MCQ
Petroleum is found under the
- ✓sedimentary rocks
- Bwater
- Csand
- Dcoke
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Thermoplastics
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Thermosets
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$(i)$
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Soft
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Hard
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$(ii)$
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Can withstand heat
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Cannot withstand heat
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$(iii)$
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No cross linkages
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Cross linkages are present
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