By losing one or two electrons the atoms of metal are
1.oxidised
2.reduced
3.hydrogenated
4.sublimated
The list which contains only elements is
1.air, water, oxygen
2.hydrogen, oxygen, brass
3.air, water, fire, earth
4.calcium, sulphur, carbon
The smallest part of an element that cannot exist as a free state is
1.ion
2.charge
3.atom
4.molecule
Which of the following is very high for proton?
1.radius
2.ionization potential
3.charge
4.hydration energy
A reactant containing the element that is oxidised is called
1.reducing agent
2.oxidising agent
3.hydrogen
4.sublime
Electrolytes conduct electricity in
1.solid state
2.liquid state
3.gaseous state
4.plasma state
 Electrolysis of brine produces
1.chlorine gas
2.hydrogen gas
3.sodium hydroxide
4.all the above
Loss of hydrogen atoms by an element is called
1.hydrogenation
2.oxidation
3.reduction
4.sublimation
O-O-H bond angle in H2O2 is
1.97°
2.106°
3.120°
4.109°28′
The electrolyte among the following is
1.NaOH
2.Urea
3.glucose
4.benzene