater than 1 x 10-7 then solution isA. neutralB. basicC. acidicD. aqueous

4. Acid used for manufacture of fertilizers and explosives isA. Nitric acidB. Sulfuric acidC. phosphoric acidD. hydrochloric acid

5. Salt among following isA. HClB. KClC. HNO3

D. H3PO4

6. As an electrolyte, water isA. strongB. neutralC. weakD. a good insulator

7. Process in which acids (H+) and bases (OH-) react to form salts and water is called

A. neutralizationB. hydrogenationC. halogenationD. sublimation

8. A specie which is able to accept a proton is calledA. acid

B. baseC. neutral compoundD. cation

9. Preservatives are used to preserveA. foodB. acidsC. basesD. water

10.Bases leaves blue litmusA. redB. pintC. blackD. unchanged

11.In pure water, concentrations ofA. H+ and OH- ions are equalB. H+ ions is moreC. OH- ions is moreD. Cl- is more

12.Phenolphthalein in acidic solution is1. colorless2. pink colored3. yellow colored4. orange colored

5. If pH value is greater than 7, then solution isA. acidicB. basicC. neutralD. salty

13.When acid reacts with metal carbonate, products areA. saltB. waterC. carbon dioxideD. all of above

14.Amount of Hydrochloric Acid (HCl) secreted daily by gastric glands isA. 1 litB. 3 litC. 2 litD. 4 lit

15.PH at which methyl red changes color isA. 7

B. 5.5C. 3.8D. 9

16.Substances that react with both acids and bases are calledA. neutralB. conjugate basesC. amphoteric substancesD. conjugate acids

17.Acids ionize in water to produceA. OH- ionsB. H+ ionsC. SO4

-2 ionsD. H2O molecules

18.Corrosive effect on skin is caused byA. acidsB. basesC. waterD. mercury

19.PH of water isA. 8B. 3C. 2D. 7

PERIODIC CLASSIFICATION OF ELEMENTS20.Both of elements of 1st period contains valence electrons in

A. M shellB. N shellC. K shellD. S shell

21.In periodic table, helium is placed atA. top left cornerB. bottom right cornerC. bottom left cornerD. top right corner

22.Across period atomic size decreases due toA. shielding effectB. photoelectric effectC. increase in nuclear force of attractionD. decrease in nuclear force of attraction

23.First three periods are

A. long periodsB. short periodsC. moderate periodsD. none of above

24.Chemical properties depends uponA. electronic configurationB. valence shell electronic configurationC. atomic massD. none of above

25.Energy required to remove an electron from outermost shell is calledA. potential energyB. kinetic energyC. mechanical energyD. ionization energy

26.As we go from top to bottom in a group shielding effectA. doesn't changeB. decreasesC. increasesD. none of above

27.Period number of element indicates nA. value of all shellsB. value of valence shellC. value of 1st shellD. none of above

28.Ability of atom to attract electrons towards itself is calledA. electron affinityB. electronegativityC. ionization energyD. shielding effect

29.Average distance between nucleus and outer shell is calledA. atomic sizeB. nuclear sizeC. shielding effectD. none of above

30.Horizontal rows of periodic table are calledA. rowsB. periodsC. columnsD. none of above

31.Period number of 2713Al is

A. 1B. 2C. 4D. 3

32.In periodic table elements with similar valence shell configuration are placed in

A. different groupsB. same groupC. can be placed any whereD. none of above

33.When an electron is added in valence shell thenA. energy is absorbedB. energy is releasedC. energy remains sameD. force of attraction increases

34.Value of ionization energyA. decreases down the groupB. increases down the groupC. remains same down the groupD. none of above

35.Physical properties depends on theA. size of atomB. size of protonC. size of neutronD. no. of electrons

36.Elements that lie in same column haveA. similar propertiesB. different propertiesC. same physical propertiesD. different chemical properties

37.As we go from left to right across period, electron affinityA. increasesB. decreasesC. remains sameD. none of above

38.Elements are arranged in order ofA. decreasing atomic numberB. decreasing atomic massC. increasing atomic numberD. increasing atomic mass

39.Decrease in force of attraction between valence electrons and nucleus by inner electrons is called

A. screening effectB. shielding effectC. photoelectric effectD. dopler effect

40.Upto which element, the Law of Octaves was found to be applicable1. Oxygen2. Calcium3. Cobalt4. Potassium

Answer: (b) Calcium41.According to Mendeleev's Periodic Law, the elements were arranged in the

periodic table in the order of1. Increasing atomic number2. Decreasing atomic number3. Increasing atomic masses4. Decreasing atomic masses

Answer: (c) Increasing atomic masses42.In Mendeleev’s Periodic Table, gaps were left for the elements to be

discovered later. Which of the following elements found a place in the periodic table later

1. Germanium2. Chlorine3. Oxygen4. Silicon

Answer: (a) Germanium43.Which of the following statement (s) about the Modern Periodic Table are

incorrect1. The elements in the Modern Periodic Table are arranged on the basis

of their decreasing atomic number2. The elements in the Modern Periodic Table are arranged on the basis

of their increasing atomic masses3. Isotopes are placed in adjoining group (s) in the Periodic Table4. The elements in the Modern Periodic Table are arranged on the basis

of their increasing atomic number1. (i) only2. (i), (ii) and (iii)3. (i), (ii) and (iv)

4. (iv) onlyAnswer: (b) (i), (ii) and (iii)

44.Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?

1. A, B, C2. B, C, D3. A, D, E4. B, D, E

Answer: (b) B, C, D45.The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13

respectively. Which pair of elements belongs to the same group?1. A and B2. B and D3. A and C4. D and E

Answer: (a) A and B46.Where would you locate the element with electronic configuration 2,8 in the

Modern Periodic Table?1. Group 82. Group 23. Group 184. Group 10

Answer: (c) Group 1847.An element which is an essential constituent of all organic compounds

belongs to1. Group 12. Group 143. Group 154. Group 16

Answer: (b) Group 1448.Which of the following is the outermost shell for elements of period 2?

1. K shell2. L shell3. M shell4. N shell

Answer: (b) L shell49.Which of the following elements does not lose an electron easily?

1. Na2. F3. Mg

4. AlAnswer: (b) F

50.Arrange the following elements in the order of their decreasing metallic character: Na, Si, Cl, Mg, Al

1. Cl > Si >Al > Mg > Na2. Na >Mg >Al >Si > Cl3. Na > Al > Mg > Cl > Si4. Al > Na> Si > Ca > Mg

Answer: (b) Na > Mg > Al > Si > Cl51.Arrange the following elements in the order of their increasing

nonmetallic character: Li, O, C, Be, F1. F < O < C < Be < Li2. Li < Be < C < O< F3. F < O < C < Be < Li4. F < O < Be < C < Li

Answer: (c) F < O < C < Be < Li52.What type of oxide would Eka– aluminium form?

1. EO3

2. E3O2

3. E2O3

4. EOAnswer: (c) E2O3

53.Three elements B, Si and Ge are1. Metals2. Non-metals3. Metalloids4. Metal, non-metal and metalloid respectively

Answer: (c) Metalloids54.Which one of the following does not increase while moving down the group

of the periodic table?1. Atomic radius2. Metallic character3. Valence4. Number of shells in an element

Answer: (c) Valence55.On moving from left to right in a period in the periodic table, the size of the

atom.1. Increases2. Decreases3. does not change appreciably

4. first decreases and then increasesAnswer: (b) Decreases

56.Which of the following set of elements is written in order of their increasing metallic character?

1. Be Mg Ca2. Na Li K3. Mg Al Si4. C O N

Answer: (a) Be Mg Ca57.The element with atomic number 14 is hard and forms acidic oxide and a

covalent halide. To which of the following categories does the element belong?

1. Metal2. Metalloid3. Non-metalLeft-hand side elementAnswer: (b) Metalloid

METALS AND NON - METALS58.What is rust? 

(a) Sodium Oxide(b) Iron oxide.(c) Copper Oxide.(d) Silver Oxide.59. Because of the formation of which of the following lime water turns milky

when carbon dioxide is passed in it?(a) Calcium Carbonate

(b) Calcium bicarbonate

(c) Calcium hydroxide

(d) Sodium carbonate

60. Which of the following is formed when sodium hydroxide reacts with hydrochloric acid?

(a) Calcium chloride

(b) Hydrogen Chloride

(c) Sodium Hydroxide

(d) Sodium Chloride

61.Hydrolysis of water is which type of following reactions?(a) Endothermic

(b) Decomposition

(c) Both (a) and (b)

(d) Combination

62.Silver chloride turns grey because of the formation of which of the following when placed in sun?

(a) Silver Metal

(b) Carbon dioxide

(c) Silver Oxide

(d) Silver sulphate

63.When sulphuric acid is poured over zinc, which of the following gas is formed?

(a) Sulphur dioxide

(b) Hydrogen

(c) Oxygen

(d) Zinc dioxide

64.When copper sulphate solution reacts with iron metal, copper metal is formed. This reaction comes under which of the following category?

(a) Decomposition Reaction

(b) Single Displacement reaction

(c) Double displacement reaction

(d) Combination reaction

65.When copper oxide is heated with hydrogen, copper metal and water are formed. What happens to the copper oxide in this reaction?

(a) Reduction

(b) Oxidation

(c) Oxidation & reduction

(d) Decomposition66.When copper oxide is heated with hydrogen, copper metal and water are

formed. What happens to the Hydrogen in this reaction?(a) Reduction

(b) Oxidation

(c) Both oxidation & Reduction

(d) Decomposition67.When copper oxide is heated with hydrogen, copper metal and water are

formed. Which of the following is oxidising agent in this reaction?(a) Copper oxide

(b) Hydrogen

(c) Copper

(d) Water68.Which one of the following properties is not generally exhibited by

ionic compounds?a. Solubility in waterb. Electrical conductivity in solid statec. High melting and boiling pointsd. Electrical conductivity in molten stateAnswer: (b) Electrical conductivity in solid state

69.Which of the following metals exist in their native state in nature?

i. Cuii. Au

iii. Zniv. Ag

e. (i) and (ii)f. (ii) and (iii)g. (ii) and (iv)h. (iii) and (iv)Answer: (c) (ii) and (iv)

70.Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?

ix. Aux. Cu

xi. Naxii. Km. (i) and (ii)n. (i) and (iii)o. (ii) and (iii)p. (iii) and (iv)

Answer: (d) (iii) and (iv)71.Silver articles become black on prolonged exposure to air. This

is due to the formation ofq. Ag3Nr. Ag2Os. Ag2St. Ag2S and Ag3N

Answer: (c) Ag2S72.Galvanisation is a method of protecting iron from rusting by

coating with a thin layer ofu. Galliumv. Aluminiumw. Zincx. Silver

Answer: (c) Zinc73.Stainless steel is very useful material for our life. In stainless

steel, iron is mixed witha. Ni and Crb. Cu and Crc. Ni and Cud. Cu and AuAnswer: (a) Ni and Cr

74.If copper is kept in open air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of

e. CuSO4

f. CuCO3

g. Cu(NO3)2

h. CuOAnswer: (d) CuO

75.Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?

a. Nab. Fec. Crd. HgAnswer: (d) Hg

76.Which of the following metals are obtained by electrolysis of their chlorides in molten state?

v. Navi. Ca

vii. Feviii. Cu

i. (i) and (iv)j. (iii) and (iv)k. (i) and (iii)l. (i) and (ii)

Answer: (d) (i) and (ii)77.Generally, non-metals are not lustrous. Which of the following

nonmetal is lustrous?a. Sulphurb. Oxygenc. Nitrogend. IodineAnswer: (d) Iodine

78.Which one of the following four metals would be displaced from the solution of its salts by other three metals?

a. Mgb. Agc. Znd. CuAnswer: (b) Ag

79.An alloy isa. an elementb. a compoundc. a homogeneous mixtured. a heterogeneous mixtureAnswer: (c) A homogeneous mixture

80.An electrolytic cell consists ofi. positively charged cathode

ii. negatively charged anodeiii. positively charged anodeiv. negatively charged cathode

a. (i) and (ii)b. (iii) and (iv)c. (i) and (iii)d. (ii) ad (iv)Answer: (b) (iii) and (iv)

81.During electrolytic refining of zinc, it getsa. deposited on cathodeb. deposited on anodec. deposited on cathode as well as anoded. remains in the solutionAnswer: (a) Deposited on cathode

82.An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in air. It reacts vigorously with water. Identify the element from the following

a. Mgb. Nac. Pd. CaAnswer: (b) Na

83.Alloys are homogeneous mixtures of a metal with a metal or nonmetal. Which among the following alloys contain non-metal as one of its constituents?

a. Brassb. Bronzec. Amalgamd. Steel84.Which among the following statements is incorrect for magnesium metal?a. It burns in oxygen with a dazzling white flameb. It reacts with cold water to form magnesium oxide and evolves

hydrogen gasc. It reacts with hot water to form magnesium hydroxide and evolves

hydrogen gasd. It reacts with steam to form magnesium hydroxide and evolves

hydrogen gasAnswer: (b) It reacts with cold water to form magnesium oxide and evolves hydrogen gas

85.Which among the following alloys contain mercury as one of its constituents?

a. Stainless steelb. Alnicoc. Solderd. Zinc amalgamAnswer: (d) Zinc amalgam

86.Reaction between X and Y, forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?

a. Has high melting pointb. Has low melting pointc. Conducts electricity in molten stated. Occurs as solidAnswer: (b) Has low melting point

87.The electronic configurations of three elements X, Y and Z are X — 2, 8; Y — 2, 8, 7 and Z — 2, 8, 2. Which of the following is correct?

a. X is a metalb. Y is a metalc. Z is a non-metald. Y is a non-metal and Z is a metalAnswer: (d) Y is a non-metal and Z is a metal

88.Although metals form basic oxides, which of the following metals form an amphoteric oxide?

a. Nab. Cac. Ald. CuAnswer: (c) Al

89.Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?

a. Diamondb. Graphitec. Sulphurd. FullereneAnswer: (b) Graphite

90.Electrical wires have a coating of an insulting material. The material, generally used is

a. Sulphurb. Graphitec. PVC

d. All can be usedAnswer: (c) PVC

91.Which of the following non-metals is a liquid?a. Carbonb. Brominec. Phosphorusd. SulphurAnswer: (b) Bromine

92.Which of the following can undergo a chemical reaction?a. MgSO4 + Feb. ZnSO4 + Fec. MgSO4 + Pbd. CuSO4 + FeAnswer: (d) CuSO4 + Fe

93.The ability of metals to be drawn into thin wire is known asa. Ductilityb. Malleabilityc. Sonorityd. ConductivityAnswer: (a) Ductility

94.Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?

i. Good thermal conductivityii. Good electrical conductivity

iii. Ductilityiv. High melting point

a. (i) and (ii)b. (i) and (iii)c. (ii) and (iii)d. (i) and (iv) Answer: (d) (i) and (iv)

95.Which one of the following metals does not react with cold as well as hot water?

a. Nab. Cac. Mgd. FeAnswer: (d) Fe

96.Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?

a. FeOb. Fe2O3

c. Fe3O4

d. Fe2O3 and Fe3O4

Answer: (c) Fe3O4

97.What happens when calcium is treated with water?i. It does not react with water

ii. It reacts violently with wateriii. It reacts less violently with wateriv. Bubbles of hydrogen gas formed stick to the surface of calcium

a. (i) and (iv)b. (ii) and (iii)c. (i) and (ii)d. (iii) and (iv) Answer: (d) (iii) and (iv)

98.Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?

a. H2SO4

b. HClc. HNO3

d. All of theseAnswer: (c) HNO3

99.The composition of aqua-regia isa. Dil.HCl : Conc. HNO3 − 3 : 1b. Conc.HCl : Dil. HNO3 − 3 : 1c. Conc.HCl : Conc.HNO3 − 3 : 1d. Dil.HCl : Dil.HNO3 − 3 : 1100. Which of the following are not ionic compounds?

i. KClii. HCl

iii. CCl4

iv. NaCla. (i) and (ii)b. (ii) and (iii)c. (iii) and (iv)d. (i) and (iii)Answer: (b) (ii) and (iii)