CLASS IX
Qualitative questions
Q1.
The most abundant element in the earth crust is
iron
oxygen
silicon
Aluminium
Q2
Which of the following properties is generally not shown by metals?
Ductility
Sonorous
Dullness
Electrical conduction
Q3.
An alloy is
a compound
a heterogeneous mixture
a homogeneous mixture
an element
Q4.
Alloys are homogeneous mixtures of a metal with a metal or non-metal. Which among
the following alloys contain non-metal as one of its constituents?
Amalgam
Brass
Bronze
Steel
Q5.
Black gold' is another name for
coal
coke
charcoal
petroleum
Q6.
An example of a triatomic molecule is ___________.

Ozone

Nitrogen

Carbon monoxide

Hydrogen
Quantitative Questions
Q1.
The value of Avogadro constant is ___________.
1. 6.022 x 10 24
2. 6.022 x 10
22
3. 60.22 x 10
23
4. 6.022 x 10
23
Q2.
1. Atomic number
2. Atomic mass
3. Atomic mass scale
4. Number of electrons
Q3.
Atomic mass of calcium is 40. The mass of 2.5 gram atoms of calcium is _______.
1. 40 g
2. 2.5 g
3. 100 g
4. 80 g
Q4.
One mole of H2O corresponds to
1. 22.4 litre at 1 atm and 250C
2. 6.02 x 1023 atoms of hydrogen and 6.02 x 1023 atoms of oxygen
3. 18 g
4. 1 g
Q5.
The number of molecules in 4.25 g of ammonia is approximately
1. 1.0 x 1023
2. 1.5 x 1023
3. 2.0 x 1023
4. 3.5 x 10
23
Q6.
How many moles of CO2 are present in 220 mg?
(a) 5 moles
(b) 0.005 mole
(c) 5000 moles
(d) 10 moles
Quantitative Passage based
Weigh 100g of soil and place it on a newspaper in the sun ,to dry,for about 2 hours .The care is taken so
as not to spill any soil outside the newspaper.After drying it , the soil is again weighed. Let the weight of
dry soil be Xg.
Q1.
Define the term soil moisture?
a)
b)
c)
d)
Q2.
How much was the soil moisture present in the sample of soil ?
a)
b)
c)
d)
Q3.
Soil holds water in it which is called soil moisture.
The loss of weight of soil on drying is called soil moisture.
The initial weight of soil is called soil moisture.
The final weight of soil is called soil moisture.
100g
Xg
(1oo-Xg)
None of these
What is the % of moisture in this sample of soil ?
a)
b)
c)
d)
X%
(100-X ) %
!00/X %
x/100 %
Qualitative Passage based
Take a small quantity of copper sulphate crystals from your school laboratoryand dissolve it ijn asmall
quantity of water to obtain blue coloured solution. Add afew drops of dilute sulphuric acid . Now put 3-5
medium sized iron nails in it. After sometime the colour of blue solution changes to green and brown
deposit appears on iron nails
1. The colour change from blue to green represents
a) Physical Change
b) Chemical change
c) Both of above
2. The green colour of solution ids due to formation of
a) Copper sulphate
b) Copper metal
c) Iron sulphate
3. The brown deposit on iron nails is due to
a) Iron on nails
b) Copper on nails
c) Iron sulphate on nails
d) Copper sulphate on nails