Tar roads get damaged if there is
1). stagnation of water on road
2). heavy traffic
3). no maintenance
4). no sloping
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2. Which of the following gases is used in cigarette lighters?
4. Which gas is used for converting vegetable oils into saturated fats
5. The main constituent of naturalgas is
6. Curd is sour due to presence of
7. Denatured spirit is ethanol mixed with
8. Among the following the hardest metal is
9. Which gas is used for converting vegetable oils into saturated fats ?