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Question
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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Solution
Chloride ion (Cl-)
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RELATED QUESTIONS
By drawing an electron dot diagram show the formation of Ammonium ion [Atomic No.: N = 7 and H = 1]
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) |
Give a reason for Inert gases do not form ions.
Give the conditions for coordinate bond formation.
Fill in the blank
Coordinate bond is also called __________bond.
Fill in the blanks
A coordinate bond is represented by an arrow pointing from ________ to__________ atom.
By drawing an electron dot diagram, show the lone pair effect leading to the formation of ammonium ion from ammonia gas and hydrogen ion.
Bonding in this molecule can be understood to involve coordinate bonding.
What are the term defined below?
A bond formed by a shared pair of electrons with both electrons coming from the same atom.
Give reason for the following:
Covalent compounds have a low melting and boiling point.
