Name the ions furnished by
(a) bases in solution
(b) a weak alkali
(c) an acid.

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Solution

(a) Bases in a solution furnish oxide ( $O^{2 -}$ ) or hydroxide ( ${OH}^{-}$ ) ions.
(b) A weak alkali furnishes hydroxide ( ${OH}^{-}$ ) ions.
(c) An acid furnishes hydrogen ( $H^{+}$ ) or hydronium ( $H_{3} O^{+}$ ) ions.

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Similar questions

Q. (a) Define an acid and a base. Give two examples of each.
(b) Give the names and formulae of two strong bases and two weak bases.
(c) What type of ions are formed:
(i) when an acid is dissolved in water?
(ii) when a base (or alkali) is dissolved in water?
(d) Write the neutralisation reaction between acids and bases in terms of the ions involved.
(e) Write any two important uses of bases.

Q. Name
(a) a metallic hydroxide soluble in excess of NH₄OH.
(b) a metallic oxide soluble in excess of caustic soda solution.
(c) a strong alkali
(d) a weak alkali
(e) two coloured metal ions.
(f) two bases which are not alkalis but dissolve in strong alkalis.
(g) a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.

Q. Which of the following ions is furnished by acids in aqueous solution?

Name :

(a) a metallic hydroxide soluble in excess of $N H_{4} O H$ .
(b) a metallic oxide soluble in excess of caustic soda solution. (c) a strong alkali.
(d) a weak alkali.
(e) two colourless metal ions.
(f) two coloured metal ions.
(g) a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.
(h) two bases which are not alkalis but dissolve in strong alkalis. (i) a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
(j) a colourless cation, not a representative element.

Q. Assertion :The value of enthalpy of neutralisation of weak acid and strong base is always numerically less than

57.1 k J

. Reason: All the

{O H}^{-}

ions furnished by

1

gram equivalent of strong base are not completely neutralized.

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Name the ions furnished by (a) bases in solution (b) a weak alkali (c) an acid.

(a) Bases in a solution furnish oxide (O2-) or hydroxide (OH-) ions. (b) A weak alkali furnishes hydroxide (OH-) ions. (c) An acid furnishes hydrogen (H+) or hydronium (H3O+) ions.

Name the ions furnished by
(a) bases in solution
(b) a weak alkali
(c) an acid.

(a) Bases in a solution furnish oxide ( $O^{2 -}$ ) or hydroxide ( ${OH}^{-}$ ) ions.
(b) A weak alkali furnishes hydroxide ( ${OH}^{-}$ ) ions.
(c) An acid furnishes hydrogen ( $H^{+}$ ) or hydronium ( $H_{3} O^{+}$ ) ions.