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Chemistry Nationality No. Quiz

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Questions and Answers

Which of the following atoms and ions has a different electron configuration from the others?

Na* (correct)

Which combination of substances will not produce ammonia under appropriate conditions?

Calcium hydroxide and ammonium chloride

Copper and concentrated nitric acid

Urea and water (correct)

Nitrogen and hydrogen

Which statement accurately describes the gas-liquid boundary in a pure substance's phase diagram?

It remains constant at the triple point.

It extends infinitely towards higher temperatures and pressure. (correct)

It is positive for water.

It has a negative slope.

Which of the following acid aqueous solutions is non-volatile?

H2SO4 (C) Signup and view all the answers

What occurs when manganese peroxide reacts with hydrogen peroxide under acidic conditions?

Generation of H2Mn2+ (A) Signup and view all the answers

Among the substances provided, which one contains a triple bond?

Cyanic acid (D) Signup and view all the answers

What is the result of Mn2+ being oxidized by H2O2 under basic conditions?

Formation of MnO4 (C) Signup and view all the answers

Which of the substances is a liquid under atmospheric pressure at 25°C?

Br₂ (D) Signup and view all the answers

Which combination correctly represents the reactants in the oxidation reaction of Mn2+ by H2O2 under basic conditions?

Manganese peroxide and water (C) Signup and view all the answers

Which property description of sodium is incorrect?

Sodium metal is chemically stable in an ambient atmosphere. (C) Signup and view all the answers

Among the given substances, which one does not have a correct reference number associated with it?

F (C) Signup and view all the answers