Online test of Chapter 3 Atoms and Molecules 1 Science| Class 9th
Questions:
1. The formula of a chloride of a metal M is MCl3, the formula of the phosphate of metal M will be
(a) MPO4
(b) M2PO4
(c) M3PO4
(d) M2(PO4)3
2. The ratio of H:O by mass in hydrogen peroxide (H2O2) is
(a) 16 : 1
(b) 1 : 8
(c) 1 : 32
(d) 1 : 16
3. Which has the largest number of molecules?
(a) 54 g of N2O5
(b) 28 g of CO2
(c) 36 g of H2O
(d) 46 g of C2H5OH
4. The molecular formu
Online test of Chapter 1 Matter in our Surrounding 3 Science| Class 9th
Questions :
1. The boiling points of the liquids decrease in the following order:
B.P of water > B.P of kerosene > B.P of alcohol > B.P of petrol.
Which of the following order is correct for decreasing rate of evaporation?
(a) water > alcohol = kerosene > petrol
(b) petrol > alcohol > kerosene > water
(c) remains same in all liquids
(d) water > kerosene >
Online Test of Chapter 1 Matter in our Surrounding 2 Science| Class 9th
Questions :
1. Which of the following substances exhibit the strongest intermolecular forces of attraction?
a. water(l)
b. ethanol(l)
c. CO2(g)
d. sugar(s)
2. Which condition out of the following increase the evaporation of water?
(a) Increase in temperature of water
(b)Decrease in temperature of water
(c) Adding common salt to water
(d)Less exposed surface area of water
3. The inte
Online test of Chapter 1 Matter in our Surrounding 1 Science| Class 9th
Questions :
1. During evaporation, particles of a liquid change to vapours only:
(a) from the surface
(b) from the bulk
(c) from both surface and bulk
(d) neither from surface nor from bulk
2. Which of the following statements is incorrect?
(a) Matter is made up of particles
(b) Matter is continuous in nature
(c) Particles of matter are always in state of motion
(d) Particles of matt
Online Test of Chapter 2 Is Matter Around us Pure 3 Science| Class 9th
Questions :
1. The properties of mixture are _______ from its components.
(a) similar
(b) slightly different
(c) entirely different
(d) different
2. The smell of hydrogen sulphide (HS) gas is
(a) pleasant
(b) of rotten eggs
(c) of burning sulphur
(d) None of these
3. Water is a compound because its
(a) composition is fixed
(b) properties are different from its components
(c) componen
Online Test of Chapter 2 Is Matter Around us Pure 2 Science| Class 9th
Questions :
1. An example of a liquid metal and a liquid non-metal is
(a) gallium, mercury
(b) mercury, chlorine
(c) mercury, bromine
(d) bromine, sulphur
2. Which out of the following is a heterogeneous mixture?
(a) air
(b) brass
(c) iodised table salt
(d) steel
3. Brass is an example of a
(a) homogeneous compound
(b) homogeneous mixture
(c) heterogeneous mixture
(d) heterogeneous c
Online Test of Chapter 2 Is Matter Around us Pure 1 Science| Class 9th
Questions:
1. After heating common salt and ammonium chloride for a few minutes, we can observe the following on the upper part of the inverted funnel:
(a) reddish brown deposit.
(b) water droplets
(c) a white solid deposit
(d) a yellow gas
2. Which of the following is a metalloid?
(a) Germanium
(b) Gallium
(c) Carbon
(d) Sodium
3. Who was the first person to use the term element?
(a
Online Test of Chapter 3 Atoms and Molecules 3 Science| Class 9th Science
Questions :
1. The percentage of water of crystallisation in CuSO4.5H2O is
(a) 36.07
(b) 72.14
(c) 9.02
(d) 56.15
2. Which has the maximum number of atoms?
(a) 108 g of Ag
(b) 56 g of Fe
(c) 27 g of Al
(d) 24 g of 12C
3. 8 g of O2 has the same number of molecules as
(a) 22 g of CO2
(b) 7 g of CO
(c) 14 g of CO
(d) 28 g of CO
4. A sample of pure water, irrespective of source, cont
MCQ Online Test 2 of Chapter 3 Atoms and Molecules 2 Science| Class 9th Science
Questions :
1. The mass percentage of hydrogen (H) in water is
(a) 11.11
(b) 1.11
(c) 88.88
(d) 8.88
2. The ratio of H:O by mass in water is
(a) 1 : 8
(b) 8 : 1
(c) 2 : 1
(d) 1 : 2
3. The indivisibility of atom was proposed by
(a) de Broglie.
(b) Bohr.
(c) Rutherford.
(d) Dalton.
4. Copper reacts with oxygen to form two oxides, Cu2O and CuO. The ratio between the masses of