2021 NABTEB CHEMISTRY Answers

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1a)
i)Atom can neither be created nor destroyed,furthermore, Atoms cannot be divided into smaller particles
ii)All matter is made up of tiny ,indivisible particles called atoms
iii)Atoms of different elements may contains with each other in a fixed ,simple ratio to form compound atoms.
iv)Atoms of the same elements are similar in shape and mass but differ from atoms of the other elements.
v)Atom is the smallest unit of mattee that can take part in chemical Reaction and still Retains it’s chemical properties after reaction.

1b)
i)Filtration
ii)Liquid
iii)distillation

1c)
i)
-Helium
-Neon

ii)
-Mercury

iii)
-Hydrogen H2
-oxygen O2

1c)
Empirical formular of a compound is the simplest whole number ratio of atoms of each element in the compound.its determined using Data from experiments.

1e)
i) loading…
ii) loading…

iii)
-make sulphur dioxide
-converts the sulphur dioxide into sulphur trioxode(the irresible reaction of the heart of the process)
-Convert Sulphur trioxide into Cone sulphuric acid

 

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