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| Chemistry 12th Chapter 3 - Group III A and Group IVA Elements Questions Bank |
Chemistry 2nd Year Chapter 3 - Group III A and Group IVA Elements Solved MCQs, Important Short Questions and Long Questions Bank
MCQs
Please select the right answer.
1. A gas which burn with blue flame is:
2. Al is badly corroded by:
3. Alum is not used:
4. Aluminium reacts with caustic soda to form:
5. Aluminum oxide is:
6. Aluminum oxide is:
7. B₂H₆ is an example of:
8. Basic lead chromate is formed when lead chromate is boiled with:
9. BF₃ acts as acid according to the concept of:
10. BF₃ acts as Lewis acid because it behaves as:
11. Borax bead test is used for the identification of metal that form:
12. Boric acid cannot be used:
13. Boric acid is formed when borax reacts with:
14. Boric Acid reacts with caustic soda to produce:
15. Boron is always found in nature combined with:
16. C+ SnO₂ --> Sn + CO₂: In this reaction carbon acts as a:
17. Chemical composition of Colemanite is:
18. Chief ore of Al is:
19. Chrome yellow:
20. Compounds of Boron behave as Lewis acids because of:
21. Corundum is:
22. Elements which exhibits maximum catenation property:
23. Ethyl borate is formed when boric acid is reacted with:
24. Gibbsite contain ____ water molecules:
25. In Borax Bead Test, colour of Cupric borates are
26. In Borax bead test, when borax is heated with cobalt oxide it forms bead of:
27. In the dried up lakes of Tibet and California _____ is found:
28. Inert pair effect plays an important role in case of:
29. Moderate electrical conductivity is shown by:
30. Nitric acid can be transported in a container made up of:
31. On increasing temperature electrical conductivity of boron:
32. Ordinary glass is:
33. Ortho-boric acid on strong heating to red heat gives:
34. orthoboric acid when heated to red hot gives
35. Pb₃O₄ has chemical name of:
36. S, Se, Te and Po are called:
37. Sindur used by Indian women is chemically:
38. Stable shape in which PbCrO₄ exist:
39. Sulphur is not present in:
40. Talc is used in:
41. The aqueous solution of borax is
42. The Chemical formula for white lead is:
43. The Chemical formula of Lead sub oxide:
44. The chief ore of aluminium is:
45. The compound which forms the bead in Borax bead test is:
46. The element which exhibits maximum catenation property is:
47. The highly rigid under cooled liquid silica is called:
48. The metal which does not give borax bead test is
49. The non-polar oxide is:
50. The only metal in group IIIA is:
51. The semiconductor material among following is:
52. Tincal is a mineral of
53. Tincal is a mineral of:
54. Two elements frequently used for making transistors are:
55. Valence shell electronic configuration of the elements of group IIIA is:
56. What is the formula of Kaolin (Clay):
57. What is the nature of solution of Borax:
58. When H₃BO₃ reacts with NaOH, the salt mostly formed is?
59. Which compound of silicon used as filler in soap to make it heavy:
60. Which electronic configuration corresponds to an element of group IIIA of the periodic table:
61. Which element among the following belongs to group IVA of the periodic table:
62. Which element form an ion with change +3:
63. Which element forms an ion with charge 3+:
64. Which is the correct number of lone-pair with oxygen in CO:
65. Which is the formula of clay:
66. Which is the formula of litharge:
67. Which is used in the leather industry?
68. Which metal is protected by a layer of its own oxide:
69. Which metal is used in the thelinite process because of its activity:
70. Which metal is used in thermite process because of its activity:
71. Which naturally occurring substance is SiO₂?
72. Which of the following does not exist?
73. Which of the following elements is not present abundantly in earth's crust?
74. Which of the following is a weak acid:
75. Which of the following is not ore of aluminium?
76. Which of the following is the formula of litharge?
77. Which of the following is used in making fire proof clothes?
78. Which of the following reactions of Al is used in a photo flash:
79. Which of the gas will turns lime water milky:
80. Which of the element is not present abundantly in earth’s crust:
81. Which of the radicals give blue colour (in cold and hot state) in oxidizing flame when subjected to Borax Bead test:
82. Which one is more stable
83. Which one is no use of boric acid?
84. Which one of the following compounds is not organic in nature?
85. Which one of the following halides is polymeric in nature?
86. Which one of the following is not a use of boric acid:
87. Which one of the following is not a use of red lead, Pb₃O₄:
88. Which one of the following is not an ore of Aluminum:
89. Which one of the given is amphoteric in nature?
Short Questions
1. B⁺³ ion does not exist but AI+3 ion does.Why?
2. Borate glazes are better than silicate glazes. Explain.
3. Define semiconductor. Write its properties.
4. Give the formula of talc or soap stone. Gives its properties and uses?
5. Give the formulae of four boric acids.
6. Give the names and formulas for oxyacids of boron?
7. Give the names and the formula of different acids of boron?
8. Give two similarities between carbon and silicon.
9. Give uses of boric acid?
10. Give uses of lead sub oxide.
11. How Al finds its uses in metallurgy and photoflash bulbs?
12. How aqueous solution of Borax is alkaline?
13. How borax can be converted to orthoboric acid?
14. How Boron differs from members of its family?
15. How carbon on behaves differently from other members of its own group?
16. How does AI become water soluble by using NaOH?
17. How does AI react with conc.HNO₃?
18. How does AI react with dil.and conc.H₂SO₄?
19. How does H₃BO₃ act as an acid?
20. How does the temperature influence the water of crystallization of borax?
21. How H₃BO₃ can be prepared from colemanite?
22. How H₃BO₃ can be prepared from Na₂B₄O₇?
23. How H₃BO₃ with C₂H₅OH and Na₂CO₃?
24. How inert pair effect controls the oxidation state of Sn and Pb?
25. How litharge changes its colour?
26. How sodium silicate is prepared?
27. How the clay is hardened?
28. How the elements of group III-A show the valency of three?
29. How the glassy mass is produced from borax?
30. How the nature of the oxides of the group III-A change from upper to the downward direction?
31. How the solubility of borax changes with the change of temperature?
32. How weathering phenomenon converts potassium feldspar into clay?
33. How will you convert boric acid into borax and vice versa?
34. Justify that the aqueous solution of borax turns red litmus blue?
35. Mention various allotropic modifications of elements of group IV-A especially carbon?
36. Outline the four use of borax?
37. Show that H₃BO₃ is a monobasic acid.
38. The hydrides of boron have different structures from the hydrides of other family members.How?
39. What are the different forms in which SiO₂ exists in the earth’s crust?
40. What are the important ores and minerals of AI?
41. What are the important ores of SiO₂?
42. What are the properties of water glass?
43. What are the uses of aluminium silicates or clay?
44. What are the uses of sodium silicate?
45. What is anodizing?
46. What is asbestos? Give its uses?
47. What is boric acid? Give its uses.
48. What is chemical garden?
49. What is chemistry of Borax bead test?
50. What is meant by chemical garden?
51. What is quartz and what are its properties?
52. What is silica glass?
53. What is the action of heat on orthoboric acid?
54. What is the effect of heat on H₃BO₃?
55. What is the effect of temperature on semiconductor?
56. What is the nature of compounds which give colored beads in borax bead test?
57. What is vitreous silica? Give its two uses.
58. Which basic radicals give the response to borax bead test?
59. Which elements and compounds act as semiconductor?
60. Why AI is not found free in nature?
61. Why aqueous solution of borax is alkaline?
62. Why are liquid silicones preffered over ordinary organic lubricants?
63. Why carbon behaves differently from other members of its group?
64. Why CO₂ is a gas while SiO₂ is a solid at room temperature?
65. Why diamond is non-conductor of electricity and graphite is good conductor?
66. Why is CO₂ a gas at room temperature while SiO₂ is a soild?
67. Why liquid silicones are preferred over ordinary organic lubricants?
68. Why the heat of sublimation in III-A group elements decrease down the group?
69. Write any four uses of Aluminium.
70. Write down chemical formulae of colemanite and bauxite.
71. Write down formulas of Bauxite and corundum.
72. Write four uses of Borax?
73. Write four uses of sodium silicate.
74. Write the reactions of boric acid with i. Ethyl alcohol ii. NaOH
75. Write two principle uses of Borax?
76. Write two reactions for the preparation of Borax.
Long Questions
1. Describe four points of peculiar behavior of Boron.
2. Explain that aqueous solution of borax is alkaline in nature.
3. Write two preparations and two chemical reactions of Borax.
4. Write down two methods for the preparation of borax. Also explain the action of heat on borax.
5. Explain borax bead test with its chemistry
6. How will you convert boric acid into borax and vice versa?
7. Discuss effect of heat on boric acid
8. What is boric acid? Give its properties.
9. How and under what conditions does aluminium react with : (i) O₂ (ii) NaOH (iii) H₂SO₄ (iv) N₂
10. Write a method of water glass. Also write uses of water glass.
11. Write a note on aluminium silicate.
12. What are silicones? Give its formula. Write any four uses of silicones.
13. Define semi-conductors. Give example. Write two properties and two uses of semi-conductors.
14. Discuss the importance of Oxides of Lead in Paints.