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Both the crown and root of a tooth is co...

Both the crown and root of a tooth is covered by a layer of bony hard substance called

A

Enamel

B

Dentine

C

Bony socket

D

Cement

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Metals get attacked by substances around it such as moisture, acids, etc. Metal is said to 'corrode' due to this attack and the process is called corrosion. Many metals like iron, copper, silver, etc. get corroded. When iron is exposed to moist air, it undergoes corrosion and a reddish brown coloured solid layer is formed on its surface. Corrosion of iron, which is known as rusting, is a serious problem as enormous amount of money is spent every year to replace damaged iron. Similarly, copper reacts with moisture and. CO_(2) in air to form a green coloured coating of basic copper carbonate on its surface. Silver acquires a black colour when exposed to air containing H_(2)S due to the formation of silver sulphide on its surface. Based on the above paragraph, answer the following question. Give the chemical formula of rust.

Metals get attacked by substances around it such as moisture, acids, etc. Metal is said to 'corrode' due to this attack and the process is called corrosion. Many metals like iron, copper, silver, etc. get corroded. When iron is exposed to moist air, it undergoes corrosion and a reddish brown coloured solid layer is formed on its surface. Corrosion of iron, which is known as rusting, is a serious problem as enormous amount of money is spent every year to replace damaged iron. Similarly, copper reacts with moisture and. CO_(2) in air to form a green coloured coating of basic copper carbonate on its surface. Silver acquires a black colour when exposed to air containing H_(2)S due to the formation of silver sulphide on its surface. Based on the above paragraph, answer the following question. What happens to silver ornaments if they are exposed to air containing H_(2)S gas?

Metals get attacked by substances around it such as moisture, acids, etc. Metal is said to 'corrode' due to this attack and the process is called corrosion. Many metals like iron, copper, silver, etc. get corroded. When iron is exposed to moist air, it undergoes corrosion and a reddish brown coloured solid layer is formed on its surface. Corrosion of iron, which is known as rusting, is a serious problem as enormous amount of money is spent every year to replace damaged iron. Similarly, copper reacts with moisture and. CO_(2) in air to form a green coloured coating of basic copper carbonate on its surface. Silver acquires a black colour when exposed to air containing H_(2)S due to the formation of silver sulphide on its surface. Based on the above paragraph, answer the following question. Do gold ornaments corrode? Justify.

Metals get attacked by substances around it such as moisture, acids, etc. Metal is said to 'corrode' due to this attack and the process is called corrosion. Many metals like iron, copper, silver, etc. get corroded. When iron is exposed to moist air, it undergoes corrosion and a reddish brown coloured solid layer is formed on its surface. Corrosion of iron, which is known as rusting, is a serious problem as enormous amount of money is spent every year to replace damaged iron. Similarly, copper reacts with moisture and. CO_(2) in air to form a green coloured coating of basic copper carbonate on its surface. Silver acquires a black colour when exposed to air containing H_(2)S due to the formation of silver sulphide on its surface. Based on the above paragraph, answer the following question. What is rust?

Metals get attacked by substances around it such as moisture, acids, etc. Metal is said to 'corrode' due to this attack and the process is called corrosion. Many metals like iron, copper, silver, etc. get corroded. When iron is exposed to moist air, it undergoes corrosion and a reddish brown coloured solid layer is formed on its surface. Corrosion of iron, which is known as rusting, is a serious problem as enormous amount of money is spent every year to replace damaged iron. Similarly, copper reacts with moisture and. CO_(2) in air to form a green coloured coating of basic copper carbonate on its surface. Silver acquires a black colour when exposed to air containing H_(2)S due to the formation of silver sulphide on its surface. Based on the above paragraph, answer the following question. Why do we apply paint on iron articles?

When the root is swollen in the middle and tapers at both ends, it will be called as………….. .

Name the following The protective layers present in the space between the delicate central nervous system and its bony covering.

NIKITA PUBLICATION -HUMAN NUTRITION -Example
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  2. What is nutrition?

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  3. Enlist the processes that provide us energy to perform different activ...

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  4. Our diet includes all necessary nutrients still we need to digest it w...

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  5. What will be the dental formula of a three year old child?

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  6. What is dental caries and dental plaque? How can one avoid it?

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  7. Who control the deglutition.

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  8. Is deglutition voluntary or involuntary?

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  9. What is heart burn? Why do we take antacids to control it?

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  10. You must have heard about appendictis. It is inflammation at appendix.

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  11. Draw a neat labelled diagram of human alimentary canal and associate g...

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  12. Write a note on human dentition.

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  13. Liver is a vital organ. Justify.

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  14. Muscularis layer in stomach is thicker than that in intestine. Why it ...

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  15. How can I keep my pancreas healthy. Can a person live without pancreas...

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  16. Make a flow chart for digestion of carbohydrate.

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  17. What is a proenzyme? Enlist various proenzymes involved in process of ...

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  18. Differentiate between chyme and chyle.

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  19. Digestion of fats take place only after the food reaches small intesti...

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  20. What is the important of balanced diet for body?

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  21. Are jaundice and hepatitis same disorders?

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