Question

Tick() the correct options:
In which of the following processes, a new substance is formed?
(a) melting
(b) sublimation (c) evaporation (d) rusting
2. In galvanisation, iron objects are coated with
metal.
(a) aluminium
(b) zinc
(c) copper
(d) silver
3. Temporary and reversible changes are generally
changes,
(a) physical
(b) irreversible (c) chemical (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 (b) red
(c) blue (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
​

Answer 1

Answer:

rusting

copper

physical

hammering of metal

green

magnesium oxide

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Answer 2

Answer:

1. D
2. B
3. A
4. C
5. A

6. D

if any answer is incorrect I am sorry....