`2CuCO_(3).Cu(OH)_(2)` is the formula of

Dhydroxy acetrone (CH_(2)OH.CO.CH_(2)OH)) has the general formula of carbohydrate but not included in this class because:

Find the number of reaction from the given reaction which can show calcination process : (i) CaCO_(3).MgCO_(3) overset (Delta) rarr CaO + MgO + 2CO_(2) (ii) CuCO_(3).Cu(OH)_(2) overset (Delta) rarr 2CuO + H_(2)O + CO_(2) (iii) Al_(2)O_(3). 2H_(2)O overset (Delta) rarr Al_(2)O_(3) + 2H_(2)O (iv) 2Cu_(2)S + 3O_(2) overset (Delta) rarr 2Cu_(2) O + 2SO_(2) .

Find the number of reaction from the given reaction which can show calcination process : (i) CaCO_(3).MgCO_(3) overset (Delta) rarr CaO + MgO + CO_(2) (ii) CuCO_(3).Cu(OH)_(2) overset (Delta) rarr 2CuO + H_(2)O + CO_(2) (iii) Al_(2)O_(3). 2H_(2)O overset (Delta) rarr Al_(2)O_(3) + 2H_(2)O (iv) 2Cu_(2)S + 3O_(2) overset (Delta) rarr 2Cu_(2) O + 2SO_(2) .

Match the column - Column-I Column-II {:((a)"Copper pyrites",,,,(P)CaCO_(3)),((b)"Azurite",,,,(Q)2CuCO_(3).Cu(OH)_(2)),((c )"Limestone",,,,(R)CuFeS_(2)),((d)"Sphalerrite",,,,(S)ZnS):}

Which of the following statement (s) is /are correct? (I) CuS is white in colour. (II) KMnO_(4) exists as dark purple black prismatic crystals. (III) Basic copper carbonate is CuCO_(3).Cu(OH)_(2) . (IV) On strong heating, potassium dicheomate decomposes with evolution of oxygen. Choose the correct option.

Formula of calcium hydroxide is Ca(OH)_2 and zinc phosphate is Zn_3(PO_4)_2 , then write the formula of calcium phosphate.

Two important ores of metals are given below Malachite CuCO_(3).Cu(OH)_(2).xH_(2)O Carnallite KCl.MgCl_(2).yH_(2)O What is y-x?

Two important ores of metals are given below Malachite CuCO_(3).Cu(OH)_(2).xH_(2)O Carnallite KCl.MgCl_(2).yH_(2)O What is y-x?