The major component of petroleum gas (associated gas) is:
A. Hydrogen
B. Butane
C. Propane
D. Methane
Answer: Option D
Solution (By JKSSB Mock Tests)
Petroleum gas, also known as natural gas associated with oil deposits, is primarily methane (CH₄) with smaller amounts of ethane, propane, and butane. LPG is propane and butane. Methane is the lightest hydrocarbon. It is separated and used as fuel (CNG) or petrochemical feedstock.
Explanation:
The acidic behavior of HCl is due to the presence of H⁺ (or H₃O⁺) ions, which are generated only when it dissolves in water. Without moisture, HCl doesn't dissociate to produce H⁺, so it doesn't change the color of dry litmus. Both statements are correct and R explains A.
Explanation:
Catalase is an enzyme found in nearly all living organisms, particularly high in liver and red blood cells. It catalyzes the decomposition of toxic hydrogen peroxide to water and oxygen: 2H₂O₂ → 2H₂O + O₂. This protects cells from oxidative damage. It has one of the highest turnover numbers. Stomach has pepsin.
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