MEDIUM
8th CBSE
IMPORTANT
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Diamond is a good thermal conductor like metals. However, it is a poor electrical conductor unlike metals. How can you account for this?

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 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?
MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 6 - Carbon and its Compounds>PRACTICE QUESTIONS (COMPETITION WING)>Q 58
Dry ice should not be stored in a sealed bottle. Explain with an appropriate reason.
HARD
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 6 - Carbon and its Compounds>PRACTICE QUESTIONS (COMPETITION WING)>Q 59
Two non-metal atoms contain the same number of electrons in their valence shells. One of the non- metals in its most abundant form reacts with the other non-metal forming a very stable compound A. Compound A on reaction with oxygen and fused sodium hydroxide gives two products B and C. B is used as a raw material for the manufacture of glass and C is the major constituent of glass. Identify A, B and C. Write balanced chemical equations for the above reactions.