Carry out tests to identify the anion in FB 7. The anion does not contain sulfur. Record your tests and observations in a suitable form in the space below. You must use a boiling tube if any liquid is heated.

Chemistry

IGCSE&ALevel

CAIE

Exam No：9701_s25_qp_32 Year：2025 Question No：3(b)

Answer:

Knowledge points:

12.1.1 explain the lack of reactivity of nitrogen, with reference to triple bond strength and lack of polarity

12.1.2.1 the basicity of ammonia, using the Brønsted–Lowry theory

12.1.2.2 the structure of the ammonium ion and its formation by an acid–base reaction

12.1.2.3 the displacement of ammonia from ammonium salts by an acid–base reaction

12.1.3 state and explain the natural and man-made occurrences of oxides of nitrogen and their catalytic removal from the exhaust gases of internal combustion engines

12.1.4 understand that atmospheric oxides of nitrogen (NO) can react with unburned hydrocarbons to form peroxyacetyl nitrate, PAN, which is a component of photochemical smog

12.1.5 describe the role of NO in the formation of acid rain both directly and in their catalytic role in the oxidation of atmospheric sulfur dioxide

Carry out tests to identify the anion in FB 7. The anion does not contain sulfur. Record your tests and observations in a suitable form in the space below. You must use a boiling tube if any liquid is heated.

Answer:

Knowledge points:

Solution:

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