Q.1
The substances whose compositions are not uniform and different components are mixed are called _______
  • a) Homogenous substances
  • b) Heterogeneous substances
  • c) Pure substances
  • d) Elements
Q.2
A ________ is made up of two or more pure substances which may be in any ratio.
  • a) Mixture
  • b) Element
  • c) Molecule
  • d) Atom
Q.3
Matter can be divided into two types i.e. mixture and pure substance.
  • a) True
  • b) False
Q.4
Which of the following is not a pure substance?
  • a) Copper
  • b) Gold
  • c) Sugar solution
  • d) Water
Q.5
What are pure substances classified as?
  • a) Elements and Atoms
  • b) Molecules and Compounds
  • c) Elements and Compounds
  • d) Atoms and Molecules
Q.6
When two or more atoms of different elements combine with each other in a fixed ratio, the molecule of a ____ is obtained.
  • a) Compound
  • b) Element
  • c) Atom
  • d) Ion
Q.7
Compounds cannot be separated by chemical methods.
  • a) True
  • b) False
Q.8
Point out an example of a compound.
  • a) Sugar solution
  • b) Hydrogen
  • c) Ammonia
  • d) Sodium
Q.9
Which among the three states of matter has a definite shape and size?
  • a) Solids
  • b) Liquids
  • c) Gases
  • d) Vapor
Q.10
Water is a/an _______
  • a) Element
  • b) Compound
  • c) Pure substance
  • d) Mixture
0 h : 0 m : 1 s