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TN 9th Tamil உள்ளத்தின் சீர் -கற்கண்டு (இலக்கணம்) - தொடர் இலக்கணம், ஆகுபெயர் Important Questions And Answers Study Material - QB365 Set A
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TN 9th Tamil உள்ளத்தின் சீர் -விரிவானம் (துணைப்பாடம்) - தாய்மைக்கு வறட்சி இல்லை! Important Questions And Answers Study Material - QB365 Set A
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TN 9th Tamil உள்ளத்தின் சீர் -கவிதை பேழை (செய்யுள்) - மார்கழி பெருவிழா Important Questions And Answers Study Material - QB365 Set A
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TN 9th Tamil உயிருக்கு வேர்-இலக்கணம் - பகுபத உறுப்பிலக்கணம் Important Questions And Answers Study Material - QB365 Set A
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TN 9th Tamil அமுதென்று பேர் - இலக்கணம்-எழுத்து -அளபெடை Important Questions And Answers Study Material - QB365 Set A
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TN 9th Tamil அமுதென்று பேர்-துணைப்பாடம் - ஆறாம்திணை Important Questions And Answers Study Material - QB365 Set A
Published on: 29/07/2019
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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.
For a simple distillation process we need to have
an evaporating dish
a separating funnel
a filter with filter paper
a Liebig condenser
2.
The separation of denser particles from lighter particles done by rotation at high speed is called ________
Filtration
sedimentation
decantation
centrifugation
3.
__________ has the same properties throughout the sample
Pure substance
Mixture
Colloid
Suspension
4.
When we mix a drop of ink in water we get a__________
Heterogeneous Mixture
Homogeneous Mixture
Compound
Suspension
5.
The physical state of water at 373 K is
Solid
liquid
vapour
plasma
6.
Chromatography is used extensively in physical science
7.
Milk is an example of an emulsion of fat and curd
8.
Oil and water are immiscible in each other
9.
Buttermilk is an example of heterogeneous mixture
10.
Liquids expand more than gases on heating.
11.
All matter is made up of tiny particles and these particles are in constant motion which possess________
12.
The solubility of solid in water _______with an increase in temperature
13.
In petroleum refining, the method of separation used is _______
14.
Alcohol can be separated from water by _________________
15.
An example of a substance that sublimes is ________.
16.
Evaporation is always accompanied by______________ in temperature
17.
Is air a pure substance or Mixture? Justify.
18.
What produces more severe burns, boiling water or steam? Why?
19.
What is meant by desalination of sea water?
20.
Define a solute and a solvent
21.
A few drops of ‘Dettol’ when added to water the mixture turns turbid. Why?
22.
Define Sublimation.
23.
What is melting point?
24.
What is kinetic particle theory of matter?
25.
Differentiate between filtrate and distillate
26.
Why are gases easily compressible whereas solids are incompressible?
27.
How are homogeneous solutions different from heterogeneous solution? Explain with examples.
28.
Salt and water
29.
Sand and camphor
30.
Charcoal
31.
Suspension
32.
Element
1.
(a)
an evaporating dish
2.
(d)
centrifugation
3.
(a)
Pure substance
4.
(b)
Homogeneous Mixture
5.
(c)
vapour
6.
(b)
7.
(b)
8.
(a)
9.
(a)
10.
(b)
11.
( )
Kinetic energy
12.
( )
increases
13.
( )
Fractional distillation
14.
( )
fractional distillation
15.
( )
iodine or camphor
16.
( )
increase
17.
Air is a mixture, because samples from different places give different percentage of its components.
18.
Steam produces more burns than boiling water because the latent heat of fusion of steam is greater than water.
19.
Separation of salt from sea water to get potable water is called desalination.
20.
In a solution, the component present in lesser amount by weight is called solute and the component present in larger amount by weight is called solvent.
21.
Dettol diffuse water. So the water turns turbid.
22.
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.
23.
A substance absorbs heat energy and it melts. The temperature at which a substance melts is called as melting point.
24.
All matter is made up of tiny particles and these particles are in constant motion which possess kinetic energy.
25.
After the filtration of a solution the liquid that collected is called filtrate.
In the process of fractional distillation the clear liquid collected is called distillate.
26.
1. The particles in gases are far apart and there is a lot of space between them. So they can be forced to get closer and can easily be compressed.
2. In solids the particles are tightly packed, held together by strong attractive forces, rotate about their fixed position so solids are incompressible.
27.
| Homogeneous mixtures | Heterogeneous mixtures |
| 1. Components are uniformly mixed and it will have single phase, E.g. Alloys, salt solution, lemonade, petrol, etc |
Components are not uniformly mixed and it will have more than single phase are called suspensions. E.g. chalk in water, petrol in water, sand in water, etc. |
| 2. No boundaries of separation between the components. Has single phase. |
There are visible boundaries between the components. Have two or more distinct phases. |
| 3. Components are invisible to naked eye. | Components are visible to naked eye |
| 4. They will be in solid, liquid or in the gaseous phase | Can be a solid-liquid or solid-gas or liquid- gas or solid-solid, or liquid-liquid mixtures |
28.
Soluble - Distillation
29.
Mixture of two solids - Sublimation
30.
Adsorbent
31.
Settles down on standing
32.
Pure substance
9th Standard Syllabus & Materials
9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - திருக்குறள் Important Questions And Answers Study Material - QB365 Set A
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Tamilnadu Stateboard 9th Standard Subjects
Tamilnadu Stateboard Standards
