Chemistry
Grade-8
Easy
Question
The covalence of carbon cannot be expanded beyond ______.
- 3
- 6
- 5
- 4
Hint:
Recall the valency of carbon if the atomic number of carbon is 6.
The correct answer is: 4
The correct option is d)4.
Carbon can only have 4 pairs of electrons because only s and p orbitals can bond. Since carbon has no d-orbitals, this limits the maximum covalent bond to 4, but other members can have more covalent bonds.
Related Questions to study
Chemistry
The self-linking property of catenation is present in ______.
The self-linking property of catenation is present in ______.
ChemistryGrade-8
Chemistry
Match the following according to their applications:
Match the following according to their applications:
ChemistryGrade-8
Chemistry
Diamond is transparent to which rays?
Diamond is transparent to which rays?
ChemistryGrade-8
Chemistry
A scientist try to put pressure on all the three carbon allotropes to check which allotrope is weakest and which one is strongest. Choose the correct option
A scientist try to put pressure on all the three carbon allotropes to check which allotrope is weakest and which one is strongest. Choose the correct option
ChemistryGrade-8
Chemistry
Which allotrope has weak forces between its layers?
Which allotrope has weak forces between its layers?
ChemistryGrade-8
Chemistry
Which of the following is incorrect about diamond?
i. It is soft in nature.
ii. It has high density.
iii. It has high melting point.
iv. It is soluble in all solvents.
Which of the following is incorrect about diamond?
i. It is soft in nature.
ii. It has high density.
iii. It has high melting point.
iv. It is soluble in all solvents.
ChemistryGrade-8
Chemistry
In which of the following carbon atom is covalently linked to other four carbon atoms?
In which of the following carbon atom is covalently linked to other four carbon atoms?
ChemistryGrade-8
Chemistry
Which allotrope has a free electron between its layers that give rise to electrical conductivity?
Which allotrope has a free electron between its layers that give rise to electrical conductivity?
ChemistryGrade-8
Chemistry
Which allotrope shows photochromic effect?
Which allotrope shows photochromic effect?
ChemistryGrade-8
Chemistry
Fullerene, Diamond and graphite come in the category of:
Fullerene, Diamond and graphite come in the category of:
ChemistryGrade-8
Chemistry
________ is used in electrodes.
________ is used in electrodes.
ChemistryGrade-8
Chemistry
The valency for the carbon is ______.
The valency for the carbon is ______.
ChemistryGrade-8
Chemistry
The allotrope of carbon used in making jewellery is _____.
The allotrope of carbon used in making jewellery is _____.
ChemistryGrade-8
Chemistry
Select the allotrope used in pencils.
Select the allotrope used in pencils.
ChemistryGrade-8
Chemistry
The layers of the graphite which force acts between them?
The layers of the graphite which force acts between them?
ChemistryGrade-8
