MCQ
Hypo is used in photography for
- ✓Developing a picture
- BPicture printing
- CThe colour of picture
- DThe fixation of the picture
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$\text { [en }= H _2 NCH _2 CH _2 NH _2 \text { ] }$

Reason : $Six F$ atoms in $SF_6$ prevent the attack of $H_2O$ on sulphur atom of $SF_6$.