Chemistry Archives - Page 304 of 414

Which of the following aqueous methods cannot be used to distinguish between a strong acid and a weak acid?

A. Conductivity measurement B. Measurement of pH C. Measurement of heat of neutralization D. Action on starch iodide paper Correct Answer: Option D D. Action on starch iodide paper

Which of the following processes is an endothermic reaction?

by Sunday | May 11 | Chemistry WAEC

A. Dissolving NH4CI crystals in water B. Addition of concentrated H2SO4 C. Dissolving NaOH pellets in water D. Passing SO3 gas into water Correct Answer: Option A A. Dissolving NH4CI crystals in water

Considered the reaction: H+(aq) + OH‾ (aq) → H2O(l). The energy change taking place in the reaction above is enthalpy of?

by Sunday | May 11 | Chemistry WAEC

A. formation B. hydration C. neutralization D. solution Correct Answer: Option C C. neutralization

If 20 cm³ of distilled water is added to 80cm³ of 0. 50 mol dm‾³ hydrochloric acid, the new concentration of the acid will be?

by Sunday | May 11 | Chemistry WAEC

A. 0.10mol dm‾³ B. 0.20mol dm‾³ C. 0.40mol dm‾³ D. 2.00mol dm‾³ Correct Answer: Option D D. 2.00mol dm‾³

If 1 mole of sodium contains 6 x 10²³ atoms, how many atoms are contained in 0.6 g of sodium? [Na = 23]

by Sunday | May 11 | Chemistry WAEC

A. 1.56 x 10²³ B. 1.56 x 10²² C. 3.6 x 10²³ D. 3.6 x 10²² Correct Answer: Option B B. 1.56 x 10²²

Which of the following aqueous methods cannot be used to distinguish between a strong acid and a weak acid?

Which of the following processes is an endothermic reaction?

Considered the reaction: H+(aq) + OH‾ (aq) → H2O(l). The energy change taking place in the reaction above is enthalpy of?

If 20 cm³ of distilled water is added to 80cm³ of 0. 50 mol dm‾³ hydrochloric acid, the new concentration of the acid will be?

If 1 mole of sodium contains 6 x 10²³ atoms, how many atoms are contained in 0.6 g of sodium? [Na = 23]

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