Question paper of achivement test

Achivement was conducted on GGHSS Cherthala, in class VIII E on 30/2/2017. The test was on chapter water of chemistry.

GOVT. GIRLS H.S.S, CHERTHALA

ACHIVEMENT TEST- JANUARY 2017

CHEMISTRY

Std:VIII                                                     Marks:25

                                                              Time:40 min

                                              SECTION - A                                                 (1×5=5)

FILL IN THE BLANKS

1. Boiling piont of water is______
2. Temperature at which water boils in pressure cooker is_______
3. Freezing point of water is _______
4. When water become ice volume increases and density _______
5. Ratio of hydrogen and oxygen in water is ______

                                                       SECTION - B                                                           (5×2= 10)

SHORT ANSWER

1.Ammu says that soap can remove dirt from the fabric. Do you agree with this? Why?

2.Mix copper sulphate and water in a beaker

a) What is your observation?

b)What is the reason of the colour change?

3. Distilled water can’t turn litmus paper blue to red or red to blue. Why?

4. Water is called universal solvent. What are the demerits of this?

5. Provide excess food for fish on aquarium is a threat to its survival. Justify

                                                         SECTION - C                                                        (2×5 = 10)

ESSAY

1. Surface tension tends to minimise the surface area of a liquid. Suggest an experiment to prove this [follow the pattern:- equipments required, procedure, result]
2. “ Water is presious, we must conserve it.” What are the measures we can do to conserve water?

________