8th Standard Syllabus & Materials
8th Standard
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NEW8th Standard
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NEW8th Standard
Tamilnadu 8th Standard роХрогро┐родроорпН роОрогрпНроХро│рпН Important Questions And Answers Study Material - QB365 Set A
NEW8th Standard
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NEW8th Standard
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NEW8th Standard
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Published on: 11/12/2020
8th Standard Science Atomic Structure English Medium Free Online Test 1 Mark Questions 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.
In all atoms of an element
the atomic and the mass number are same.
the mass number is same and the atomic number is different
the atomic number is same and the mass number is different
both atomic and mass numbers may vary.
2.
Which of the following statements made by Dalton has not undergone any change?
Atoms cannot be broken.
Atoms combine in small, whole numbers to form compounds.
Elements are made up of atoms.
All atoms of an elements are alike
3.
In water, hydrogen and oxygen are combined in the ratio of _______by mass.
1:8
8:1
2:3
1:3
4.
Cathode rays are made up of
neutral particles
positively charged particles
negatively charged particles
None of the above
5.
The same proportion of carbon and oxygen in the carbon dioxide obtained from different sources proves the law of __________
reciprocal proportion
definite proportion
multiple proportion
conservation of mass
1.
(c)
the atomic number is same and the mass number is different
2.
(d)
All atoms of an elements are alike
3.
(a)
1:8
4.
(c)
negatively charged particles
5.
(b)
definite proportion
8th Standard Syllabus & Materials
8th Standard
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NEW8th Standard
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NEW8th Standard
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NEW8th Standard
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Tamilnadu Stateboard 8th Standard Subjects
Tamilnadu Stateboard Standards
