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section a
section b
section c
section d
section e
100
electrons,protons,neutrons
What are sub-atomic mass?
100
14-6=8 electron
how many neutrons are present 14/6C?
100
ionisation of gases
cathode rays are formed by?
100
7
Halogens have_ valence electrons.
100
Tungsten
name the element which is used in filaments of electric bulbs.
200
It is the number of times on atom is heavier than 1/12th mass of 1 atom of c-12.
what is the relative atomic mass?
200
nuclear reactors
u-235 is used in?
200
rutherford's model of atom
The stability of atom could not be explained by?
200
four
What is the valency of C and Si?
200
methane
What is the major component in CNG?
300
number of atom in a molecule.
What is atomicity?
300
agricultural research
What is the use of p-32?
300
bohr
" electron revolve in well defined levels" was given by?
300
they are monoatomic
What is the atomicity of He,Ne and Ar?
300
Iodine
Deficiency of which non-metal leads to goitre?
400
gold
name the element which as a latin name called aurum?
400
sodium
name a metal stored in kerosene oil?
400
cathode rays
in which of the rays e/m ratio is constant?
400
unified mass (u)
What is the unit of relative atomic mass?
400
Ammonia gas
which gas is observed in uncleaned public toilets?
500
blue
What is the colour of copper sulphate?
500
positively charged helium nuclei
What are a-rays?
500
gold
which metal is bombarded with a-rays?
500
marble (CaCO3)
Taj mahal is made of up of?
500
Bleaching powder
Which chemical is used for sterilizing or disinfecting drinking water?