Advertisements
Advertisements
प्रश्न
The atomic numbers of four elements P, Q, R and S are 6, 10, 12 and 17 respectively. Which two elements can combine to form a covalent compound?
(a) P and R
(b) Q and S
(c) P and S
(d) R and S
Advertisements
उत्तर
(c) P and S
Element P needs 4 electrons to complete its octet. They can be shared with element S, which needs only 1 electron to complete its octet.
APPEARS IN
संबंधित प्रश्न
State the reason to explain why covalent compounds "have low melting and boiling points."
How does graphite act as a lubricant?
Draw the electron-dot structure of NH3 and state the type of bonding.
Why are covalent compounds generally poor conductors of electricity?
The electronic configurations of three elements X, Y and Z are as follows:
| X | 2, 4 |
| Y | 2, 7 |
| Z | 2, 1 |
(a) Which two elements will combine to form an ionic compound?
(b) Which two elements will react to form a covalent compound?
Give reasons for your choice.
Define a coordinate bond.
Explain the following term with example.
Homopolymer
Give reason as to why hydrogen chloride can be termed as a polar covalent compound.
Explain the bonding in methane molecule using electron dot structure.
Fill in the blank from the choice given in bracket.
The compound that does not have a lone pair of electrons is ___________. (Water, Ammonia, carbon tetrachloride)
Which of the following is a common characteristic of a covalent compound?
Draw an electron dot diagram to show the formation of the following compound.
Magnesium chloride [ H=1, C=6, Mg=12, Cl=17].
Electrons are getting added to an element Y:
Is Y getting oxidised or reduced?
Explain why carbon tetrachloride does not dissolve in water.
Element A has 2 electrons in its M shell. Element B has atomic number 7.
If the compound formed between A and B is melted and an electric current is passed through the molten compound, the element A will be obtained at the ______ and B at the ______ of the electrolytic cell.
What are Allotropes? Name any two allotropic forms of carbon. Give one use of it.
Name two carbon compounds used in day-to-day life.
Write an Explanation.
Alkene
Cation is formed when ______.
The electron dot structure of chlorine molecule is:
