The reactivity series lists metals in the order of:
A. Increasing density
B. Decreasing tendency to lose electrons
C. Decreasing reactivity
D. Increasing atomic mass
Answer: Option C
Solution (By JKSSB Mock Tests)
The reactivity series arranges metals from most reactive (K) to least reactive (Au). A metal higher in the series can displace a lower one from its salt solution. The order is based on tendency to lose electrons (form positive ions). More reactive = more electropositive.
Explanation:
Cracking is a petrochemical process where complex, heavy hydrocarbon molecules are broken down (cleaved) into lighter, more valuable molecules like gasoline and alkenes. This is achieved by applying high temperatures and pressures, often in the presence of a catalyst (catalytic cracking).
Explanation:
A negative catalyst (inhibitor) slows down a reaction. Phosphoric acid (or acetamide) retards the decomposition of Hâ‚‚Oâ‚‚ by stabilizing it. MnOâ‚‚ is a positive catalyst for Hâ‚‚Oâ‚‚ decomposition, speeding it up. Platinum catalyzes SOâ‚‚ oxidation in contact process. Iron (Fe) catalyzes ammonia synthesis in Haber process. Negative catalysts are often used to prevent undesirable reactions, e.g., antioxidants in food preservation.
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