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Choose the most appropriate answer of the following:
Bonding in this molecule can be understood to involve coordinate bonding
(A) Carbon tetrachloride
(B) Hydrogen
(C) Hydrogen chloride
(D) Ammonium chloride
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Identify the anion present in the following compounds:
A salt M on treatment with concentrated sulphuric acid produces a gas which fumes in moist air and gives dense fumes with ammonia
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The following table shows the test a student performed on four different aqueous solutions which are X, Y, Z and W. Based on the observations provided, identify the cation present:
| Chemical test | Observation | Conclusion |
| To solution X, ammonium hydroxide is added in minimum quantity first and then in excess |
A dirty white precipitate is formed which dissolves in excess to form a clear solution |
(1) |
| To solution Y ammonium hydroxide is added in the minimum quantity first and then in excess |
A pale blue precipitate is formed which dissolves in excess to form a clear inky blue solution. |
(2) |
| To solution W a small quantity of sodium hydroxide solution is added and then in excess. |
A white precipitate is formed which remains insoluble. |
(3) |
| To a salt Z calcium hydroxide the solution is added and then heated. |
A pungent smelling gas turning moist red litmus paper blue is obtained. |
(4) |
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Choose the correct answer from the options given below:
A compound X consists of only molecules. Hence, X will have
A. A crystalline hard structure
B. A low melting point and low boiling point
C. An ionic bond
D. A strong force of attraction between its molecules
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Give the structural formula for 1, 2-dichloroethane
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Give a reason for Inert gases do not form ions.
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Complete the following table which relates to the homologous series of hydrocarbons.
| General formula | IUPAC name of the homologous series | Characteristic bond type | IUPAC name of the first member of the series |
| CnH2n−2 | (A) ______ | (B) ______ | (C) ______ |
| CnH2n+2 | (B) ______ | (E) ______ | (F) ______ |
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Give two example in the following case:
Co-ordinate bond compounds
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Propane and ethane are ______.
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Succeeding members of a homologous series differ by ______.
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Give the dot diagram of the first member of the alcohol.
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Give the abbreviated formula of the third member of the alcohol.
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Give the structure of the second member of the alcohol group.
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Give the names and the structural formula of the first three members of the homologous series of alkanes.
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What is homologous series ?
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What is the difference in the molecular formula of any two adjacent homologues in terms of molecular mass?
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What is meant by the term chemical bonding?
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Give the conditions for coordinate bond formation.
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