The best way to distinguish between Na2CO3 and NaHCO2 is by?
A. adding an acid. B. adding an alkali. C. dissolving in water. D. exposing to air. E. heating. Correct Answer: Option E – heating
The Kinetic theory can NOT be used to explain?
A. allotropy. B. Brownian movement. C. diffusion. D. Tyndal effect. E. vaporization. Correct Answer: Option A – allotropy
The molar mass of a compound X is 56. its empirical formula is CH2. X is?
A. butene. B. butyne. C. ethene. D. propene. E. propyne Correct Answer: Option A – butene Explanation (CH2)x=56 (12+2)x=56 14x=56 x=56/14 x=4 Hence, the empirical formula is (CH2)×4 =...
Which compound will have the lowest boiling point?
A. CH3OH B. CH3COOH C. CH3CHOH D. C4H10 E. (CH3)3CH Correct Answer: Option D – C4H10
The Atomic theory model which explains that electrons in an atom revolve round quantized energy levels is attributed to?
A. Becquerel. B. Bohr. C. de Broglie. D. Rutherford. E. Thompson. Correct Answer: Option B – BohrProducts
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