Question

1. The colour of vapours formed on sublimation of iodine solid is
(a) Purple (violet) (b) Colourless (c) Yellow (d) Orange
2. Under which of the following conditions we can boil water at room temperature?
(a) At low pressure (b) At high pressure
(c) At very high pressure (d) At atmospheric pressure
3. Which of the following is not endothermic process?
(a) Fusion (b) Vapourisation
(c) Temperature (d) Insoluble heavy impurities
4) At higher altitudes:
(a)Boiling point of a liquid decreases (b)Boiling point of a liquid increases
(c)No change in boiling point (d)Melting point of solid increases
5) The boiling point of alcohol is 78ºC. What is this temperature in Kelvin scale:
(a)373 K (b)351 K (c)375 K (d)78 K
6) The change of a liquid into vapor is called:
(a)Vaporization (b)Solidification (c)Sublimation (d)None of these
7) Which of these choices will not change the state of matter?
(a)Temperature (b)Crushing a crystal
(c)Pressure (d)Heat

Answer 1

Answer:

here are your answers please mark my answer the brainliest one

1. @purple

2.at low pressure

3.insoluble heavy impurities

4.boiling point of liquid decreases

5.351k

6. Vaporisation

7.Crushing a crystal

Answer 2

Answer:

1. purple ( violet )

2. low pressure

3. insoluble heavy impurities

4. Boiling point of water decreases

5. 351 K

6. Vaporisation

7. Crushing a crystal