Class 9th science and technology ,14.
Substances in Common Use
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In anodizing aluminium article to be anodized is kept.... *
2 points
On non stick cookware the coating of...... is given. *
2 points
Which of the following statements is false. *
2 points
To make hard water soft....... is used. *
2 points
When the traditions emitted by Radioactive substances are passed through two oppositely charged plates then diviate towards negative plate. *
2 points
In artificial red colour,........ is used in high proportion. *
2 points
Which of the following substances is not Radioactive. *
2 points
To identify the defects in iron casting...... technique is used *
2 points
Anodising is done on...... articles. *
2 points
Food colours added to jams and pickles contain...... and... .. *
2 points
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