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question_answer1) Sodium forms peroxide while lithium gives monoxide.
question_answer2) Solutions of alkali metals in liquid ammonia are blue as well as conducting.
question_answer3) Sodium metal can be used to dry diethyl ether but not ethyl alcohol.
question_answer4) \[L{{i}^{+}}\] ion is far smaller than the other alkali metal ions but moves through the aqueous solution less rapidly than the other alkali metal ions under the influence of electric current.
question_answer5) Salts of lithium having small anions are more stable than the salts having large anions.
question_answer6) An aqueous solution of iodine becomes colourless on adding excess of sodium hydroxide to it.
question_answer7) Lithium iodide is more covalent than lithium fluoride.
question_answer8) Standard solution of sodium hydroxide cannot be prepared by weighing.
question_answer9) Sodium salts in aqueous solution are either neutral or alkaline in nature.
question_answer10) Among the alkali metal halides, lattice enthalpy is maximum for LiF and least for \[CsI\].
question_answer11) Sodium fire in the laboratory should not be extinguished by pouring water.
question_answer12) Table salt becomes wet in rainy season.
question_answer13) Beryllium chloride fumes in air.
question_answer14) \[B{{a}^{2+}}\] ions are poisonous yet \[BaS{{O}_{4}}\] is given to patients prior to taking stomach X-rays.
question_answer15) Magnesium oxide is used as a refractory material.
question_answer16) \[M{{g}^{2+}}\] ion is more highly hydrated than \[N{{a}^{+}}\] ion.
question_answer17) Magnesium burns in air to give a white ash which when reacted with water gives smell of ammonia.
question_answer18) The crystalline salts of alkaline earth metals contain more molecules of water of crystallisation than the corresponding salts of alkali metals.
question_answer19) \[N{{a}_{2}}S{{O}_{4}}\] is water soluble while \[BaS{{O}_{4}}\] not.
question_answer20) \[Mg{{(OH)}_{2}}\] is a weaker base than NaOH.
question_answer21) A piece of burning Mg keeps on burning in a jar of sulphur dioxide.
question_answer22) During the extraction of sodium by Down's process, anhydrous calcium chloride is mixed with sodium chloride and the molten mass is electrolysed.
question_answer23) Why is metallic sodium not obtained by carrying out the electrolysis of aqueous solution of sodium chloride?
question_answer24) What is the action of heat on the following? (a) Hydrated magnesium chloride (b) Gypsum (c) Calcium bicarbonate (d) Epsom salt
question_answer25) Group 2 metals (Mg and Ca) are harder and denser than group 1 metals (Na and K).
question_answer26) Hydrated magnesium chloride cannot be dehydrated by heating.
question_answer27) Calcium is generally preferred over sodium to remove traces of water from alcohol.
question_answer28) Why does \[L{{i}_{2}}C{{O}_{3}}\] decompose at a lower temperature as compared to\[N{{a}_{2}}C{{O}_{3}}\]?
question_answer29) The crystalline salts of alkaline earth metals contain more water of crystallisation molecules than the corresponding alkali metal salts. Why?
question_answer30) Which out of sodium or potassium has higher melting point?
question_answer31) Among alkali metals in aqueous solution, \[L{{i}^{+}}\]ion has the lowest mobility. Why?
question_answer32) Why alkali metals impart colour to the flame?
question_answer33) Why can cesium he used in photoelectric cell while lithium cannot?
question_answer34) Lithium has highest ionization enthalpy in group \[I\]elements, yet it is the strongest reducing agent. Why?
question_answer35) Sodium fire in the laboratory should not be extinguished by pouring water. Why?
question_answer36) Why is it that on being heated in excess supply of air, K, Rb and Cs form super oxides in preference to oxides and peroxides?
question_answer37) Why super oxides of alkali metals are paramagnetic while normal oxides are diamagnetic?
question_answer38) Why alkali metals are normally kept in kerosene oil?
question_answer39) What makes lithium to show properties uncommon to the rest of the alkali metals?
question_answer40) When is a cation highly polarising? Which alkali metal cation has the highest polarizing power?
question_answer41) Why does table salt get wet in rainy season?
question_answer42) Alkaline earth metals always form divalent cations even though their second ionization enthalpies are almost double than their first ionization enthalpies. Explain.
question_answer43) Why is calcium preferred over sodium to remove last traces of moisture from alcohol?
question_answer44) Magnesium metal burns in air to give a white ash. When this ash is treated with water, the odour of ammonia can be detected. Explain.
question_answer45) A piece of burning magnesium ribbon continues to burn in sulphur dioxide. Explain.
question_answer46) Explain why halides of beryllium fume in moist air but other alkaline earth metal halides do not.
question_answer47) What is the hybrid state of \[BeC{{l}_{2}}\]? What will be the change in hybrid state of \[BeC{{l}_{2}}\] in the solid state?
question_answer48) Halides of Be dissolve in organic solvents while those of Ba do not. Why is it so?
question_answer49) Why \[BaS{{O}_{4}}\] is insoluble whereas \[BeS{{O}_{4}}\] is soluble in water?
question_answer50) What is the difference between milk of lime and lime water?
question_answer51) Chlorination of calcium hydroxide produces bleaching powder. Write its chemical equation.
question_answer52) Why is the temperature maintained around 393 K during the preparation of plaster of paris?
question_answer53) It is necessary to add gypsum in the final stages of preparation of cement. Explain why?
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