Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
Which of the following sets comprises physical changes?
Shredding of paper, baking a cake, bursting of crackers
Boiling of water, cooking of food, rusting of iron
Burning of paper, setting of milk into curd, breaking a glass
Breaking of glass, grinding wheat, boiling of water
The changes that occur in a compound without changing its chemical composition is called physical changes. Which of the following is true regarding the physical changes?
Physical changes can not be reversed
Physical changes can not occur by heating or cooling the substance
No new product is formed in physical changes
No change of state of matter
Which of the following statement(s) is/are true?
A. All physical changes are reversible
B. All chemical changes are irreversible
Only A
Only B
Both A and B
Neither A nor B
Identify the correct set.
Set Physical Changes Chemical Changes
A Ozone formation from Oxygen, Condensation Rusting, Burning of candle
B Evaporation, Alloy formation Rusting, Curd formation
C Condensation, Evaporation Combustion, Galvanization
D Galvanization, Alloy formation Crystallization, Condensation
A
B
C
D
The method used to separate the components from the mixture of camphor and salt is
Crystallisation
Chromatography
Fractional distillation
Sublimation
Identify which of the following are chemical change(s)
(A) Tarnishing of a silver cup
(B) Sublimation of naphthalene balls
(C) Electrolysis of water
(D) Condensation of steam
(E) Drawing wire from aluminum
A, B
C, D
A, C
B, D
Which is a chemical change?
Evaporation of water
Corrosion of Iron
Melting of Ice
Mixture of sugar and sand
Which of the following is NOT an example of chemical change?
Changing of water to water vapour
Digestion of food in our body
Rusting of iron
Milk changing to curd
Which of the following is/are the example/examples of chemical change?
1. Crystallization of sodium chloride
2. Melting of ice
3. Souring of milk
Select the correct answer using the code given below.
1 and 2 only
3 only
1, 2 and 3
None
Which process takes place when we heat a solution of alum and then let the filtrate cool?
Magnetic separation
None of these
