A compound 'X' combines with water, is a exothermic reaction and forms product 'Y' is used for white washing of walls. Identify 'X' and 'Y' respectively.CaCO3, Ca(OH)2CaO, CaCO3CaO, Ca(NO3)2CaO, Ca(OH)2

A solution of a substance ‘X’ is used for white washing.(i) Name the substance ‘X’ and write its formula.(ii) Write the reaction of the substance ‘X’ named in (i) above withwater

A compound 'X' of sodium forms a white powder. It is a constituent of baking powder and is used in some antacids. When heated, it gives a compound 'Y' and it is a basic salt formed by the neutralisation reaction between sodium hydroxide and a weak acid, Z.

Q9: A chemical compound 'X' is used in the soap and glass industry. It is prepared from brine.(a) Write the chemical name, common name and chemical formula of 'X'.(b) Write the equation involved in its preparation.(c) What happens when it is treated with water containing Ca or Mg salts?      [2020]

Metal X forms an oxide that reacts with acids but not with strong alkalis .  Metal y forms an oxide that reacts with acids and strong alkalisMetal Z forms a hydroxide that is not decomposed by heating Which combination BEST identifies X , Y and Z ? AX= calcium , Y = zinc , Z = magnesium BX= iron , Y = aluminium , Z = sodiumCX= aluminium , Y = sodium, Z = calcium DX= magnesium , Y = copper , Z = potassium

The compound (X) on heating gives a colourless gas. The residue dissolved in water to obtain (Y). Excess CO2 is bubbled through aqueous solution of (Y), (Z), is formed. (Z) on gentle heating gives white (X). The compound (X) is :ACaCO3 BNa2CO3 CCaSO4.2H2O DK2CO3