QQuestion
Salts can be prepared by the action of dilute acid on:
1. bases
2. carbonates
3. metals
4. sulphites
The method which cannot be used for the preparation of copper salts is:
(a) 1
(b) 2
(c) 3
(d) 4
✓Answer
(c) 3
Explanation –
Copper lies below hydrogen in the activity series, so it does not displace hydrogen from dilute acids. Hence, copper salts cannot be prepared by the action of dilute acids on the metal copper.
However, copper salts can be prepared from copper bases like Cu(OH)2, copper carbonate (CuCO3), and copper sulphite by the action of dilute acid.
Related Questions
More ICSE Easy level questions
The indicator which changes to pink colour in an alkaline solution is: (a) Blue Litmus (b) Methyl Orange (c) Red Litmus (d) Phenolphthalein
The acid which does not form acid salt by a basic radical: (a) H2CO3 (b) H3PO4 (c) H2SO4 (d) CH3COOH
The metal hydroxide which reacts with both acids and alkalis to form salt and water is: (a) Calcium hydroxide (b) Magnesium hydroxide (c) Aluminium hydroxide (d) Ferric hydroxide
State whether the following statements are True or False: (a) Organic compounds having different molecular formula, but same structural formula are called isomers. (b) A salt is a compound formed by partial or complete replacement of the hydrogen ion of an acid by a metal or electropositive ion.
K, L and M are beakers containing three different solutions as shown below. Name the beaker which: (a) contains only ions. (b) contains only molecules. (c) has pH less than 7.
Give reasons why: (a) Hydrochloric acid cannot form an acid salt. (b) Electronegativity increases across a period.
Given below are some chemicals. Lead nitrate, Copper, Hydrochloric acid, Lead oxide, Iron, Sodium carbonate, Copper carbonate, Chlorine Using suitable chemicals from the box given above, write balanced chemical equations for the preparation of the following salts. (Note: The chemicals may be used more than once, if needed.) (a) Lead (II) carbonate (b) Copper (II) chloride (c) Iron (II) chloride
Differentiate between the following pairs based on the criteria given in the bracket: (a) Acetic acid and Sulphuric acid (number of replaceable hydrogen ion per molecule) (b) Electrolyte and Metallic conductor (the particles conducting electricity)
Fill in the blanks with the choices given in the brackets: (a) Metals are good ............... [oxidizing agents /reducing agents] (b) Non-polar covalent compounds are ............... [good / bad] conductors of heat and electricity. (c) Higher the pH value of a solution, the more is ............... [acidic / alkaline] it is. (d) ............... [Silver chloride / Lead chloride] is a white precipitate that is soluble in excess of Ammonium hydroxide solution. (e) Conversion of ethene to ethane is an example of ............... . [hydration / hydrogenation]
Which pair of reactants can be best used to produce lead (II) sulphate? (a) Sulphuric acid + Lead (b) Sulphuric acid + Lead hydroxide (c) Sodium sulphate + Lead nitrate (d) Potassium sulphate + Lead oxide
Convert the following reactions into a balanced chemical equation: (a) Ammonia to nitric oxide using oxygen and platinum catalyst. (b) Sodium hydroxide to sodium sulphate using sulphuric acid. (c) Ferrous sulphide to hydrogen sulphide using hydrochloric acid.
Differentiate between the following pairs based on the criteria given in the brackets: (a) Cane sugar and hydrated copper sulphate [using concentrated H2SO4] (b) Sulphuric acid and hydrochloric acid [type of salts formed]