To test for the presence of chloride ions; the correct sequence of reagents to use is?

5 years ago

A. Ba(NO3)2(aq) then HNO3(aq). B. HCl(aq) then Ba(NO3)2(aq). C. HCl(aq) then AgNO3(aq). D. HNO3(aq) then fresh FeSO4(aq). E. HNO3(aq) then…

NaCl(s) does NOT conduct electricity but NaCl(aq) does. This is because?

5 years ago

A. NaCl(s) is non-ionic but NaCl(aq) is ion B. NaCl(aq) contains mobile electrons, where absent in NaCl(s). C. NaCl(aq) contains…

The green colour solution of Fe²+ salt changes to a brown solution of Fe³+ salt by?

5 years ago

A. conversion. B. elimination. C. oxidation. D. reduction. E. substitution. Correct Answer: Option C - oxidation

Which method is NOT used to determine rate of a reaction?

5 years ago

A. change in amount of precipitate formed B. change in equilibrium constant C. change in intensity of colour D. change…

Faraday s first law of electrolysis can be expressed mathematically as?

5 years ago

A. m = I/it B. m α it C. Q = it D. Q α I/it E. Q α it…

Which pair of substances show the least conductance?

5 years ago

An experiment to test the conductance of 0.1M solutions of the substances listed below was performed. I ammonia II ammonium…

The best way to distinguish between Na2CO3 and NaHCO2 is by?

5 years ago

A. adding an acid. B. adding an alkali. C. dissolving in water. D. exposing to air. E. heating. Correct Answer:…

The Kinetic theory can NOT be used to explain?

5 years ago

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?

5 years ago

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…