MCQ
Photoelectric effect can be caused by
- Avisible light but not $X-$ rays
- BGamma rays but not by $X-$ rays
- C$U.V.$ light only
- ✓Visible light, $U.V.$ rays and Gamma rays also
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Here $W, Y$ and $Z$ are left, up and right elements with respect to the element $'X'$ and $'X'$ belongs to $16^{th}$ group and $3^{rd}$ period. Then according to given information the incorrect statement regarding given elements is