Subject :NSO Class : Class 3
Subject :NSO Class : Class 3
Match the column I with column II and select the correct option.
| --Column I | Column II |
| (A) Noise pollution | 1. Bathing in rivers with soap |
| (B) Air pollution | 2. Factory chimneys |
| (C) Water pollution | 3. Burning wood |
| 4. Unnecessary blowing horns | |
| 5. Throwing untreated waste in water bodies |
A (A)-2,3; (B)-5; (C)-4,1
B (A)-1,5; (B)-2,3; (C)-4
C (A)-4; (B)-2,3; (C)-1,5
D (A)-4; (B)-1,5; (C)-2,3
Post Your Answer
Subject :NSO Class : Class 3
Post Your Answer
Subject :NSO Class : Class 8
Post Your Answer
Subject :NSO Class : Class 4
Post Your Answer
Subject :NSO Class : Class 7
Post Your Answer
Subject :NSO Class : Class 8
Ans 1:
Class : Class 8
Coal Tar is a mixture of 200 substances and is also used in manufacturing of various materials like paints, perfumes and photographic materials. The correct answer should be (B).
Post Your Answer
Subject :NSO Class : Class 6
Post Your Answer
Subject :NSO Class : Class 6
Post Your Answer
Subject :NSO Class : Class 8
Identify processes X and Y from the given statements and select the option that correctly identifies the microorganisms involved in them respectively.
X : Conversion of complex organic compounds into ammonia
Y : Conversion of nitrates in soil to free nitrogen
| X | Y | |
|---|---|---|
| A | Aspergillus | Bacillus |
| B | Micrococcus | Thiobacillus |
| C | Pseudomonas | Nitrocystis |
| D | Bacillus | Pseudomonas |
D