Which of the following compounds determines the octane rating of petrol?
Which of the following compounds determines the octane rating of petrol? A. 1,2,3 – trimethlpentane B. 2,3,5 –…
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Consider the following electrochemical cell notation: M(s) / M2+ (aq)// H+ (aq)/ H2(g). The value…
Consider the following electrochemical cell notation: M(s) / M2+(aq)// H+(aq)/ H2(g). The value of the electrode potential is…
Which of the following metals could be used as sacrifical anode for preventing the corrosion…
Which of the following metals could be used as sacrifical anode for preventing the corrosion of iron? A.…
What mass of copper would be formed when a current of 10.0 A is passed…
What mass of copper would be formed when a current of 10.0 A is passed through a solution…
What is the value of n in the following equation? Cr2O72- + 14H+ + ne-…
What is the value of n in the following equation? Cr2O72- + 14H+ + ne– → 2Cr 3+…
Consider the following reaction equation: X(g) + Y(g) ⇌ XY(g); ∆H = + 220KJ mol-1…
Consider the following reaction equation: X(g) + Y(g) ⇌ XY(g); ∆H = + 220KJ mol-1 If the temperature…
On evaporation to dryness, 250 cm3 of saturated solution of salt X with relative molar…
On evaporation to dryness, 250 cm3 of saturated solution of salt X with relative molar mass 101 gave…
When NH 4CI was dissolved in water, the container was cold to touch. This implies…
When NH 4CI was dissolved in water, the container was cold to touch. This implies that A. the…
The colour of phenolphthalein indicator in alkaline solution at the end-point of an acid-base titration…
The colour of phenolphthalein indicator in alkaline solution at the end-point of an acid-base titration is A. colourless…
Which of the following statements about enthalpy of neutralization is correct? It
Which of the following statements about enthalpy of neutralization is correct? It A. is constant for a strong…