9th Chemistry Chapter5 Physical States of Matter

Sr #	Questions	A	B	C	D
1	one atomspheric pressure is qual to how many pascals ?	101325	10325	106075	10523
2	Which one of the following does not affect the bioling point ?	intermoleculare forces	external pressure	nature of liquid	initial temperature of liquid
3	The following table shows the melting and boiling points of four substances. Which substance is a solid at room temperature ?	-186oC Melting point -183oC Boiling point	-6oC Melting point 120 Boiling point	0oC Melting point 100 oC Boiling point	36 oC Melting point 130 oC Boling point
4	How many times are thee liquids denser than gases?	100 times	1000 times	10,000 times	100,000 times
5	A mixture of the above gasses at -210oC was heated by 20oC. Which of the element will still be in the liquid state ?	Oxygen only	Argon, oxygen and xenon	Argon, nitrogen and xenon	Xenon only
6	Which one of the following gas diffuses fstest ?	hydrogen	helium	fluorine chlorine	chlorine
7	Acetone has characteristic fragrant odour and is used to make finger nail polish. It melts at -94 oC and boils at 56oC . What is the physical state of acetone at 25oC and 1 atm.?	gas	Liquid	solid	cannot be predicated
8	Which one of he following is not amorphous ?	rubber	plastic	glass	glucose
9	A liquid boils when its vapour pressure becomes equal to	760 cm Hg	1Pa	101.325KPa	0.1atm
10	Water normally boils at 100oC , but it is possible to boil water at room temperature. What variable would you have to change to do this ?	increase external pressure	decrease external pressure	decrease temperature	none of these
11	The constant factor in Bolyle’s law is :	volume	pressure	temperature	mole
12	Bromine has a melting point of -7oC and a boiling point of 59oC. What is the physical state of bromine at 100oC ?	gas	liquid	solid	cannot be predicted
13	Which is not the property of crystalline solids?	have well defined shape	have orderly arrangements of particles	have repeating three dimensional arrangement of particles	are generally soft
14	In which of the following processes speed of the particles decreases?	Melting	boiling	sublimation	condensation
15	Gases are the lightest form of matter and their densities are expressed in terms of :	mg cm^-3	g cm^-3	g dm^-3	kg dm^-3
16	The vapour pressure of liquid increases with the :	increase of pressure	increase of temperature	increase of intermolecular forces	increase of polarity of molecules
17	Which one of the following coexists in dynamic equilbrium at freezing point:	gas and solid	liquid and gas	liquid and solid	all of these
18	Which one of he following motions are possessed solid particles ?	rotational motions	vibrational motions	translational motions	both translational and vibrational motions
19	The boiling points of some element are given below:	Argon ------------> -186oC	Nitrogen ------------> -196oC	Oxygen ---------------> -183oC	Xenon --------------> -108oC
20	SI unit of presssure is :	Nm^-2	N^-2m	N-1m^2	Nm
21	Which statement about the particles of a solid in not correct?	They move at great speeds	They are arranged in regular patterns.	There is very little space between the particles,	The forces of attraction between the particles are strong.
22	Density of a gas increases, when its :	temperature is increased	pressure is increased	volume is kept constant	none of these