Practice Nature of matter and composition - general science mcq Online Quiz (set-2) For All Competitive Exams
Q-1) Who among the following is called 'The father of modern chemistry?
(a)
(b)
(c)
(d)
Q-2) The oxide of which of the following elements is used as a coolant?
(a)
(b)
(c)
(d)
Q-3) Which one is a sublime substance?
(a)
(b)
(c)
(d)
Q-4) What happens when a fixed amount of oxygen gas is taken in a cylinder and compressed at constant temperature?- Number of collisions of oxygen molecules at per unit area of the wall of the cylinder increase.
- Oxygen ($O_2$) gets converted into ozone ($O_3$).
- Kinetic energy of the molecules of oxygen gas increases.
(a)
(b)
(c)
(d)
Q-5) The latest discovered state of matter is
(a)
(b)
(c)
(d)
Q-6) Two substances A and B when brought together form a substance C with the evolution of heat. The properties of C are entirely different from those of A and B. The substance C is
(a)
(b)
(c)
(d)
C is a compund which is formed as a result of reaction between A and B.
Q-7) On passing through a colloidal solution, the beam of light gets ..........
(a)
(b)
(c)
(d)
This is due to Tyndall effect.
Q-8) A sample contains two substances and has uniform properties. The sample is
(a)
(b)
(c)
(d)
Homogeneous mixture is a solution having uniform composition and properties throughout.
Q-9) Which of the following is a compound ?
(a)
(b)
(c)
(d)
Hydrogen sulphide (H2 S) is a compound of hydrogen and sulphur.
Stainless steel and bronze are alloys whereas graphite is an allotropic form of the element carbon.
Q-10) Which one of the following is not a mixture?
(a)
(b)
(c)
(d)
Q-11) Select the one that is a chemical change.
(a)
(b)
(c)
(d)
Chemical changes are irrerversible in nature.
Q-12) Select the one that is a physical change.
(a)
(b)
(c)
(d)
Each of the process given in options are irreversible and involve change in chemical properties hence all are chemical changes.
Q-13) Solubility is a good separation technique for
(a)
(b)
(c)
(d)
Different salts have different solubility in a particular solvent. Thus on this basis mixture of different salts can be separated.
Q-14) The phenomenon of radioactivity was invented by
(a)
(b)
(c)
(d)
Q-15) Which of the following is an example of a heterogeneous substance?
(a)
(b)
(c)
(d)
Candle is a heterogeneous mixture of wax and thread. Copper is element while bottled water and table salt are compounds.
Q-16) Vermicompost is an/a
(a)
(b)
(c)
(d)
Q-17) When we put some crystals of potassium permanganate in a beaker containing water, we observe that after sometime whole water has turned pink. This is due to
(a)
(b)
(c)
(d)
Q-18) What type of mixture is smoke?
(a)
(b)
(c)
(d)
Q-19) A mixture of ethanol and water can be separated by
(a)
(b)
(c)
(d)
Mixture of ethanol and water can be separated by fractional distillation as they have different boiling points.
Q-20) In which one of the following situations a chemical reaction does not occur?
(a)
(b)
(c)
(d)