OCR Module 5

Welcome to your OCR Module 5

Which of the following do not affect the value of Kp and Kc?
I. Temperature
II. Pressure
III. Concentration
What is the effect of increasing Kp on the equilibrium of a reaction?
Which of the following statements is incorrect?
Assuming complete dissociation, what is the pH of 0.5M potassium hydroxide (KOH)?
What is an acidic buffer is made of?
Which of the following orders is correct such that the first compound has the most negative lattice enthalpy and the last one has the least negative?
What causes a difference in theoretical and Born-Haber lattice enthalpies?
What can be said about entropy change when solid ammonium chloride decomposes to ammonia and hydrogen chloride gas?
What material is used as an electrode of a standard hydrogen electrode (SHE)?
Which of the following statements is true?
Which of the following affect the EMF of a cell?
I. Concentration
II. Temperature
Which of the following can cause colour changes in compounds of a transient element?
I. Ligand
II. Coordination number
III. Oxidation state
Which of the following statements about the oxidation state of transient elements is not correct?
Which of the following transition metals present in haemoglobin forms multidentate ligand with oxygen?
What type of reaction occurs between copper(II)hydroxide and excess ammonia?
A solution containing halide ions is acidified and the silver nitrate is added. A yellowish-white precipitate forms. To confirm which halid precipitate has formed, the student adds dilute ammonia and observes that the precipitate does not dissolve. Which halid ion could have been present in the original solution?
The rate of a reaction is not affected by a change in concentration of a reactant X. What is the order of the reaction with respect to X?
A reaction is first order with respect to reactant X and second order with respect to reactant Y. If the concentration of X is doubled and the concentration of Y is tripled, by what factor has the rate increased?
A reaction rate increases 9 times by tripling the concentration of reactant A. What is the order of the reaction with respect to A?
A mixture has a total pressure of 2kPa, contains 0.2 mol of nitrogen and 0.6 mol of oxygen. What is the partial pressure of the nitrogen gas in the mixture?