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Answers
Answer:
A-1 Detergent gives lather with hard and soft water both, while a soap gives lather with soft water only. Thus, it not possible to check if water is hard by using a detergent.
A-2 The two properties of carbon which lead to the huge number of carbon compounds we see around us are Catenation and Tetravalence. Explanation: It can form a 'covalent bond' by combining with other carbon.
A-3 A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.
Properties of covalent compound:-
1)Covalent compounds are usually liquids or gases. Only some of them are solids.
2)Covalent compounds have usually low melting and low boiling point. 3)Covalent compounds are usually insoluble in water but they are soluble in organic solvents.
4)They do not conduct electricity.
Explanation:
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