Chemistry Test ...

Directions: The following question has four choices, out of which ONLY ONE is correct.

Which of the following spectrums gives information about molecular mass, molecular formula and molecular structure of an unknown compound?

An organic compound containing carbon, hydrogen and oxygen contains 52.20% carbon and 13.04% hydrogen. Vapour density of the compound is 23 g/m³. Its molecular formula will be

Which of the following methods is used for the separation of two immiscible liquids?

The empirical formula of a compound is CH₂. The mass of one mole of this compound is 42 g. Its molecular formula is

When pieces of human hair are heated strongly with soda lime, the smell of ammonia can be detected. Which of the following conclusions can be drawn from this observation?

Which of the following reagents will produce CCl₂F₂, commonly called as Freon 12?

Zinc/Silver oxide cell is used in electric watches.

Zn $\to$Zn²⁺ + 2e^- E⁰ = - 0.76 V

Ag₂O + H₂O + 2e^-$\to$2Ag + 2OH^- E⁰cell = 0.8 V

Find $∆$G⁰ in joules.

Which of the following is mostly used as a reference electrode?

The emf of Daniell cell (given below) at 298 K is E_1.

\(\mathrm{Zn}\left|\begin{array}{l}\mathrm{ZnSO} \\ (0.01 \mathrm{M})\end{array}\right|\left|\begin{array}{l}\mathrm{CuSO} \\ (1.0 \mathrm{M})\end{array}\right| \mathrm{Cu}\)

When concentration of ZnSO₄ is 1.0 M and that of CuSO₄ is 0.01 M, the emf is changed to E₂. What is the relationship between E₁ and E₂?

How many hours does it take to reduce 3 mol of Fe³⁺ to Fe²⁺ with 2.0 A current? [F = 96500 C]