MCQ
Which of them are Non $-$ biodegradable waste?
- ASynthetic fibers.
- BPen refills.
- CSilver foil.
- ✓All of above.
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(Assume: Momentum is conserved when photon is absorbed. Use: Planck constant $=6.6 \times 10^{-34} J s$, Avogadro number $=6 \times 10^{23} mol ^{-1}$, Molar mass of $He =4 g mol ^{-1}$ )
| Column $I$ | Column $II$ |
| $(A)$ Silica gel | $(i)$ Transistor |
| $(B)$ Silicon | $(ii)$ Ion-exchanger |
| $(C)$ Silicone | $(iii)$ Drying agent |
| $(D)$ Silicate | $(iv)$ Sealant |