Question
Naphthalene balls, commonly used as a pest repellent,
are derived from which source?Solution
Naphthalene balls are made from coal tar and are used as insecticides and pest repellents, especially against moths and cockroaches. The chemical formula of naphthalene is C₁₀H₈.
More Chemistry GS Questions
(14.14 × 29.98) + 20.15% of 549.99 = ? + 120.34
? = 44.78% of 839.91 – 48.12% of 774.89 + 55.77% of 1024.85
79.95 × 25.001 – 20.001 × 129.90 + 839.99 = ?
24.45% of 14.99% of 14999.78 + 159.80 = ?% of 1999.78
(2100.23 ÷ 34.98) + (864.32 ÷ 23.9) + 1854.11 =?
1959.09 + 33.94% of 6250.06 – ? = √10609.02 + √144.24
15.232 + 19.98% of 649.99 = ? × 4.99
149.78% of 319.87 – 199.83% of 45.45 = 130.03% of (? × 12.01)
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
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