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Question-1
With which one of the following elements should silicon be doped so as to give p - type of semiconductor?
(A)
Germanium
(B)
Arsenic
(C)
Selenium
(D)
Boron
Question-2
In a closed flask of 5 L, 1.0 g of H
2
is heated from 300 to 600 K. Which statement is not correct?
(A)
Pressure of the gas increases
(B)
The rate of collision increases
(C)
The number of moles of gas increases
(D)
The energy of gaseous molecules increases
Question-3
At which condition does Vander waals' real gas, act as an ideal gas?
(A)
High temperature, low pressure
(B)
Low temperature, high pressure
(C)
High temperature, high pressure
(D)
Low temperature, low pressure
Question-4
If a gas expands at constant temperature, it indicates that:
(A)
Kinetic energy of molecules decrease
(B)
Pressure of the gas increases
(C)
Kinetic energy of molecules remains the same
(D)
Number of the molecules of gas increase
Question-5
Zn converts from its melted state to its solid state. It has HCP structure. Then find out the number of nearest atoms.
(A)
6
(B)
8
(C)
12
(D)
4
Question-6
The number of atoms contained in a fcc unit cell of a mono atomic substance is:
(A)
1
(B)
2
(C)
4
(D)
6
Question-7
On doping Ge metal with a little of In or Ga, one gets:
(A)
p - type semiconductor
(B)
Insulator
(C)
n - type semiconductor
(D)
Rectifier
Question-8
In a face centred cubic lattice, a unit cell is shared equally by how many unit cells?
(A)
8
(B)
4
(C)
2
(D)
6
Question-9
In the fluorite structure, the coordination number of Ca
2+
ion is :
(A)
4
(B)
6
(C)
8
(D)
3
Question-10
A liquid can exist only:
(A)
Between triple point and critical temperature.
(B)
At any temperature above the melting point.
(C)
Between melting point and critical temperature.
(D)
Between boiling and melting temperature.
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Cambridge Secondary Grade 9
IGCSE
Practice in Related Chapters
Nature of Matter
Elements and Compounds
Acid,Base and Salts
Quantitative Chemistry
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Patterns and properties of Metals
Planet Earth
Introducing Chemistry
Mixtures and Separating Techniques
Particle Theory
Periodic Patterns
Chemical Change
Chemical Analysis and Experimentation
Patterns and Properties of Non-metals
Petrochemicals and Polymers
Industrial Inorganic Chemistry
Organic Chemistry
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