MCQ
Choose the correct unit for the relative density among the following:
- Akg/cm
- Bunitless
- Ckg/cm
- ✓kg/m3
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The term ‘cell’ was given by:
| S.No | Column I | | Column II |
| a | 9.033 × 1024 atoms | i | 46g of He |
| b | 2 moles of Na | ii | 15 moles |
| c | 11.2 L of O2, at STP | iii | 3.011 × 1023 molecules |
| d | 22g of CO2 | iv | 16g |
The element which is required in largest quantity by plants is: