alyoan tariq
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Which statement is most likely to be true for astatine, which is below iodine in Group VII of the
Periodic Table?
A)Astatine and aqueous potassium chloride react to form aqueous potassium astatide and
chlorine
B)Potassium astatide and hot dilute sulfuric acid react to form white fumes of only hydrogen
astatide.
C) Silver astatide reacts with dilute aqueous ammonia in excess to form a solution of a soluble
complex.
D)Sodium astatide and hot concentrated sulfuric acid react to form astatine.
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InkRed
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Ans D

A) a halogen atom can only displace another halide ion from its salt if its above it in the group. At cant as its much below Cl. Reason is that oxidising ability of halogen atoms decreases down group

B) So2 is also produced. see reaction of KI with h2s04 which you have to learn

c)AgCl soluble. AgBr partially soluble if nh3 is conc. AgI insoluble. Following this trend down the group AgAt is insoluble

d) Correct. Again see reactions of iodide compounds with h2so4 in which I2 is also produced. Reducing ability of halide ions increases down the group. so At- is stronger RA and At will be produced
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alyoan tariq
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(Original post by InkRed)
Ans D

A) a halogen atom can only displace another halide ion from its salt if its above it in the group. At cant as its much below Cl. Reason is that oxidising ability of halogen atoms decreases down group

B) So2 is also produced. see reaction of KI with h2s04 which you have to learn

c)AgCl soluble. AgBr partially soluble if nh3 is conc. AgI insoluble. Following this trend down the group AgAt is insoluble

d) Correct. Again see reactions of iodide compounds with h2so4 in which I2 is also produced. Reducing ability of halide ions increases down the group. so At- is stronger RA and At will be produced
thank u so much !!!! ur explanation was great !!!!!
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