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
Among physical and chemical change, generally_______.
a chemical change is reversible and physical change is irreversible
both are reversible
physical change is reversible and chemical change is irreversible
Both are irreversible
Which is an example of physical change?
Metal rusting
Silver tarnishing
Water boiling
Paper burning
Which one of the following is a chemical change?
Dissolving sugar in water
Melting of ice
Crystallization
Milk turning sour
Which of the below is a physical change?
Burning a piece of wood
Conversion of milk into curd
Dissolving salt in water
Burning Wax
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
Which of the following statements is correct?
A) Chemical changes are usually irreversible
B) In a Physical change, there is always change in state
A is true and B is false
A is false and B is true
Both A and B are true
Both A and B are false
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
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
Read the following statements and choose the correct option.
Assertion (A) : Burning of a piece of paper to produce ash is an example of chemical change
Reason (R) : Burning of a piece of paper is an irreversible change
Both (A) and (R) are true and (R) is the correct explanation of (A).
Both (A) and (R) are true but (R) is not the correct explanation of (A).
(A) is true but (R) is false.
(R) is true but (A) is false.
The example of physical change is _______________.
Galvanization
Calcination
Roasting
Electrolytic refining
