Amylase is an enzyme (biological catalyst) that breaks down starch. Platinum, V₂O₅, and iron are inorganic chemical catalysts. Enzymes are proteins, highly specific, and work under mild conditions.
Explanation:
In displacement reactions, a more reactive element displaces a less reactive one from its compound. Here, iron (more reactive than copper) displaces copper from copper sulfate. A is combination; B is decomposition; D is neutralization (double displacement).
Explanation:
Graphite mixed with clay forms pencil 'lead'. Its layered structure marks paper. Diamond is used in cutting, fullerene in nanotechnology, charcoal in filters and fuel.
Explanation:
When cement hydrates, it releases heat known as heat of hydration. This exothermic process can cause thermal cracking in massive concrete structures if not controlled. The main compounds C₃S and C₃A have high heat of hydration. For dams, low-heat cement with lower C₃A content is used. Heat of solution is for dissolving, combustion for burning, fusion for melting.
No comments yet. Be the first to start the discussion!