MCQ
Which one of the following is a bio-degradable polymer ?
- AHDPE
- BPVC
- CNylon 6
- ✓PHBV
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| Column – I | Column – II |
| A. Cyanide process | (i) Ultrapure Ge |
| B. Froth floatation process | (ii) Dressing of ZnS |
| C. Electrolytic reduction | (iii) Extraction of Al |
| D. Zone refining | (iv) Extraction of Au |
| (v) Purification of Ni |
The radius of an atom is 300 pm, if it crystallizes in a face centered cubic lattice, the length of the edge of the unit cell is ____________.
| Column – I | Column – II |
| A. Borazole | 1. $ \mathrm{B}(\mathrm{OH})_3 $ |
| B. Boric acid | 2. $ \mathrm{~B}_3 \mathrm{~N}_3 \mathrm{H}_6 $ |
| C. Quartz | 3. $ \mathrm{Na}_2\left[\mathrm{~B}_4 \mathrm{O}_5(\mathrm{OH})_4\right] 8 \mathrm{H}_2 \mathrm{O} $ |
| D. Borax | 4.$ \mathrm{SiO}_2 $ |