NEET Questions Solved

Which ion forms a hydroxide highly soluble in water?

(a) Ni²⁺

(b) K⁺

(c) Zn²⁺

(d) Al³⁺

A colourless salt gives violet colour to Bunsen flame and also turns moistured litmus paper blue. It Is:

(a) Na₂CO₃

(b) KNO₃

(c) K₂CO₃

(d) Cu(OH)₂

Strongest reducing agent among the following is:

(a) K

(b) Na

(c) Al

(d) Mg

When crystal of caustic soda is exposed to air, a liquid layer is deposited because:

(a) crystal melts

(b) crystal loses water

(c) crystal absorbs moisture and CO₂

(d) crystal sublimes

Which one of the following is formed on dissolving I₂ in aqueous solution of KI ?

(a) KIO₄

(b) KIO

(c) KI₃

(d) KIO₃

Brine is chemically:

(a) conc. solution of Na₂CO₃

(b) conc. solution of Na₂SO₄

(c) conc. solution of NaCl

(d) conc. solution of alum

Sodium reacts with water less vigorously than potassium because:

(a) it has higher atomic weight

(b) it is less electropositive

(c) it is more electronegative

(d) it is metal

Which property increases in magnitude as the atomic number of alkali metals increases ?

(a) Electronegativity

(b) First ionisation energy

(c) Ionic radius

(d) Melting point

Common table salt becomes moist and does not pour easily in rainy season because:

(a) it contains magnesium chloride

(b) it contains magnesium carbonate

(c) it melts slightly in rainy season

(d) sodium chloride is hygroscopic

a  mixture of Al(OH)₃ and Fe(OH)₃ can be seperated easily by treating it with:

(a) HCl

(b) NH₄OH

(c) HNO₃

(d) NaOH