Question

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Answer 1

Answer:

TRUE AND FALSE

1. TRUE

2. TRUE

3. FALSE

4. TRUE

5.  TRUE

FUNCTION OF THE FOLLOWING:

1.Electrolysis is a process by which electrical energy is used to produce a chemical change. Perhaps the most familiar example of electrolysis is the decomposition (breakdown) of water into hydrogen and oxygen by means of an electric current. The same process can be used to decompose compounds other than water.

2.In our daily lives we come across so many situations in which we have to separate some substances from a mixture in order to get a suitable substance for use. Some of the substances are easily separable just by taking out the impurities with hand. This method of separation is known as handpicking.

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Answer 2

Answer:

True or False-:

1. True

2.True

3. False

4. True

5. True

Function of the terms-:

1. Electrolysis=> Electrolysis is used in industry for the production of many metals and non-metals (e.g., aluminium, magnesium, chlorine, and fluorine). Electrolysis is commonly employed for coating one metal with another. The method of coating one metal with another using an electric current is called electroplating.

2. Handpicking=> Separating rotten vegetables from basket of vegetables. Separating the stones and insects from rice. Separating green grapes from black grapes.

Separating red gram from rice.

Fill in the blanks-;

1. Basalt

2. nucleus(protons) & electrons

3. oxygen atom & silicon atoms

4. Henry Mosley

5. 78%

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