# Properties of Matter Test 19

Student’s Name:____________Admission No.______Roll No._____Section:______
Paper: Physics      Class: 9                     Time Allowed:    One Hour                           Marks: 25

Q1. Circle the correct answer.  (10)

1.The pressure of a gas in a container depends upon:
a) temperature                       b) type of a gas

c) volume of container          d) shape of container
2.The S.I unit of density is
a) liter             b) kgm-2
c) kgm-3         d) Nm
3.The molecules in gases are
a) closely packed           b) loosely packed

c) much far apart          d) none of these
4.The S.I unit of young’s modulus is:
a) Nm         b)          c) Nm2      d) all
5.The attractive forces between the molecules of solid are
a) less weak               b) very weak

c) very strong           d) none of these
6.The liquid pressure will ______ with increase in depth
a) increase           b) decrease

c) not change           d) none
7.Mass per unit volume is called
a) pressure          b) density        c) weight           d) stress
8.The density of a substance can be found with a help of :
a) Pascal’s law           b) Archimedes principle

c) hook’s law            d) principal of floatation
9.Matter is composed of very small particles called
a) electrons           b) protons          c) molecules          d) neutrons
10.What is the unit for strain?
a) no unit             b) Nm-1           c) Nm-2         d) none of these
Q2. Write short answers to these questions: (15)
1.Define the term pressure write its formula and S1 unit.
2.Why does the atmospheric pressure vary with attitude?
3.What is upthurst force.؟
4.The density of air is 1.3 kg .. Find the mass of air in a room measuring 8mx5mx4m.
5.What do you mean by young’s modulus?