DIAGNOSTIC TEST

GOVT. GIRLS H.S.S, CHERTHALA

DIAGNOSTIC TEST- FEBRUARY 2017

Subject :-  Chemistry                                                                                         std :VIII

      unit :- water                                                                                    Time: No time limit

 Section - A

1)  All substance dissolve in water due to

           ( neutral solvent, universal solvent, surface tension, heat capacity)

2)  Water in which soap gives lather

           ( soft water, hard water, heavy water, salt water)

3)  Liquid drop has the shape of 

            ( sphere, circle, goal, no shape)

4)  water get polluted due to he absence of

             (H2, O2, Mg, CO2)

5)  Amount of water in plant & animal body

             ( 13%, 65%, 50%, 90%)

Section - B

1) Boiling point of water is _______________

2) Temperature at which water boils in pressure cooker is_______________

3)  Freezing point of water is _____________________

4)  Ratio of hydrogen & oxygen in water is _____________

5) When water become ice, volume increase and density ______________

Section - C

1) pressure                             -     decomposition of hydrogen and oxygen

2) rain drop                            -     120

3) freezing point                      -     neutral solvent

4) hoffmann water volitmeter   -     surface tension

5) water                                  -     0

Section - D

1) Permanent hardness can be removed by boiling\

2) In water ice sink

3) Acid can be used in radiator to regulate heat in automobile engine

4) Nickel sulphate dissolve in water has no colour

5) Evapotation is the process by which a liquid changes to vapour

Section - E 

1) Ability of water to hold more amount od heat

2) Temperature at which liquid changes to solid

3) Nature of pure water has neither the property of acid nor that of alkali

4) Characteristic of water that can dissolve various substance

5) Type of hardness that can be removed by boiling