Question

uwy liystallization
iii) Fermentation of grapes
iv) Digestion of food
d) What happens when hydrogen sulphide gas is passed through aqueous
solution of copper sulphate solution?
e) Pb+CuCl2->PbCl2+Cu is an example of ------- reaction
19. Read the following and answer any 4 questions:
Circuits consisting of just one battery and one load resistance are very
simple to analyze, but they are not often found in practical applications.
Usually, we find circuits where more than two components are connected
together in different combinations. These combinations of resistors put
the limit on the current that flow through the circuit. After performing
the experiments using two different types of circuit arrangements, the​

Answer 1

Explanation:

Yes,fermentation of grapes is a chemical as the yeast which are responsible for the fermentation digests the sugar in grapes in order to form alcohol.uwy liystallization

iii) Fermentation of grapes

iv) Digestion of food

d) What happens when hydrogen sulphide gas is passed through aqueous

solution of copper sulphate solution?

e) Pb+CuCl2->PbCl2+Cu is an example of ------- reaction

19. Read the following and answer any 4 questions:

Circuits consisting of just one battery and one load resistance are very

simple to analyze, but they are not often found in practical applications.

Usually, we find circuits where more than two components are connected

together in different combinations. These combinations of resistors put

the limit on the current that flow through the circuit. After performing

the experiments using two different types of circuit arrangements, the

Answer 2

Explanation:

d)When hydrogen sulphide gas is passed through a blue solution of copper sulphate, a black precipitate of copper sulphide is obtained and the sulphuric acid so formed remains in the solution.

e)Displacement reaction.

19th question I can't understand. Try by yourself in searching ur book

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