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The presence of which of the following salts in water causes
corrosion in steam boilers?
1 Sodium chloride
2 Magnesium chloride
3 Calcium bicarbonate
4 Potassium bicarbonate
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Papepr is manufactured by 1 Wod and resin 2 Wood, sodium and bleaching powder 3 Wood and bleaching powder 4 Wood, calcium, hydrogen sulphite and resin
What is the Cellular Structure ?
what are the advantages and disadvantages of empirical knowledge?
Which are the important pulsating nebulae?
Which is the regulatory authority of atomic energy in india?
The neutral atom’s two isotopes differ in the number of 1 Electron shells 2 Protons 3 Valence electrons 4 Neutrons
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
iS ELEMENT IRON RADIOACTIVE AND WHY?
In an atomic nucleus, neutrons and protons are held together by 1 Gravitational forces 2 Magnetic forces 3 Exchange force 4 Coulombic forces
Science as a social endeavor .Explain
0 Answers Mahatma Gandhi University,
Brass is an alloy of 1 Nickel and copper 2 Zinc and copper 3 Nickel and zinc 4 Nickel and silver
Which of the following metals can displace zinc from a solution of zinc sulphate? 1 Lead 2 Magnesium 3 Iron 4 Mercury
Biological Sciences 
