If NaOH is added to an aqueous solution of Zn²⁺ ions, a white precipitate appears and on adding axcess NaOH, the precepitate dissolves. In this solution zinc exists in the:

Brine is chemically:

NO₂ is obtained by heating:

Soda lime is:

Molecular formula of Glauber's salt is :

Among the following, which has minimum solubility in water?

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

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

When CO₂ is bubbled into an aqueous solution of Na₂CO₃, the following is formed:

Baking soda or baking powder is:

The element which does not dissolve in caustic soda is:

The principal products obtained on heating iodine with concentrated caustic soda solution are:

The formula of washing soda is:

When sulphur is heated with NaOH(aq) the compounds formed are:

NaOH is prepared by the electrolysis of:

Which of the following acts as reducing agent as well as oxidising agent?

Nitrates of I group (except LiNO₃) on heating give:

The most basic compound among the following is -

Indian saltpetre is:

Microcosmic salt has the formula:

The alkali metal which acts as a nutrient for plants is:

An ion that has the largest size among the following is :

Which salt will not impart color to flame?

Which of the following alkali metal ion in aqueous solution is the best conductor of electricity?

An ion among the following that have largest size in an aqueous solution is -

A colourless salt among the following that gives violet colour to Bunsen flame is -

A compound soluble in pyridine is:-

Dissolving metallic Zn in excess of NaOH produces:-

 Superoxide is formed on heating with an excess of air by:-

For the alkali metals, which of the following increases with increasing atomic number:-