Chemistry

When iron is exposed to moisture and it rusts; the value of ΔG for the reaction is?When iron is exposed to moisture and it rusts; the value of ΔG for the reaction is?

When iron is exposed to moisture and it rusts; the value of ΔG for the reaction is?

A. neutral B. zero C. positive D. negative Correct Answer: Option D - negative

5 years ago
Phenolphthalein in acidic solution is?Phenolphthalein in acidic solution is?

Phenolphthalein in acidic solution is?

A. red B. orange C. colourless D. yellow Correct Answer: Option C - colourless

5 years ago
Which of the following ions require the largest quantity of electricity for discharge at an electrode?Which of the following ions require the largest quantity of electricity for discharge at an electrode?

Which of the following ions require the largest quantity of electricity for discharge at an electrode?

A. 4.0 moles of Cl- B. 3.0 moles of Na+ C. 2.5 moles of Cu²+ D. 2.0 moles of Al³+…

5 years ago
Which of the following equimolar solutions will have the highest pH?Which of the following equimolar solutions will have the highest pH?

Which of the following equimolar solutions will have the highest pH?

A. CH3COOHa B. NaOH C. HCl D. NH4OH Correct Answer: Option B - NaOH

5 years ago
Which of the following functional groups will give gas bubbles when treated with a saturated solution of sodium hydrogen trioxocarbonate (IV)?Which of the following functional groups will give gas bubbles when treated with a saturated solution of sodium hydrogen trioxocarbonate (IV)?

Which of the following functional groups will give gas bubbles when treated with a saturated solution of sodium hydrogen trioxocarbonate (IV)?

A. A B. B C. C D. D Correct Answer: Option B = B

5 years ago
2-methylbut-2-ene has the structure?2-methylbut-2-ene has the structure?

2-methylbut-2-ene has the structure?

A. A B. B C. C D. D Correct Answer: Option D = D

5 years ago
The oxidation of the compound below produces?The oxidation of the compound below produces?

The oxidation of the compound below produces?

A. 2-butanone B. 2-butanal C. 3-butanal D. 3-butanone Correct Answer: Option A = 2-butanone

5 years ago
What is the mixture Y in the diagram below?What is the mixture Y in the diagram below?

What is the mixture Y in the diagram below?

A. NH4NO3(s) + CaSO4(s) B. NH4Cl(s) + NaNO2(s) C. NH4NO2(s) + Na2SO4(s) D. NH4Cl(s) + Ca(OH)2(s) Correct Answer: Option D…

5 years ago
What is the gas represented X in the diagram below?What is the gas represented X in the diagram below?

What is the gas represented X in the diagram below?

  A. hydrogen B. chlorine C. oxygen D. hydrogen chloride Correct Answer: Option C - oxygen

5 years ago
The colour of the products will be?The colour of the products will be?

The colour of the products will be?

5SO2(g) + 2KMnO4(aq) + 2H2O(l) → K2SO4(aq) + 2MnSO4(aq) + 2H2SO4(aq) A. purple solution B. purple precipitate C. colourless precipitate…

5 years ago
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