8th Standard Syllabus & Materials
8th Standard
TN 8th Tamil இயல் 3 - கல்வி கரையில - வினைமுற்று Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
TN 8th Tamil இயல் 2 - ஈடில்லா இயற்கை - மயங்கொலிகள் Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
TN 8th Tamil இயல் 2 - ஈடில்லா இயற்கை -பட்டமரம் Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
TN 8th Tamil இயல் 2 - ஈடில்லா இயற்கை - இயற்கையை போற்றுவோம் Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
TN 8th Tamil இயல் 1 - தமிழ் இன்பம் - ஆழிக்கு இணை Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
TN 8th Tamil இயல் 2-ஈடில்லா இயற்கை - திருக்குறள் Important Questions And Answers Study Material - QB365 Set A
Published on: 13/05/2022
QB365 provides detailed and simple solution for every Book back Questions in class 8 Science Subject. It will helps to get more idea about question pattern in every book back questions with solution.
latest Book back QuestionsDownload Tamil Nadu 8th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
Mention the uses for the following compounds.
a) Baking soda b) Bleaching powder c) quick lime
2.
Mention any four compounds and their uses.
3.
Name the elements for following symbols.
a) Na b) W c) Ba d) Al e) U
4.
Why are utensils made up of aluminium and brass?
5.
Tabulate four points of difference between metals and non-metals.
1.
| Compound | Uses | |
|---|---|---|
| a | Baking Soda (Sodium bicarbonate) |
Fire extinguisher, preparation of baking powder, preparation of cakes and bread |
| b | Bleaching powder (Calcium Oxychloride) | At Bleaching agent, disinfectant sterilisation of drinking water. |
| c | Quick lime (Calcium Oxide) | Manufacture of cement and glass. |
2.
a) Washing Soda: As cleaning agent in soap and softening of hardwater.
b) Table Salt: Essential component of our daily diet, preservative for meat and fish.
c) Slaked Lime: White washing of walls
d) Sugar : Preparation of sweets toffees and fruit juices.
3.
| Symbol | Name | |
| a | Na | Sodium |
| b | W | Tungsten |
| c | Ba | Barium |
| d | Al | Aluminium |
| e | U | Uranium |
4.
The cooking utensils are made up of aluminium and brass because they are good conductors of heat and they possess high melting point.
5.
| S.No | Property | Metal | Non - metal |
| 1 | Malleability | Good | Poor - usually soft or brittle |
| 2 | Ductility | Good | Poor - usually soft or brittle |
| 3 | Melting point | usually high | usually low |
| 4 | Conductivity (Thermal and electrical) | Good | Very poor |
8th Standard Syllabus & Materials
8th Standard
TN 8th Tamil இயல் 3 - கல்வி கரையில - பாடறிந்து ஒழுகுதல் Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
TN 8th Tamil இயல் 3-கல்வி கரையில - பல்துறைக் கல்வி Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
TN 8th Tamil இயல் 3-கல்வி கரையில - புத்தியைத் தீட்டு Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
TN 8th Tamil இயல் 2 - ஈடில்லா இயற்கை - தமிழர் மருத்துவம் ( நேர்காணல்) Important Questions And Answers Study Material - QB365 Set A
Tamilnadu Stateboard 8th Standard Subjects
Tamilnadu Stateboard Standards
