For each statement

CHEMISTRY · Single correct

Problem

For each statement, choose whether it is true (T) or false (F): 1. Sulphide ions react with Na2[Fe(CN)5(NO)]\text{Na}_2[\text{Fe}(\text{CN})_5(\text{NO})] to form the purple compound Na4[Fe(CN)5(NOS)]\text{Na}_4[\text{Fe}(\text{CN})_5(\text{NOS})]. In this reaction, the oxidation state of iron changes. 2. Pt(IV)\text{Pt}(\text{IV}) compounds are relatively more stable than Ni(IV)\text{Ni}(\text{IV}) compounds. 3. Magnesium can be welded in an atmosphere of helium. 4. LiAlH4\text{LiAlH}_4 gives H2\text{H}_2 on hydrolysis. (1) FFTT (2) FTTT (3) TFTF (4) TFTT

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