Name: Combustible and Non-combustible Substance
Uploaded: 2019-07-19
Duration: 4 min 31 s
Description: How do you differentiate between a combustible and non-combustible substance? Check this video for a simple activity to distinguish between these two substan...

Question

Match the following:

Column I	Column II
(i) Interchange of radicals	(a) Direct combination
(ii) Combination of only elements	(b) Neutralisation
(iii) Combination of elements and compounds	(c) Double decomposition
(iv) Reaction for the formation of soluble salts	(d) Precipitation
(v) Reaction for the formation of insoluble salts	(e) Synthesis

Accepted Answer

(i) Double decomposition is a reaction in which two compounds in a solution react to form two new compounds by the interchange of radicals.

(ii) Synthesis reaction is the combination reaction in which two or more elements which combine to form a single product.

(iii) Direct combination reaction is the combination of two or more elements or compounds to form a new single product which is always a compound with new properties.

(iv) Neutralisation is a reaction in which acids react with bases to form soluble salt and water as the products.

(v) Precipitation is the reaction which involves the combination of two soluble salts in their solution form to give insoluble compounds in the form of precipitates.

Column I Column II

(i) Interchange of radicals (c) Double Decomposition

(ii) Combination of only elements (e) Synthesis

(iii) Combination of elements and compounds (a) Direct combination

(iv) Reaction for the formation of soluble salts (b) Neutralisation

(v) Reaction for the formation of insoluble salts (d) Precipitation

Important Questions on Chemical Changes and Reactions

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