Write equations for the reactions of (i) iron with steam (ii) calcium and potassium with water and (iii) potassium with water.
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Write equations for the reactions of (i) iron with steam (ii) calcium and potassium with water
(i) Iron react with steam to form the metal oxide and hydrogen. 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g) (ii) The reaction of calcium with water is exothermic but the heat evolved...
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Bone matrix is rich in (a) fluoride and calcium (b) calcium and phosphorus (c) calcium and potassium (d) phosphorus and potassium
(b) calcium and phosphorus
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Write the chemical formula of the following: (a) Magnesium chloride (b) Calcium oxide (c) Copper nitrate (d) Aluminium chloride (e) Calcium carbonate
(a) Magnesium chloride →MgCl2 (b) Calcium oxide →CaO (c) Copper nitrate →Cu(NO3)2 (d) Aluminium chloride →AlCl3 (e) Calcium carbonate →CaCO3
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Potassium chlorate (KCIO3) on heating forms potassium chloride and oxygen. Write a balanced equation for this reaction.
2KCIO3 (s) ------>2KCl(s ) + 3O2(g)
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Write word-equations and then balanced equations for the reactions taking place when
(a) Sulphuric acid(aq) + Zinc(s) ------> Zinc sulphate(aq) + Hydrogen(g) H2SO4(aq) + Zn(s) -----> ZnSO4(aq) + H2(g) (b) Hydrochloric acid(aq) + Magnesium(s) -----> Magnesiurn chloride(aq) + Hydrogen(g) 2HCl(aq) + Mg(s ) -----> MgCI2(ag) +...
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Of the three metals X, Y and Z, X reacts with cold water, Y with hot water and Z with steam only. Identify X, Y and Z
X is an alkali metal, Na or K. Y is an alkaline earth metal, Mg or Ca. Z is Fe. Increasing reactivity series: Na > Mg > Fe.
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Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime.
(B) (ii) and (iii) Slaking of lime is accompanied by liberation of heat, hence it is an exothermic reaction. Calcium hydroxide is an alkali and its aqueous solution (i.e., lime water)...
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Marble contains ,(A) calcium hydroxide (B) calcium chloride (C) calcium carbonate (D) calcium oxide
(C) calcium carbonate Marble contains calcium carbonate and its chemical formula is CaCO3.
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What is the difference between displacement and double displacement reactions? Write equations for these reactions:
DISPLACEMENT RECATION : in this recation a more active element displaces or removes other element from a compound in solution . FOR EXAMPLE :- Iron + Copper Sulphate gives Iron Sulphate + Copper DOUBLE...
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Name of the salt from the following which makes the water hard is A) calcium hydrogencarbonate (B) potassium chloride
(A) calcium hydrogencarbonate
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