Alkaline Earth metals Questions with Answers:
Ques. To remove last traces of water from alcohol, the metal used is
(a) Sodium
(b) Potassium
(c) Calcium
(d) Aluminium
Ques. Setting of plaster of paris is
(a) Oxidation with atmospheric oxygen
(b) Combination with atmospheric CO2
(c) Dehydration
(d) Hydration to yield another hydrate
Ques. MgCl2.6H2O, when heated gives
(a) Magnesium oxide
(b) Magnesium oxychloride
(c) Magnesium dichloride
(d) Magnesium chloride
Ques. Calcium is obtained by
(a) Roasting of lime stone
(b) Reduction of CaCl2 with carbon
(c) Electrolysis of a solution of CaCl2 in water
(d) Electrolysis of molten CaCl2
Ques. Mortar is a mixture of
(a) CaCO3, sand and water
(b) Slaked lime and water
(c) Slaked lime, sand and water
(d) CaCO3 and CaO
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Ques. For bleaching powder, which is incorrect
(a) Reacts with dilute acid to release chlorine
(b) Oxidising agent
(c) Light yellow coloured powder
(d) Highly soluble in water
Ques. The highly efficient method of obtaining beryllium is
(a) Dissociation of beryllium carbide
(b) Electrolysis of fused beryllium chloride
(c) Reduction of beryllium oxide with carbon
(d) Reduction of beryllium halide with magnesium
Ques. Bleaching powder is a compound having the molecular formula
(a) CaOCl3
(b) CaOCl2
(c) CaClO
(d) CaClO3
Ques. Electronegativity of beryllium is approximately equal to that of
(a) Aluminium
(b) Boron
(c) Magnesium
(d) Sodium
Ques. Alloys of …… metal are light and strong and so are used in the manufacture of aeroplane parts
(a) Cr
(b) Sn
(c) Fe
(d) Mg
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Ques. Which of the following alkaline earth metals shows some properties similar to aluminium
(a) Be
(b) Ca
(c) Sr
(d) Ba
Ques. Which of the following substance is used as dehydrating agent in laboratory?
(a) Calcium chloride
(b) Sodium chloride
(c) Sodium carbonate
(d) Potassium nitrate
Ans. (a)
Ques. A major constituent of portland cement except lime is
(a) Silica
(b) Alumina
(c) Iron oxide
(d) Magnesia
Ques. Alkaline earth metals come under
(a) Halogens
(b) Representative elements
(c) Transition elements
(d) Inner transition elements
Ques. Point out the incorrect statement regarding Be (Group-IIA)
(a) It forms an ionic carbide
(b) Its carbonate decomposes on heating
(c) Its halides are covalent
(d) It is easily attacked by water
Ques. Lime stone is
(a) CaO
(b) Ca(OH)2
(c) Both (a) and (b)
(d) None of these
Ques. In the Alkaline earth metals, the element forming predominantly covalent compound is
(a) Be
(b) Mg
(c) Sr
(d) Ca
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Ques. MgCl2 . 6H2O when heated gives
(a) Magnesium oxychloride
(b) Magnesium dichloride
(c) Magnesium oxide
(d) Magnesium chloride
Ques. Which of the following ore contains both magnesium and calcium?
(a) Magnesite
(b) Dolomite
(c) Carnellite
(d) Phosphorite
Ans. (b)
Ques. The property of the alkaline earth metals that increases with their atomic number is
(a) Ionisation energy
(b) Electronegativity
(c) Solubility of their sulphates
(d) Solubility of their hydroxides
Ques. Magnesium does not decompose the
(a) Steam
(b) Hot water
(c) Cold Water
(d) Semi hot water
Ques. A metal M readily forms its sulphate MSO4 which is water-soluble. It forms its oxide MO which becomes inert on heating. It forms its insoluble hydroxide M(OH)2 which is soluble in NaOH solution. Then M is
(a) Mg
(b) Ba
(c) Ca
(d) Be
Ques. Which is used to reduced the acidity of soil
(a) Calcium hydroxide
(b) Ammonium sulphate
(c) Ammonium nitrate
(d) Ammonium chloride
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Ques. Li shows the diagonal relationship with
(a) Mg
(b) B
(c) Al
(d) C
Ques. To prevent magnesium from oxidation in electrolytic extraction process
(a) Some calcium fluoride is added
(b) Some chlorides are added
(c) Metal is taken out by spoons
(d) The whole process is done in an atmosphere of coal gas
Ques. Which of the following gives a green colour to flame?
(a) Barium
(b) Calcium
(c) Strontium
(d) None of these
Ques. Mg burns in CO to produce
(a) MgO2
(b) MgCO3
(c) MgO + CO
(d) MgO + C
Ques. Property of the alkaline earth metals that increases with their atomic number is
(a) Ionisation energy
(b) Solubility of their hydroxides
(c) Solubility of their sulphates
(d) Electronegativity
Ques. The number of water molecules in gypsum and plaster of paris respectively are
(a) 1/2 and 2
(b) 2 and ½
(c) 2 and 1
(d) 5 and 2
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Ques. Plaster of paris is used
(a) In surgery and dentistry
(b) As a white wash
(c) As a constituent of tooth paste
(d) For the preparation of RCC
Ques. A certain metal M is used to prepare an antacid, which is used as a medicine in acidity. This metal accidently catches fire which can not be put out by using CO2 based extinguishers. The metal M is
(a) Ca
(b) C
(c) Mg
(d) All of these
Ques. Which of the following substances is used in the laboratory for fast drying of neutral gases?
(a) Sodium phosphate
(b) Phosphorus pentoxide
(c) Sodium sulphate
(d) Anhydrous calcium chloride
Ques. Sodium sulphate is soluble in water whereas barium sulphate is sparingly soluble because
(a) The hydration energy of Na2SO4 is less than its lattice energy
(b) The hydration energy of Na2SO4 is more than its lattice energy
(c) The lattice energy of BaSO4 is more than its hydration energy
(d) The lattice energy has no role to play in solubility
Ques. Setting of cement is an
(a) Exothermic reaction
(b) Endothermic reaction
(c) Neither exothermic nor endothermic
(d) None of these
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Ques. The most electropositive amongst the alkaline earth metals is
(a) Beryllium
(b) Magnesium
(c) Calcium
(d) Barium
Ques. Deep pink colour is given to flame by the salts of
(a) Strontium
(b) Potassium
(c) Zinc
(d) Barium
Ques. Pure anhydrous MgCl2 can be prepared from the hydrated salt by
(a) Heating the hydrate with coke
(b) Heating the hydrate with Mg ribbon
(c) Melting the hydrate
(d) Heating the hydrate to red heat in an atmosphere of HCl gas
