Which of the following acids is used for ‘etching glass’?
1 HBrO3
2 H2F2
3 HCIO4
4 HIO4
The neutral atom’s two isotopes differ in the number of 1 Electron shells 2 Protons 3 Valence electrons 4 Neutrons
what are the sociological theories apply in pakistani society?
1.how many bones are there in our human body? 2.who invented the aeroplane? 3.the full form for h2o is water 4.the name which is heavier is gold 5.name the symtom which is to cure for night blindness?
HELPS IN PROPAGATING RADIO SIGNALS
What are manufacturing capacities facilities you have?
Conversion of a substance directly from solid to vapour state is known as 1 Ionization 2 Evaporation 3 Vapourisation 4 Sublimation
Which of the following was to be discovered first in the chromo sphere of the sun? 1 Xenon 2 Helium 3 Neon 4 Krypton
What are comets?
Which of the following characteristics is not-shown by hydrogen? 1 It burns in air to form water 2 It supports combustion 3 It combines with almost all the metals forming hydrides 4 None of these
What is the Nutrition ?
what is meant by test manual?
How can we determine the no: of revolutions of earth around sun?