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Biological Sciences
50
Modern Materials
21
Atomic Structure
87
Energy Resources
43
Elements and Substances
76
Plant Photosynthesis and Respiration
52
Space and Solar System
230
General Science for Class 6
1155
General Science for Class 7
2197
General Science for Class 8
0
Basics of Electricity
28
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Atoms and Atom Model
Scientists name isotopes by putting
atomic number after the element name
mass number after the element name
atomic number before the element name
mass number before the element name
Author:
rikazzz
Comment
Electric Circuits and Currents
ELCB is also switched off if
faulty earth wire has been used
faulty equipment has been used
faulty switches have been used
two pin plugs have been used
Author:
rikazzz
Comment
Atoms and Atom Model
The electronic configuration of sodium as K, L, M is
2, 1, 8
8, 1, 2
1, 2, 8
2, 8, 1
Author:
rikazzz
Comment
Elements and Compounds
When iron and sulphur are mixed together at room temperature there is lack of
reaction
production of new product
mixed reaction
both a and b
Author:
rikazzz
Comment
Electric Circuits and Currents
Kites and fishing rods should not be used near
houses
power lines
airports
parks
Author:
rikazzz
Comment
Mixtures
Air is a mixture of
elements
compounds
gases
molecules
Author:
rikazzz
Comment
Investigating Space
At night every star we see in the sky takes light from
Moon
Earth
Sun
Milky way
Author:
rikazzz
Comment
Human Transport System
The vessel which takes the blood from heart to lungs, is known as
renal artery
pulmonary artery
renal vein
pulmonary vein
Author:
rikazzz
Comment
Atoms and Atom Model
Ion with positive charge is known as
cation
anion
positron
negatron
Author:
rikazzz
Comment
Dispersion of Light
The angle between the normal ray and the ray leaving a medium is known as
critical angle
angle of incidence
angle of reflection
angle of refraction
Author:
rikazzz
Comment
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