A. higher melting point then molecular crystals
B. lower melting point then molecular crystals
C. discrete molecules linked by Van der waals forces
D. hydrogen bonding
Submitted by: Mansoor Ul Haque
Author: Mansoor-Ul-Haque
A. increase inter-molecular interactions
B. increasing potential energy of molecules
C. increasing kinetic energy of molecules
D. decreasing surface tension
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A. petrol molecules do not have any hydrogen bond
B. petrol is an organic compound
C. water molecules have small size
D. petrol molecules have greater size
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A. hydrogen bonding
B. irregular shape of the molecules
C. irregular shape of the molecules and strong inter-molecular forces
D. greater molecular size
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A. Ice
B. Diamond
C. Sucrose
D. Plastic
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A. ionic substances
B. metallic substances
C. molecular solids
D. covalent network solids
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A. Sea water
B. Brass
C. Tape water
D. Graphite
E. Sand
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A. smallest indivisible particle in an element
B. smallest particle of an element which can undergo a chemical reaction
C. building block of an element
D. always smaller than molecule
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A. Precision and accuracy should go side by side in a scientific work
B. Scientific work must be precise, accuracy is not essential
C. Scientific work must be accurate, precision is not essential
D. Calculations must be made before any experiment
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A. 2.5
B. 2.0
C. 1.75
D. 1.5
E. 1.25
Submitted by: Mansoor Ul Haque
