Chemistry

The equilibrium of an endothermic reaction which proceeds with an increase in volume can be shifted in the reverse direction by?

A. increasing the temperature and decreasing the pressure B. increasing the pressure and increasing the temperature C. decreasing the temperature…

5 years ago

CuO(s) + H2(g) ↔ Cu(s) + H2O(l). What is the effect of increasing the pressure on the equilibrium reaction?

A. The equilibrium is shifted to the left B. The equilibrium is shifted to the right C. There is no…

5 years ago

A catalyst increase the rate of a chemical reaction by providing a path that?

A. raise the activation energy B. increase the temperature C. lowers the activation energy D. increase the concentration Correct Answer:…

5 years ago

C(s) + H2O(g) → H2(g) + CO2(g) ΔG for the reaction above at 1300k is -43KJ. What becomes of this reaction at this temperature?

A. not feasible B. at equilibrium C. feasible D. exothermic Correct Answer: Option C - feasible

5 years ago

What current will deposit 3.25g of zinc in 2hrs? [Zn = 65, F = 96500 mol-]

A. 3.25A B. 2.00A C. 1.34A D. 0.67A Correct Answer: Option C - 1.34A

5 years ago

Which of the following metals is purified commercially by electrolysis?

A. Zn B. Fe C. Sn D. Cu Correct Answer: Option D - Cu

5 years ago

The oxidation state of Cr in K2Cr2O7 is?

A. +7 B. +6 C. +5 D. 4 Correct Answer: Option B = +6

5 years ago

The colour changes observed when testing for reducing agents using acidified potassium heptaoxodichromate (IV) solution is?

A. yellow to purple B. orange to green C. green to orange D. purple to yellow Correct Answer: Option B…

5 years ago

The salt formed from a reaction between citric acid and sodium hydroxide in solution will be?

A. acidic B. basic C. complex D. neutral Correct Answer: Option B - basic

5 years ago

What volume of 1.5M solution of KOH would contain 0.045 moles?

A. 67.50 cm³ B. 30.00 cm³ C. 6.75 cm³ D. 3.00 cm³ Correct Answer: Option B - 30.00 cm³

5 years ago