Question

rigidity, etc. are the physical properties. The interconversion of states is a physical change
because these changes occur without a change in composition and no change in the chemical
ity?
?
nature of the substance.
i. The boiling point of oxygen is
a. -180°C
b. -180°C
C. -170°C
d. -130°C
ii.
is a process that separates a pure solid in the form of its crystals from a solution.
a. Simple evaporation
b. Crystallisation
c. Distillation
d. None of these
iii. Which of the following are physical changes?
I. Melting of iron metal
II. Rusting of iron
III. Bending of an iron rod
IV. Drawing a wire of iron metal
a. (I), (II) and (III)
b. (1), (II) and (IV)
c. (I), (III) and (IV)
d. (II), (III) and (IV)
iv. Which of the following methods would you use to separate cream from milk?
a. Fractional distillation
b. Distillation
c. Centrifugation
d. Filtration
v. Which of the following are chemical changes?
I. Decaying of wood
II. Burning of wood
III. Sawing of wood
IV. Hammering of a nail into a piece of wood
a. (I) and (II)
b. (II) and (III)
C. (III) and (IV)
d. (I) and (IV)​

Answer 1

Answer:

1 = a,b both have 180°C but it is not - minus

2 - crystallization

3- c

4-c

5-a

thanks