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WorksheetsPart VI Microscopic World II
Total questions: 20
Worksheet time: 25mins
In which of the following molecules are all of its atoms arranged on the same plane?
A. Methane
B. Ammonia
C. Phosphorus pentafluoride
D. Carbon dioxide
Which of the following bonds is the most polar?
A. C–N
B. C–O
C. C–F
D. O–F
In which of the following pairs do the molecules have a similar shape?
A. CO2 and SO2
B. CCl4 and SiF4
C. BF3 and NH3
D. O2 and O3
Which of the following gives the correct order of boiling points of NH3, HCl, HF and H2O?
A. NH3 < HCl < HF < H2O
B. NH3 < H2O < HCl < HF
C. HCl < NH3 < H2O < HF
D. HCl < NH3 < HF < H2O
The electronic arrangements of elements X and Y are shown in the table above.
X reacts with Y to form compound Z. What is the shape of Z?
A. Linear
B. Trigonal planar
C. Tetrahedral
D. Octahedral
Which of the following does NOT happen when ice is melting?
A. The open structure of ice collapses.
B. The hydrogen bonds among water molecules are weakened.
C. The number of covalent bonds in ice remains unchanged.
D. The density of ice decreases.
Which of the following statements concerning compounds J and K is correct?
A. J has a higher boiling point because it has a greater area of contact with one another.
B. K has a higher boiling point because it has a greater area of contact with one another.
C. J has a higher boiling point because it has a higher molecular polarity.
D. K has a higher boiling point because it has a higher molecular polarity.
A CNCl molecule has an octet structure. What is the shape of it?
A. Linear
B. V-shaped
C. Trigonal planar
D. Tetrahedral
Which of the following molecules has a non-octet structure?
A. CH2=CH2
B. ClF3
C. H2O2
D. PCl3
The three-dimensional structure of an SF4 molecule is shown above.
Which of the following combinations about the SF4 molecule is correct?
Which of the following statements about H2O and CH3CH2OH is INCORRECT?
A. Both of them are polar substances.
B. Both of them can form hydrogen bonds with ethanoic acid.
C. They are miscible with each other.
D. The solid state of both substances have an open structure.
Which of the following substances exists as molecular crystals under room conditions?
A. Iodine
B. Neon
C. Silicon
D. Methane
Which of the following combinations is INCORRECT?
The structural formula of ethane-1,2-diol is shown above.
What is the maximum number of water molecules that can form hydrogen bonds with an ethane-1,2-diol molecule at the same time?
A. 2
B. 4
C. 6
D. 8
The three-dimensional structure of XeF4 is shown above.
Which of the following statements about XeF4 is/are correct?
(1) It has an octet structure.
(2) It has a planar structure.
(3) It is polar in nature.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
Which of the following statements concerning ice is/are correct?
(1) Each water molecule forms four hydrogen bonds with its neighbouring molecules in ice.
(2) Molecules are more closely packed in ice than in liquid water.
(3) Water molecules are arranged in a hexagonal shape in ice.
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
Which of the following molecules is/are polar?
(1) BF3
(2) NH3
(3) PCl3
A. (1) only
B. (2) only
C. (1) and (3) only
D. (2) and (3) only
Which of the following jets of liquid will deflect towards a negatively charged rod?
(1) Benzene
(2) Dichloromethane
(3) Ethanol
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Which of the following statements about an NOF molecule are correct?
(1) It is polar in nature.
(2) Its central atom has one lone pair of electrons.
(3) It is V-shaped.
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
Which of the following attractive forces are present in CH3F?
(1) Covalent bonds
(2) Van der Waals’ forces
(3) Hydrogen bonds
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3)
