100% FREE ACCESS9th Standard Syllabus & Materials
9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -கற்கண்டு (இலக்கணம்) - தொடர் இலக்கணம், ஆகுபெயர் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -விரிவானம் (துணைப்பாடம்) - தாய்மைக்கு வறட்சி இல்லை! Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -கவிதை பேழை (செய்யுள்) - மார்கழி பெருவிழா Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உயிருக்கு வேர்-இலக்கணம் - பகுபத உறுப்பிலக்கணம் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil அமுதென்று பேர் - இலக்கணம்-எழுத்து -அளபெடை Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil அமுதென்று பேர்-துணைப்பாடம் - ஆறாம்திணை Important Questions And Answers Study Material - QB365 Set A
Published on: 19/09/2019
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Download Tamil Nadu 9th 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.
You must have seen brass statues in museums and places of worship. Brass is an alloy made up of approx.30% zinc and 70% copper. Is Brass a pure substance or a mixture or compound?
2.
Is air a pure substance or Mixture? Justify.
3.
The most appropriate labelling of X and Y in a filtration set up are
| X | Y | |
| (a) | precipitate | solvent |
| (b) | solvent | solute |
| (c) | residue | filtrate |
| (d) | filtrate | residue |
4.
What produces more severe burns, boiling water or steam? Why?
5.
'Shake well before use'. This is the instruction on a bottle of medicine. What kind of a mixture is contained in the bottle? Give reason.
6.
You have just won a medal made of 22-carat gold. Have you just procured a pure substance or impure substance?
7.
Name the method you would adopt to separate a mixture of ammonium chloride and common salt.
8.
A few drops of ‘Dettol’ when added to water the mixture turns turbid. Why?
9.
Define Sublimation.
10.
How gaseous pressure arises?
1.
Brass is not a pure substance. It is a mixture.
2.
Air is a mixture, because samples from different places give different percentage of its components.
3.
residue - filtrate.
4.
Steam produces more burns than boiling water because the latent heat of fusion of steam is greater than water.
5.
An emulsion is a special type of mixture made by combining two liquids that normally don't mix. The process of turning a liquid mixture into an emulsion is called emulsification.
6.
22-carat is not a pure gold because for making ornaments 22-carat gold is used which contains 22 parts of gold and 2 part of copper by weight.
7.
Sublimation.
8.
Dettol diffuse water. So the water turns turbid.
9.
Certain solids change directly to gas without passing through the liquid state. The direct change of a solid to gas is called sublimation.
Example: dry ice, naphthalene, iodine.
10.
Since the particles in gases are far apart there is a lot of space between them. Therefore they can be forced to get closer or compressed when the volume decreases the pressure increases.
9th Standard Syllabus & Materials
9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - திருக்குறள் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - மணிமேகலை Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - ஏறு தழுவுதல் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உயிருக்கு வேர் - தண்ணீர் Important Questions And Answers Study Material - QB365 Set A
Tamilnadu Stateboard 9th Standard Subjects
Tamilnadu Stateboard Standards
