Why is graphite used as a pencil lead?

Important Questions on Carbon and its Compounds

MEDIUM

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 6 - Carbon and its Compounds>PRACTICE QUESTIONS (COMPETITION WING)>Q 51

Can molten copper be used in place of molten iron for the manufacture of artificial diamonds? Give a reason in support of your answer.

MEDIUM

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 6 - Carbon and its Compounds>PRACTICE QUESTIONS (COMPETITION WING)>Q 52

Diamond is a good thermal conductor like metals. However, it is a poor electrical conductor unlike metals. How can you account for this?

MEDIUM

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 6 - Carbon and its Compounds>PRACTICE QUESTIONS (COMPETITION WING)>Q 52

Two metallic elements A and B have $1$ and $2$ electrons in the valence shell "M" and "N" shell of their atoms respectively. The ratio of their core electrons in A and B is $5 : 9$. They formed two salts X and Y with monovalent and bivalent negative radicals of oxyacid of carbon. Identify X and Y. Justify their usage as antacids.

MEDIUM

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 6 - Carbon and its Compounds>PRACTICE QUESTIONS (COMPETITION WING)>Q 53

Why is activated charcoal widely used in water purifiers?

MEDIUM

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 6 - Carbon and its Compounds>PRACTICE QUESTIONS (COMPETITION WING)>Q 54

Burning more and more fossil fuels creates an imbalance in the natural carbon cycle as well as in the natural water cycle. Give reasons.

MEDIUM

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 6 - Carbon and its Compounds>PRACTICE QUESTIONS (COMPETITION WING)>Q 55

Carbon monoxide gas can be detected by passing it through a blood sample. Explain.

MEDIUM

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 6 - Carbon and its Compounds>PRACTICE QUESTIONS (COMPETITION WING)>Q 56

A building constructed from mortar becomes stronger on long standing. Give a reason.

MEDIUM

8th CBSE

IMPORTANT

Pearson IIT Foundation Chemistry>Chapter 6 - Carbon and its Compounds>PRACTICE QUESTIONS (COMPETITION WING)>Q 57

Why is CNG replacing petrol as an automobile fuel?