9th 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: 22/09/2018
Second Revision Test
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.
What is data processing?
2.
How will you separate a mixture containing saw dust, naphthalene and iron filings?
3.
A sound is heard 5 s later than the lightning is seen in the sky on a rainy day. Find the distance of location of lightning? Given the speed of sound = 346 ms-1
4.
____________is the fundamental quantity.
Length
Area
Volume
Density
5.
Force involved in uniform circular motion is given by _____________.
f = mv2/r
f = mvr
f = mr2/v
f = v2/r
6.
The focal length of a concave mirror is 5cm. Its radius of curvature is
5 cm
10 cm
2.5 cm
7.
The number of protons, neutrons and electrons present respectively in \(_{ 35 }^{ 80 }{ Br }\)
80, 80, 35
35, 55, 80
35, 35, 80
35, 45, 35
8.
For a simple distillation process we need to have
an evaporating dish
a separating funnel
a filter with filter paper
a Liebig condenser
9.
Describe the characteristic features of different Prochordates with suitable diagrams.
10.
Calculate the diameter of the sphere which is shown in the Figure. Assume the scale has no zero error.
11.
Hydrogen sulphide (H2S) contains 94.11% sulphur, water (H2O) contains 11.11% hydrogen and sulphur dioxide (SO2) contains 50% of oxygen. Show that the results are in agreement with the law of reciprocal proportions
12.
ISI mark is mandatory to certify agricultural products
13.
When an object is at the centre of curvature of concave mirror the image formed will be virtual and erect.
14.
Smaller the size of the orbit, lower is the energy of the orbit
15.
Oil and water are immiscible in each other
16.
Name some Natural Preservatives.
17.
Convert: 104°F into Celsius scale.
18.
Dehydration is based on the principle of removal of ____________.
19.
The ratio of sine of the angle of incidence to the sine of _________ is a constant
20.
Calcium and Argon are examples of a pair of __________
21.
Chromatography is based on the principle of ______.
22.
Consider an object is rest at position x = 20m. Then its displacement – time graph will be straight line to _____________ the axis.
23.
Echinodermata
24.
Charles Babbage
25.
Iron
26.
Thomson
27.
Shoots growing towards the light
1.
The data processing in a computer is collecting data and converting it into information according to our needs and requirements.
2.
First separate the iron filings by magnetic separation and then napthalene separated by sublimation method. After separated saw dust retain the china dish.
3.
\(speed=\frac { Distance\quad }{ Time } \)
Distance = speed × time = 346 × 5 = 1730m
Thus, the distance of location of lightning = 1730m
4.
(a)
Length
5.
(a)
f = mv2/r
6.
(b)
10 cm
7.
(d)
35, 45, 35
8.
(a)
an evaporating dish
9.
The prochordates are considered as the forerunners of vertebrates. They are classified into Hemichordata, cephalochordata and urochordata.
Hemichordata:
Hemichordata are marine organisms without back bone. They mostly remain as tubiculous forms. The body is soft, vermiform, unsegmented, bilaterally symmetrical and triploplastic.
Eg: Balanoglossus
Cephalochordata:
Cephalochordates are small fish like marine chordates with unpaired dorsal fins. The notochord extends throughout the entire length of the body.
Eg: Amphioxus
Urochordata:
The adults are mostly degenerate and are sessile forms. The body is enveloped by a tunic or test.
Eg: Asicidian
10.
The diameter (D) of the sphere = Main scale reading (MSR) + (Vernier scale coincidence (VC) × least count (LC)) ± ZE. In this case the zero of the vernier scale is right after the main scale reading 1.1. So the main scale reading is 1.1 cm. The vernier scale coincidence is 7. The least count is 0.01 cm. The diameter of the sphere = 1.1 cm + (7 × 0.01 cm)‒0 = 1.1 + 0.07 = 1.17 cm.
11.
In 100g of water, the weight of hydrogen = 11.11 g
The weight of oxygen = 100 – 11.11 = 88.89 g
In 100g of sulphur dioxide, the weight of sulphur = 50 g
Weight of oxygen = 100 – 50 = 50 g
The ratio between the weight of oxygen and Hydrogen is 88.89:11.11 i.e. 8:1 ..... (1)
In hydrogen sulphide, the weight of sulphur = 94.11 g
The weight of hydrogen = 100 – 94.11 = 5.89 g
The ratio between the weight of sulphur and hydrogen is 94.11: 5.89 ie. 16: 1 ..... (2)
The two ratios 1 and 2 are related as 8/1: 16/1 (or) 1: 2
These are simple multiples of each other. The ratio between the weight of sulphur (32) and oxygen (16) which combine separately with the weight of Hydrogen (2) supports the law of reciprocal proportions
12.
(b)
13.
(b)
14.
(a)
15.
(a)
16.
Salt sugar and oil.
17.
Celsius = (F – 32) × \(\frac{5}{9}\)= (104 - 32) ×\(\frac{5}{9}\) = 72 × \(\frac{5}{9}\) = 40°C.
18.
( )
water/ moisture content
19.
( )
Infraction
20.
( )
isobars
21.
( )
absorption and adsorption
22.
( )
Parallel to
23.
Starfish
24.
Father of computer
25.
Anaemia
26.
Plum pudding model
27.
Positive phototropism.
9th Standard Syllabus & Materials
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Tamilnadu Stateboard 9th Standard Subjects
Tamilnadu Stateboard Standards
