Q2. Select the correct word from the list in the brackets for each of the following statements:
An example of a base which is not an alkali is ___________. [caustic potash, copper hydroxide, ammonium hydroxide]

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Solution

Copper hydroxide is hydrated copper oxide, and it does provide some concentration of ${OH}^{-}$ ions when it is in the presence of acids ( $H_{3} O^{+}$ ). However, it is largely insoluble in water.
Hence, Copper Hydroxide is the example of the base which is not an alkali.

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Similar questions

Q. Give one example in each case:
(a) A basic oxide which is soluble in water.
(b) A hydroxide which is highly soluble in water.
(c) A basic oxide which is insoluble in water.
(d) A hydroxide which is insoluble in water.
(e) A weak mineral acid.
(f) A base which is not an alkali.
(g) An oxide which is a base.
(h) A hydrogen containing compound which is not an acid.

Give one example in each case :

(a) A basic oxide which is soluble in water,

(b) A hydroxide which is highly soluble in water,

(d) A hydroxide which is insoluble in water,

(e) A weak mineral acid,

(f) A base which is not an alkali,

(g) An oxide which is a base,

(h) A hydrogen containing compound which is not an acid,

(i) A base which does not contain a metal ion.

Q. What is the difference between
(a) an alkali and base?
(b) an alkali and a metal hydroxide?

(b) Choose the correct answer from the choices (A), (B), (C) and (D):
(i) The property which is characteristic of an electrovalent compound is that:
(A) it is easily vaporized
(B) it has a high melting point
(C) it is a weak electrolyte
(D) it often exists as a liquid
(ii) When a metal atom becomes an ion:
(A) it loses electrons and is oxidized
(B) it gains electrons and is reduced
(C) it gains electrons and is oxidized
(D) it loses electrons and is reduced
(iii) Which of the following hydroxides is not an alkali?
(A) ammonium hydroxide
(B) calcium hydroxide
(C) copper hydroxide
(D) sodium hydroxide

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.

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Q2. Select the correct word from the list in the brackets for each of the following statements:An example of a base which is not an alkali is ___________. [caustic potash, copper hydroxide, ammonium hydroxide]

Copper hydroxide is hydrated copper oxide, and it does provide some concentration of OH-ions when it is in the presence of acids (H3O+). However, it is largely insoluble in water. Hence, Copper Hydroxide is the example of the base which is not an alkali.

Q2. Select the correct word from the list in the brackets for each of the following statements:
An example of a base which is not an alkali is ___________. [caustic potash, copper hydroxide, ammonium hydroxide]

Copper hydroxide is hydrated copper oxide, and it does provide some concentration of ${OH}^{-}$ ions when it is in the presence of acids ( $H_{3} O^{+}$ ). However, it is largely insoluble in water.
Hence, Copper Hydroxide is the example of the base which is not an alkali.