2017-2018
Basic Education High School, Kan
Grade 10 , Chemistry, July C.E.T Time Allowed (45) minutes
- Write True or False for the following statements. ( 5 marks)
(a) Freezing of water to ice is a chemical change.
(b) Rusting of iron is a physical change.
(c) Some elements are not made by man in the laboratory.
(d) Milk is a homogeneous mixture.
(e) Table salt is a hydrate. - Fill in the blanks with a suitable word or words. ( 5 marks )
(a) Calcium oxide is an example of ………… substance.
(b) If the solvent is water, the solution formed is called an ……….. solution.
(c) All metals except mercury are ……….. at ordinary temperature.
(d) Some metal oxide and all ………. are base.
(e) Heat is absorbed when ……… melts into water.
3.Match each of the items given in list A with the appropriate item given in the list B.(5marks)
List A List B
(a) Melting of ice (i) a physical change
(b) Burning of wood (ii) a chemical change
(c) Sugar being dissolve in water (iii) energy is evolved
(d) Rusting of iron (iv) a new substance is formed
(e) Heating of the filament in an (v)
electric bulb
4.Write down five differences between mixture and compound. (10 marks)
2017-2018
Basic Education High School, Kan
Grade 10 , Chemistry, July C.E.T ,Time Allowed (45) minutes
- Write True or False for the following statements. ( 5 marks)
(a) Freezing of water to ice is a chemical change.
(b) Rusting of iron is a physical change.
(c) Some elements are not made by man in the laboratory.
(d) Milk is a homogeneous mixture.
(e) Table salt is a hydrate. - Fill in the blanks with a suitable word or words. ( 5 marks )
(a) Calcium oxide is an example of ………… substance.
(b) If the solvent is water, the solution formed is called an ……….. solution.
(c) All metals except mercury are ……….. at ordinary temperature.
(d) Some metal oxide and all ………. are base.
(e) Heat is absorbed when ……… melts into water.
3.Match each of the items given in list A with the appropriate item given in the list B.(5marks)
List A List B
(a) Melting of ice (i) a physical change
(b) Burning of wood (ii) a chemical change
(c) Sugar being dissolve in water (iii) energy is evolved
(d) Rusting of iron (iv) a new substance is formed
(e) Heating of the filament in an (v)
electric bulb
4.Write down five differences between mixture and compound. (10 marks)