11th Class Chemistry Alkali Metals Question Bank 11th CBSE Chemistry Alkali Metals

  • question_answer What is the action of heat on the following? (a) Hydrated magnesium chloride              (b) Gypsum (c) Calcium bicarbonate                            (d) Epsom salt

    Answer:

                    (a) \[MgC{{l}_{2}}.6{{H}_{2}}O\xrightarrow{Heat}MgO+5{{H}_{2}}O+2HCl\] (b) (c) \[Ca{{(HC{{O}_{3}})}_{2}}\xrightarrow{Heat}\,CaC{{O}_{3}}+{{H}_{2}}O+C{{O}_{2}}\] (d) \[\underset{\text{Epsom}\,\,\text{salt}}{\mathop{MgS{{O}_{4}}}}\,.\,7{{H}_{2}}O\xrightarrow[-6{{H}_{2}}O]{423\,K}\,MgS{{O}_{4}}.{{H}_{2}}O\xrightarrow[-{{H}_{2}}O]{503\,K}\,MgS{{O}_{4}}\xrightarrow[\text{heating}]{\text{Strong}}\,MgO+S{{O}_{3}}\]


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