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Chapter 11 - Heat and Thermodynamics - 9
1.
A mixture that consists of only one phase is known as?
a) solution
b) homogenous mixture
c) heterogenous mixture
d) compound
2.
Which one of the following is a heterogenous mixture?
a) salt dissolved in water
b) oil floating on water
c) sugar mixed in water
d) none of these
3.
A mixture that contains two or more visibly different components is known as?
a) solution
b) heterogenous mixture
c) homogenous mixture
d) solvent
4.
Atomic number of an atom represents the number of ___ in its nucleus?
a) protons and electrons
b) protons and neutrons
c) protons
d) neutrons and electrons
5.
How many protons are there in the nucleus of hydrogen atom which has the atomic number as 1?
a) one
b) three
c) two
d) four
6.
The total number of protons and neutrons in an atom is known as?
a) atomic num
b) mass number
c) isotope number
d) avogadro's number
7.
The atomic number of Helium is?
a) 4
b) 3
c) 2
d) 1
8.
Isotopes are the atoms of an element that have different number of?
a) none of these
b) protons
c) neutrons
d) electrons
9.
People who eat a lot of garlic have a lower chance of getting?
a) stroke
b) stomach cancer
c) all of these
d) heart diseases
10.
The mass number of carbon atom is?
a) 12
b) 1
c) 2
d) 6
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