Question

EXERCISES
Use Cordova Smart Class Software
smart board in class to do these exe
A
1.
Tick (/) the correct options:
In which of the following processes, a new substance is formed?
(a) melting O (b) sublimation 0 (c) evaporation O (
(d) rusting
2. In galvanisation, iron objects are coated with
metal.
(a) aluminium
0 ()
(b) zinc
O (c) copper
(d) silver
3. Temporary and reversible changes are generally
changes.
(a) physical O (b) irreversible 0 (c) chemical O (d) mechanical
4. Which of the following is not a chemical change?
(a) formation of curd
(b) spoilage of food
(c) hammering of metal
(d) digestion of food
5. Magnesium ribbon burns with
light to form a white powder.
(a) white
O (b)red
0 (c) blue O (d) green
6. Which of the following substances will be formed when magnesium ribbon burns in air?
(a) magnesium carbonate
(b)magnesium bicarbonate
(c)magnesium hydroxide
(d) magnesium oxide
Fill in the blanks:​

Answer 1

Answer:

I don't know if you have any