Match the property given in Column I with the related element(s) given in Column II
and select the answer from the codes given below
Column I Column II
i. Unusual low melting point p. B
ii. Extremely toxic q. Al
iii. Forms acidic oxide r. Ga
iv. The most stable in +1 state s. In
v. Semiconductor t. Tl
vi. Forms molecular fluoride

Moderate

Solution

(i) $\to$ (r) Ga melts even on keeping on palm.
(i) $\to$ (t)
(iii) $\to$ (p) $B_{2} O_{3}$ , is an acidic oxide.
(iv) $\to$ (t) ${TI}^{+} > {TI}^{3 +} ({TI}^{+} > {In}^{+} > {Ga}^{+})$
(v) $\to$ (p)
(vi) $\to$ (p) BF₃

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