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By drawing an electron dot diagram show the formation of Ammonium ion [Atomic No.: N = 7 and H = 1]
Concept: Coordinate Bond
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
Concept: Coordinate Bond
Give appropriate scientific reasons for Carbon tetrachloride does not conduct electricity.
Concept: The Covalent Bond
Explain the bonding in methane molecule using electron dot structure.
Concept: The Covalent Bond
Choose the most appropriate answer from the following list of oxides which fit the description.
A covalent oxide of a metalloid.
Concept: The Covalent Bond
Name the following:
The property of element by virtue of which atoms of the element can link to each other in the form of a long chain or ring structure.
Concept: The Covalent Bond
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
Concept: Coordinate Bond
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) |
Concept: Coordinate Bond
An element L consists of molecules.
What type of bonding is present in the particles that make up L?
Concept: The Covalent Bond
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
Concept: Coordinate Bond
Draw an electron dot diagram for the formation of the following. State the type of bonding present in them.
Ammonium ion
Concept: Formation of Covalent Bond
The general formula of hydrocarbons with single covalent bonds is ______.
Concept: Types of Covalent Bonds
Non-polar covalent compounds are ______ conductors of heat and electricity.
Concept: The Covalent Bond
Draw the electron dot structure for the following:
A molecular nitrogen
[At. No. : N = 7, H = 1]
Concept: Formation of Covalent Bond
Draw the electron dot structure of Methane molecule.
[Atomic number: N = 7, C = 6, H = 1]
Concept: Formation of Covalent Bond
Draw the electron dot structure of Nitrogen molecule.
[Atomic number: N = 7, C = 6, H = 1]
Concept: Formation of Covalent Bond
Give reason for the following:
Covalent compounds have a low melting and boiling point.
Concept: Coordinate Bond
Carbon tetrachloride is a ______ covalent molecule.
Concept: Formation of Covalent Bond
The following table shows the electronic configuration of the atoms A, B, C and D.
| Element | A | B | C | D |
| Electronic configuration | 2, 8, 8, 2 | 2, 6 | 2, 8, 7 | 2, 4 |
- Write the formula of the compound formed between:
- A and B
- D and C
- Which of the above elements will exhibit catenation?
Concept: Formation of Covalent Bond
