9 Science Atoms And Molecules Test 01
CBSE TEST PAPER-01
CLASS - IX Science (Atoms and Molecules)
1.
Atomic radius is measured in nanometers and
(a) 1nm = 10-10m
(b) 1m = 10-10nm
(c) 1m = 10-9nm
(d) 1nm = 10-9m
2.
Symbol of Iron is :- (a) Ir
(b) I
3.
Atomicity of chlorine and Argon is
(c) Fe
[1]
(d) None of these
[1]
[1]
(a) Diatomic and Monoatomic
(b) Monoatomic and Diatomic
(c) Monoatomic and Monoatomic
(d) Diatomic and Diatomic
4.
Molecular mass of water ( H 2O ) is (a) 18g
5.
State law of conservation of Mass?
[2]
6.
Define Valency? Find the Valency of oxygen and Aluminum.
[2]
7.
Calculate the molar mass of Na2SO4 and CaCO3?
[2]
8.
Write the chemical formula for
[2]
(b) 8g
(c) 33g
(d) 34g
[1]
a) Calcium Phosphate b) Magnesium Hydroxide c) Aluminum chloride.
9.
State the Postulates of Dalton Theory?
[3]
10.
Find the percentage of water of crystallization in feSO4. 7H2O.
[3]
11.
2.42g of copper gave 3.025g of a black oxide of copper, 6. 49g of a black oxide, on
[3]
reduction with hydrogen, gave 5.192g of copper. Show that these figures are in accordance with law of constant proportion?
12.
A compound was found to have the following percentage composition by mass
Zn = 22.65%, S = 11.15%, H = 4.88%, O = 61.32%. The relative molecular mass is
287g/mol. Find the molecular formula of the compound, assuming that all the hydrogen in the compound is present in water of crystallizations.
Material downloaded from http://myCBSEguide.com and http://onlineteachers.co.in
Portal for CBSE Notes, Test Papers, Sample Papers, Tips and Tricks
[3]
CLASS - IX Science (Atoms and Molecules)
1.
Atomic radius is measured in nanometers and
(a) 1nm = 10-10m
(b) 1m = 10-10nm
(c) 1m = 10-9nm
(d) 1nm = 10-9m
2.
Symbol of Iron is :- (a) Ir
(b) I
3.
Atomicity of chlorine and Argon is
(c) Fe
[1]
(d) None of these
[1]
[1]
(a) Diatomic and Monoatomic
(b) Monoatomic and Diatomic
(c) Monoatomic and Monoatomic
(d) Diatomic and Diatomic
4.
Molecular mass of water ( H 2O ) is (a) 18g
5.
State law of conservation of Mass?
[2]
6.
Define Valency? Find the Valency of oxygen and Aluminum.
[2]
7.
Calculate the molar mass of Na2SO4 and CaCO3?
[2]
8.
Write the chemical formula for
[2]
(b) 8g
(c) 33g
(d) 34g
[1]
a) Calcium Phosphate b) Magnesium Hydroxide c) Aluminum chloride.
9.
State the Postulates of Dalton Theory?
[3]
10.
Find the percentage of water of crystallization in feSO4. 7H2O.
[3]
11.
2.42g of copper gave 3.025g of a black oxide of copper, 6. 49g of a black oxide, on
[3]
reduction with hydrogen, gave 5.192g of copper. Show that these figures are in accordance with law of constant proportion?
12.
A compound was found to have the following percentage composition by mass
Zn = 22.65%, S = 11.15%, H = 4.88%, O = 61.32%. The relative molecular mass is
287g/mol. Find the molecular formula of the compound, assuming that all the hydrogen in the compound is present in water of crystallizations.
Material downloaded from http://myCBSEguide.com and http://onlineteachers.co.in
Portal for CBSE Notes, Test Papers, Sample Papers, Tips and Tricks
[3]