Table salt is hygroscopic due to the presence of :-
1. Mg`(HCO_(3))_(2)`
2. MgS`O_(4)`
3. Mg`Cl_(2)` + Ca`Cl_(2)`
4. MgC`O_(3)`

Write the chemical name of the Mg(HCO_3)_2 ?

Balance the equation Mg+ HNO_(3) to Mg(NO_(3))_(2) + N_(2)O + H_(2)O

The oxidation number of P in Mg_(2)P_(2)O_(7) is

Write the reaction of Mg^(2+) with Na_(2) HP O_(4) in presence of NH_(4) OH and NH_(4) CI.

Permanent hardness of water is due to the presence of salts of Ca and Mg in the form of

Which metal bicarbonates does not exist in solid state? (i) LiHCO_(3) (ii) Ca(HCO_(3))_(2) (iii) Zn(HCO_(3))_(2) (iv) CaS_(2)O_(3)

(a) Name the types of isomerrism shown by the following pairs of compounds: (i) [CoCl(H_(2)O)(NH_(3))_(4)]Cl_(2) and [CoCl_(2)(NH_(3))_(4)]Cl.H_(2)O (ii) [Pt(NH_(3))_(4)]PtCl_(6)] and [Pt(NH_(3))_(4)Cl_(2)][PtCl_(4)] . (b) Write the IUPAC name of [Co(en)_(2)Cl_(2)]^(+) ion and draw the structure of its geometrical isomers.

Calcium phosphide Ca_(3)P_(2) formed by reacting magnesium with excess calcium orthophosphate Ca_(s)(PO_(4))_(2) was hydrolysed by excess water. The evolved. Phosphine PH_(5) was burnt in air to yield phosphrous pentoxide (P_(2)O_(6)) . How many gram of magnesium metaphosphate would be obtain if 192 gram Mg were used (Atomic weight of Mg=24, P=31) Ca_(3)(PO_(4))_(2) + Mg to Ca_(3)P_(2) +_ MgO Ca_(3)P_(2)+H_(2)O to Ca(OH)_(2) + PH_(3) PH_(3) + O_(2) to P_(2)O_(5) + H_(2)O MgO + P_(2)O_(5) to Mg(PO_(3))_(2) " " magnesium metaphosphate.

The products of the chemical reaction between Na_(2)S_(2)O_(3) , Cl_(2) and H_(2)O are

Dow's process of extraction of Mg involves extraction of Mg from sea water. Sea water is concentrated in sun-light and is then treated with slaked lime. Magnesium hydroxide is heated in a stream of HCl to give MgCl_(2) which is electrolysed to discharge Mg. The mixture is in the ratio 35% MgCl_(2)+50% NaCl+15% CaCl_(2) . NaCl and CaCl_(2) are added to lower the fusion temperature and to increases the conductance. Mg^(2+) +Ca(OH)_(2) to Mg(OH)_(2)+Ca^(2+) Mg(OH)_(2)+2HCl to MgCl_(2)+2H_(2)O(l) Electrolysis of fused MgCl_(2) hArr Mg^(2+)+2Cl Mg^(2+)+2e^(-) to Mg ( At Cathode) 2Cl^(-) to Cl_(2)+2e^(-) (At Anode) Mg electrolysed is protected from atmospheric oxidation by a blanket of inert gases. In the hydrated chloride of Mg the value of x is :