NIOS X Science & Technology Chapter 27 MCQ's

The first Classification of periodic table is

• Solid, Liquid & gas

• Metal & Non-metal

• Halogen & Noble gas

Diamond is a _______ conductor whereas copper is a _______ conductor.

• poor, good

• Better, poor

• good, bad

What process or reaction is this?

• Galvanization

• Rusting

• Corrosion

Choose or select the increasing order of reactivity.

• Ag<Cu<Pb<Na

• Ag<Na<Pb<Pb

• Na<Ag<Pb<Cu

Galvanization is the process of coating _____ metal on Iron objects

• Aluminium

• Silicon

• Zinc

Chemical formula of Dinitrogen Pentaxoide

• N2O3

• N5O2

• N2O5

Oxide id Non-metal reacts with water to produce

• Acid

• Salt

• Base

Gold, silver always exits in ____ state

• Free state

• Native state

• Combined state

Match the Column A with Column B

• a)-iii), b)-i), c)-ii), d)-iv)

• a)-ii), b)-ii), c)-iii), d)-iv)

• a)-iv), b)-iii), c)-ii), d)-i)

Roasting is heating in _____

• Presence of carbon dioxide

• Absence of carbon dioxide

• Presence of oxygen