The molecular formula of bleaching powder is

• CaCl₂

• Ca₂OCl₂

• CaOCl₂

• CaCl₂.CaOCl

A solution of sodium metal in liquid ammonia is a strong reducing agent due to the presence of

• sodium atoms

• sodium hydride

• sodium amide

• solvated electron

Which of the following metals has highest melting point

• Barium

• Calcium

• Strontium

• Radium

Which of the following pairs of compounds cannot exist together?

• NaHCO₃ and NaCl

• NaHCO₃ and NaOH

• NaHCO₃ and Na₂CO₃

• Na₂CO₃ and NaOH

Which of the following properties of lithium does not show diagonal relationship with magnesium?

• Formation of Li⁺ ion

• Formation of Li₃N

• Solubility of LiHCO₃

• Thermal decomposition of Li₂CO₃

Which of the following carbonates decomposes at lowest temperature?

• MgCO₃

• CaCO₃

• BaCO₃

• SrCO₃

A white-coloured inorganic compound, on heating, gives a gas which turns lime water milky and residue is left which is yellow when hot and turns white on cooling. The compound is

• Pb(NO₃)₂

• PbCO₃

• BaCO₃

• ZnCO₃

308.

Prussian blue is formed when

• ferrous sulphate reacts with FeCl₃

• ferric sulphate reacts with K₄[Fe(CN)₆]

• ferrous ammonium sulphate reacts with FeCl₃

• ammonium sulphate reacts with FeCl₃

Benedict solution provides

• Ag⁺

• Li⁺

• Cu²⁺

• Ba²⁺

The colour of the flame of sodium is

• deep red

• blue

• green

• golden yellow