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Which one of the following is the petroleum wax?
1 Bees wax
2 Carnauba wax
3 Paraffin wax
4 Jojoba wax
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Which scientist made detailed study on novae?
how is rrb model question paper for science junior engineer gr.II
why is it important that sex cells have half the number of Chromosomes as body cells?
Which of the following metals was first discovered by man? 1 Bronze 2 Silver 3 Iron 4 Copper
Which is the research reactors of bhabha atomic research centre?
Ozone attacks 1 Mercury and silver 2 Copper 3 Silver and iron 4 None of these
the river tigris in which city
Polythene is industrially prepared by the polymerization of 1 Methane 2 Styrene 3 Acetylene 4 Ethylene
3 Answers Amna Industries, HFI,
In an atomic nucleus, neutrons and protons are held together by 1 Gravitational forces 2 Magnetic forces 3 Exchange force 4 Coulombic forces
What is the Respiration ?
When was the first american rocket launched?
Water is neither acidic nor alkaline because 1 It cannot accept or donate protons 2 It boils at a high temperature 3 It can dissociate into equal number of hydrogen ions 4 It cannot donate or accept electrons
Biological Sciences 
