Question
Which one of the following is used as catalyst in
hydrogenation of oil?Solution
1. Process Details: a. Nickel catalyst (Raney nickel) at 120-190°C b. Converts liquid oils → semi-solid fats (e.g., vanaspati) 2. Why Nickel? a. High surface area (150 m²/g) b. Selective for cis→trans conversion 3. Health Concern: a. Residual Ni limit: ≤1.5 ppm (FSSAI standards) b. Linked to cardiovascular diseases 4. Alternatives: a. Palladium (expensive) b. Enzymatic hydrogenation (emerging tech)
24 × ?2 – 11 × 4 = 1900
- What will come in place of (?), in the given expression.
√2500 + 12² – 144 ÷ 6 = ? (744 ÷ 6) - (120/5) + 5.5% of 800 = ?2
2048 × 1824 ÷ 76 = (? - 212) × 64
Find the value of (x + y)² - (x - y)², where x = 15 and y = 7.
What are the values of k, if the roots of the equation x² + 2(k - 4)x + 2k = 0 are equal?
√676 + (0.75 × 80) + (72 ÷ 3) = ? - 82
38 – 3 2 + 5 2 + 6 2 = ? × 6Â
