Here is a vast collection of objective and subjective questions in this question bank of chemistry 12, chapter 02. Following types of questions have been included here.
- MCQs (Textbook Exercise)
- MCQs (Previous Boards Essentials)
- SQs Topic-wise (Previous Boards Essentials + Textbook Conceptuals)
- LQs (Previous Boards Essentials)
You can find solutions to these questions from our publication, “An Insight Into Objective Chemistry-12”.
MCQs (Textbook Exercise)
Q. Each question has four possible answers. Tick the correct one.
01: Which one of the followings does not belong to alkaline earth metals? (GJR-14,15)(FSL-15,17,18(MLT-15,16,21)(LHR-17)(AJK-15)(BWP-19)
02: The oxides of beryllium are: (GJR-14,21)(MLT-15)(RWP-15)(LHR-17,18)(SWL-18)(FSL-22)
(d) None of these
03: Which ion will have the maximum value of heat of hydration? (SRG-15)(FSL-19)(SRG-19)(RWP-21)(RWP-22)(LHR-22)
04: Which one of the followings is not an alkali metal? (DGK-16,22)(SWL-17)(LHR-19)
05: Which one of the following sulphates is not soluble in water? (AJK-16)(SRG-17)(MLT-19,22)(FSL-19)(RWP-19)(DGK-21)(LHR-21)(BWP-21)
(a) Sodium sulphate
(b) Potassium sulphate
(c) Zinc sulphate
(d) Barium sulphate
06: The element Cesium bears resemblance with: (SRG-15)(DGK-19)(GJR-22)
(c) Both of these metals
(d) None of these
07: Chile saltpetre has the chemical formula: (LHR-14,15,16,19,22)(MLT-14,18,19,21,22)(RWP-14,18)(DGK-15,17,22)(GJR-15)(SWL-16,21,22)(AJK-19)(FSL-21)
08: The mineral CaSO4.2H2O has the general name: (LHR-16)(SRG-16,17,18)(FSL-15)(MLT-17)(RWP-18)
(d) Epsom salt
09: Down’s cell is used to prepare: (SWL-14)(SRG-21)
(a) Sodium carbonate
(b) Sodium bicarbonate
(c) Sodium metal
(d) Sodium hydroxide
10: Which element is deposited at the cathode during the electrolysis of brine in diaphragm cell? (FSL-14)(DGK-15)(BWP-17,19)(MLT-17,18)
MCQs (Previous Boards Essentials)
Q. Each question has four possible answers. Tick the correct one.
01: The word alkali is derived from which language? (RWP-16)
02: Natron has the chemical formula: (DGK-16)
03: Dolomite is a carbonate of: (DGK-16)
04: Which is the least reactive of all alkali metals? (LHR-14)
05: Point out the element which forms super oxide: (LHR-16)
06: Which metal oxide is insoluble in water? (SRG-14)
07: The most metallic element among the followings is: (MLT-14)
08: The milk of magnesia is used for the treatment of: (BWP-14)
09: Which of the following gases will turn lime water milky? (DGK-14)
10: Which compound is added in Down’s cell to lower the melting point of sodium chloride? (FSL-21)
11: In Down’s cell, CaCl2 is added to NaCl to: (RWP-17)(SRG-18)
(a) Increase solubility
(b) Increase the dissociation
(c) Increase conductivity
(d) Lower its melting point
12: General name of mineral MgSO4.7H2O: (SRG-19)
(d) Epsom salt
13: Formula of Epsom salt is: (GJR-19)
14: Compound obtained when sodium burns in excess of air: (SWL-19)
15: Which hydroxide gets decomposed on heating? (GJR-19)
Q.01: Define alkali and alkaline earth metals. (GJR-22)
Q.02: Why are group IA and IIA elements called alkali and alkaline earth metals respectively? (BWP-14)(MLT-15)(SRG-15)(GJR-15,18,21,21)(LHR-17)
Q.03: Differentiate between alkali and alkaline earth metals. Give one example in each case. (LHR-19)
Q.04: Give two properties of alkaline earth metals. (DGK-21)
Q.05: Why are alkali and alkaline earth metals among the most reactive elements of the periodic table?
Q.06: Write down electronic configuration of Na and Ca. (GJR-21)
Q.07: Write formulas of Spodumene and sylvite. (DGK-21)
Q.08: Write formulas of Spodumene and magnesite. (AJK-22)
Q.09: Write formulas of phosphorite & Chile saltpetre. (RWP-17)(BWP-17)(LHR-18)(MLT-22)
Q.10: Give the formulas of the following: (i) Natron (ii) Fluorite. (MLT-22)
Q.11: Write formulas of the minerals: a) Natron b) Halite. (LHR-16)(RWP-18)
Q.12: Write formulas of the following minerals: a) Trona b) Alunite
Q.13: Write formulas of the following minerals: a) Beryl. b) Barite. (SRG-15)(SRG-15)(BWP-17)
Q.14: Write the chemical formulae of: a) Calcite. b) Barite. (BWP-21)(MLT-22)(DGK-22)
Q.15: Give chemical formulas of chrysoberyl and asbestos. (MLT-21)
Q.16: Write formulas of the two common minerals of beryllium. (DGK-14)
Q.17: Write down the formulas of: (i) Carnallite (ii) Gypsum. (DGK-22)
Q.18: Why does lithium show different behaviour from its family members?
Q.19: Write four points of difference of Li from other elements of group IA.
Q.20: Compare the chemical behaviour of lithium with magnesium. (GJR-15)(MLT-18)
Q.21: Write any two points to show the peculiar behaviour of beryllium. (LHR-16)(SWL-17)
Q.22: What happens when Be is treated with NaOH? (SWL-16)(AJK-22)(SRG-22)
2.2: GENERAL BEHAVIOUR OF ALKALI METALS
Q.23: Why are alkali metals very strong reducing agents? (RWP-17)
Q.24: Why are alkali metal hydroxides among the strongest bases?
Q.25: Why are alkali metal hydrides used as powerful reducing agents?
Q.26: The reaction of an alkali metal oxide with water is an acid base reaction, not a redox reaction. Explain. (SRG-21)
Q.27: KO2 is used in breathing equipment for mountaineers and in space crafts, why? (LHR-17)(SRG-18,19)(MLT-19,21)(GJR-22)
Q.28: Prove that BeO is an amphoteric oxide? (SRG-16,17,22)(GJR-17)(SWL-21)
Q.29: Differentiate between lime water and milk of lime? OR What is the chemical nature of lime water and milk of magnesia? (DGK-19)
Q.30: What is milk of magnesia? Give its use? (GJR-15)(SWL-22)
Q.31: Complete the following equations: (a) Mg(NO3)2 + heat ⟶ ? (b) LiOH + heat ⟶ ?
Q.32: What happens when Mg(NO3)2 and LiOH are heated? (DGK-22)
Q.33: What happens when LiOH is heated to red hot? (LHR-22)
Q.34: Why does lithium carbonate decompose on heating while other alkali metal carbonates do not? (DGK-17,18)
Q.35: Why is the aqueous solution of Na2CO3 alkaline in nature? (DGK-14,15,18,22)(LHR-15,21,22)(SRG-15)(FSL-16,17,22)(MLT-21)(AJK-21)(BWP-21)(GJR-22,22)(SWL-22)
Q.36: Why does lime water turn milky with CO2 but becomes clear with excess CO2? (FSL-14,16,18)(SRG-15,18)(SWL-16,17)(RWP-16,19)(AJK-16,19)(DGK-18)(GJR-19)
Q.37: What happens when: (a) LiH is treated with water. (b) Li2CO3 is heated. (MLT-16)(SRG-19,22)(RWP-21)(AJK-22)
Q.38: What happens when? (a) LiNO3 is heated. (b) NaNO3 is heated. (LHR-15)(RWP-18)(SRG-19)
Q.39: Complete and balance the equations: (a) LiNO3 (b) NaNO3 (FSL-21)(LHR-21)
Q.40: Give the decomposition reactions of lithium carbonate and lithium nitrate. (AJK-21)
Q.41: Complete the following reactions: (i) Be + NaOH (ii) LiNO3 + heat (DGK-21)
Q.42: How is gypsum converted into plaster of Paris? OR What is plaster of Paris? (DGK-15,17,18)(RWP-15,17)(SRG-17,18)(LHR-17)(FSL-17)(GJR-18)(MLT-18)
Q.43: What is the effect of heat on CaSO4.2H2O? (SRG-21)
Q.44: How does the solubility of alkaline earth metal sulphates vary down the group?
2.3: COMMERCIAL PREPARATION OF SODIUM BY DOWN’S CELL
Q.45: Why is CaCl2 added to NaCl in Down’s cell? (GJR-17)
Q.46: Point out three advantages of Down’s cell. OR Point out advantages of operating Down’s cell at 600oC? (SRG-15)(GJR-15)(AJK-16)(MLT-18,21)(SWL-21)(DGK-21)(LHR-22)
2.4: COMMERCIAL PREPARATION OF NaOH BY DIAPHRAGM CELL
Q.47: What are two major problems faced during the preparation of sodium hydroxide by Diaphragm or Nelson’s Cell? (BWP-17)(MLT-17,18)(RWP-21)(FSL-21,22)
Q.48: Why asbestos diaphragm is used in Nelson’s Cell?
Q.49: How OH– ions produced in cathode compartment prevented from attracting towards anode?
2.5: ROLE OF GYPSUM IN AGRICULTURE AND INDUSTRY
Q.50: What is the role of sulphur in plant growth? (MLT-17)(LHR-18)
Q.51: What is dead burnt plaster? (MLT-15)(LHR-18)
Q.52: Why do the articles made of plaster of Paris give sharp impressions?
Q.53: Give main uses of Plaster of Paris? (LHR-14)(MLT-15)(FSL-17)(SRG-18)
Q.55: What are cement plaster and hard finish plaster? (DGK-15,18)(SRG-16)(RWP-18)
Q.56: Why is 2% gypsum added to the cement? (LHR-14,16,18,22)(SRG-17)(BWP-17,22)(GJR-19)(FSL-19)(MLT-19,22)(RWP-22)
Q.57: Write any two uses of gypsum in industry. (FSL-22)
2.6: ROLE OF LIME IN AGRICULTURE AND INDUSTRY
Q.58: What is the role of lime in agriculture?
Q.59: What is slaked lime and slaking of lime?
Q.60: What is the function of calcium in plant growth?
Q.61: How are lime and sand used to make glass? (LHR-15,19)(DGK-18)
Q.62: What is lime mortar? How is it prepared? (GJR-14,15)(SRG-15,16)(DGK-16)(RWP-16,18)(SWL-19)(FSL-22)
Q.63: Why is lime added to acidic soils? (LHR-14)(AJK-15)(DGK-16,17)(RWP-17,22)(SRG-17)(GJR-18)
Q.64: How is lime used to prepare acetylene? OR What happens when lime is heated with coke?
Q.65: What is the use of lime as dehydrating agent? Write any four uses of lime in industry. (FSL-19)(MLT-22)
01: Describe the occurrence of alkali metals and alkaline earth metals in nature. (MLT-21)
02: Write down names and formulas of four minerals of sodium. (GJR-22)
03: Give the formulas of Sylvite, Borax, Trona, Natron, Dolomite, Alunite, Asbestos and Barite. (BWP-15)(GJR-21)(FSL-22)
04: How Lithium shows peculiar behavior among alkali metals? Mention any eight properties. (SWL-21)(LHR-22)(DGK-22,22)
05: Give any eight differences of lithium from other alkali metals. (GJR-14,19,19,22)(SRG-15,17)(BWP-17,19)(FSL-17)(SWL-18)(LHR-21)
06: What happens when: (i) Lithium carbonate is heated. (ii) Lithium hydroxide is heated. (iii) Lithium reacts with nitrogen. (iv) Lithium burns in air (BWP-22)
07: Compare the chemical behaviour of lithium with magnesium. (FSL-22)
08: Explain peculiar behavior of Beryllium. (LHR-14,15)(DGK-15)(SRG-16)(FSL-16,18,19,21)(MLT-17)(BWP-18)(RWP-21)(GJR-21)
GENERAL BEHAVIOUR OF ALKALI METALS
09: i) Give the reaction of sodium with oxygen. ii) Give the reaction of Mg with N2 followed by its hydrolysis. (SWL-16)
10: Describe the oxides of alkali and alkaline earth metals. (SRG-14)
11: Write a note on carbonates of alkali and alkaline earth metals. (SRG-15)
12: Complete and balance the following equations: (i) Mg(NO3)2 + heat ⟶ (ii) Ca(OH)2 + SiO2 ⟶ (iii) Be + O2 ⟶ (iv) Be + NaOH ⟶ (LHR-19)
13: Complete and balance the given equations: (i) Mg(NO3)2 + heat ⟶ (ii) Li2O + H2O ⟶ (iii) Na2O2 + H2O ⟶ (iv) NaNO3 + heat ⟶ (MLT-19)
COMMERCIAL PREPARATION OF SODIUM BY DOWN’S CELL
14: Describe with diagram the manufacturing of sodium by Down’s cell. (DGK-14)(GJR-14,15)(RWP-14,15,16,17,19)(LHR-14,17)(MLT-14,15,18,22)(SRG-16,19,21,22)(BWP-17,18,19,21)(SWL-19,22)(AJK-21)
COMMERCIAL PREPARATION OF SODIUM HYDROXIDE BY THE DIAPHRAGM CELL
15: Describe the process for the preparation of sodium hydroxide on commercial scale. (MLT-21)
16: Explain construction and working of diaphragm cell. (DGK-21)
17: Describe commercial preparation of sodium hydroxide by diaphragm cell or Nelson cell. (FSL-14)(MLT-15,19,22)(LHR-15,17)(AJK-16,19)(DGK-16,18,19,21)(SRG-17)(RWP-22)
18: Describe the two problems involved in the manufacture of caustic soda by Nelson cell, and how these problems are solved. (DGK-17)
ROLE OF GYPSUM IN AGRICULTURE AND INDUSTRY
19: Describe the role of gypsum in agriculture. (LHR-14)(BWP-14)
20: What is the role of gypsum in industries? (DGK-15)(GJR-17)(MLT-18)
21: Discuss hard finish plaster and cement plaster. (LHR-22)
ROLE OF LIME IN AGRICULTURE AND INDUSTRY
22: What is the function of calcium in plant growth? (SRG-19)
23: Describe two roles of lime in agriculture and six roles of lime in industry. (LHR-14)(DGK-17)
24: Discuss the role of lime in industry. (AJK-15)(MLT-16)(DGK-16)(LHR-16,19)25: Write any eight uses of lime in industry. (FSL-19)
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