Fill up the blank with the correct choice given in bracket. The most common ore of iron is (Calamine / haematite)

Fill up the blank with the correct choice given in bracket. The salt prepared by the method of direct combination is ______ (iron (II) chloride/ iron (III) chloride)

Fill up the blank with the correct choice given in bracket. Ionic or electrovalent compounds do not conduct electricity in their state. (fused/solid)

Fill up the blank with the correct choice given in bracket. Electrolysis of aqueous sodium chloride solution will form ______ at the cathode. (hydrogen gas/sodium metal)

Fill up the blank with the correct choice given in bracket. Dry hydrogen chloride gas can be collected by _________displacement of air. (downward/upward)

Fill up the table from the given choice.

Fill in the blank with the choices given in brackets : Substitution reactions of reaction are characteristic reaction of ………….. (alkynes/alkenes/alkanes)

Fill in the blanks by using the correct word/term given in the brackets. The blue colour of litmus solution is changed to red by ______ (acid/base)

Fill up the blanks appropriately :

Fill in the blank with the choices given in bracket. When a metallic oxide is dissolved in water, the solution formed has a high concentration of .............. Ions. (H^(+),H_(3)O^(+),OH^(-))

Fill in the blank with the choices given in brackets. Higher the pH value of a solution, the more .............. (acidic/alkaline) it is