Chemistry Questions for SSC CHSL EXAM

 
Q1. __________ is an example of ionic solids.
(a) Diamond
(b) Copper
(c) Dry ice
(d) Sodium chloride

Q2. Conversion of a substance directly from solid to vapour state is known as
(a) Vaporisation
(b) Sublimation
(c) Decomposition
(d) Ionisation
Q3. Gases have
(a) A definite shape but not volume
(b) A definite volume and shape
(c) A definite volume but not shape
(d) Neither definite volume nor shape

Q4. The melting and boiling points of ionic solids are
(a) High
(b) Low
(c) Very low
(d) Of intermediate range
Q5. The two elements that exist as liquids at 25°C are
(a) Mercury and lithium
(b) Mercury and caesium
(c) Bromine and mercury
(d) Mercury and argon
Q6. The point at which the solid, liquid and gaseous forms of a substance co-exist is called its
(a) Boiling point
(b) Melting point
(c) Triple point
(d) Freezing point
Q7. The so-called fourth state of matter refers to
(a) Mercury
(b) LPG
(c) Dry ice
(d) Plasma
Q8. Which of the following metals is in a liquid state at normal room temperature?
(a) Sodium
(b) Radium
(c) Gallium
(d) Silicon
Q9. Van der Waals’ equation explains the behaviour of
(a) Mixture of gases
(b) Ideal gas
(c) Real gas
(d) Water gas
                                                                                                                                   
Q10. Which of the following is a mixture?
(a) Gunpowder
(b) Iron sulphate
(c) Brass
(d) Dry ice
Q11. Air is
(a) An element
(b) A compound
(c) A mixture
(d) A colloid
Q12. Alloy steel containing chromium, to resist rusting, is known as
(a) Wrought iron
(b) Cast iron
(c) Hard steel
(d) Stainless steel
Q13. Alloys in which mercury is one of the metals are called
(a) Amalgams
(b) Emulsions
(c) Mixtures
(d) Solders
Q14. Colloids
(a) Are true solutions
(b) Are two-phase systems
(c) Contain only water soluble substances
(d) None of above
Q15. Colloids are purified by
(a) Peptisation
(b) Coagulation
(c) Condensation
(d) Dialysis
 


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