100% FREE ACCESS8th 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: 11/12/2020
8th Standard Science Changes Around Us English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021
Download 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.
The brown colour of a cut apple is due to
rusting
rancidity
browning
fermentation
2.
Enzymes and yeasts are called
catalysts
bio catalysts
chemical catalysts
physical catalysts
3.
The chemical reactions carried out by the passage of electricity is called.
Rusting
Thermolysis
Electrolysis
Photolysis
4.
Decomposition of limestone is an example for chemical reaction based on __________
contact
electricity
light
heat
5.
Rusting of iron is a _________ change.
physical
chemical
physical and chemical
neutral
6.
______ is responsible for Global warming.
Carbon di oxide
methane
chlorofluoro carbons
all the above
7.
In Haber’s process of producing ammonia ______ is used as a catalyst.
Nitrogen
hydrogen
iron
nickel
8.
Limestone contains ______ mainly.
Calcium chloride
calcium carbonate
calcium nitrate
calcium sulphate
9.
The pigment responsible for browning of apples is______.
Hydrated iron (II) oxide
melanin
starch
ozone
10.
The burning of matchstick is an example for chemical reaction based on______
Contact in physical states
electricity
light
catalyst
1.
(c)
browning
2.
(b)
bio catalysts
3.
(c)
Electrolysis
4.
(d)
heat
5.
(b)
chemical
6.
(d)
all the above
7.
(c)
iron
8.
(b)
calcium carbonate
9.
(b)
melanin
10.
(a)
Contact in physical states
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
