Chemistry 11 Chapter 1
Basic concepts
Test 13
1.
Atomic theory was first developed by?
a) John Dalton
b) Berzellius
c) Bohr
d) Democritus
2.
Masses of atom ranges from?
a) None of these
b) 10
-27
to 10
-25
c) 10
-25
to 10
-23
d) 10
-23
to 10
-20
3.
Hemoglobin molecule is made up of________atoms?
a) 30000
b) 20000
c) 10000
d) 40000
4.
Atomic masses were determined by?
a) J.Berzellius
b) John Dalton
c) Democritus
d) Bohr
5.
Ordinary optical microscope can measure upto?
a) 300nm
b) 400nm
c) 600nm
d) 500nm
6.
Number of particles thought tot be exist in an atom?
a) None of these
b) Less than 100
c) 100
d) More than 100
7.
1 amu = __________?
a) 9.472×10
-27
kg
b) 1.661×10
-27
kg
c) None of these
d) 6.667×10
-27
kg
8.
1nm=______?
a) 10
-3
b) 10
-7
c) 10
-9
d) 10
-5
9.
Word “Atom” was first called by?
a) Democritus
b) Berzellius
c) Bohr
d) John Dalton
10.
Diameter of an atom is?
a) 0.1nm
b) 0.4nm
c) 0.3nm
d) 0.2nm
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