Edexcel 4

Welcome to your Edexcel 4

Which of the following statements about the oxidation state of transient elements is not correct?

Which of the following is used as a catalyst in the Haber process?

Transition metals can act as homogeneous catalysts because they can form various...

The Addition of concentrated HCl to aqueous ions of Cu lead to a change in coordination number from...

Adding all the individual orders of a reaction together gives us?

The reaction rate increases 9 times by tripling the concentration of reactant A. What is the order of the reaction with respect to A?

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?

What is the effect of increasing the temperature on rate constant k?

Which of the following is the the rate-determining step in mechanisims?

Which of the following causes the formation of a silver mirror when Tollens' reagent is added to it?

What is the product when sodium tetrahydridoborate is added to propanone in aqueous ethanol?

What is the ratio of enantiomers in a racemic mixture?

Which of the following statements is true?

What is the product when sodium tetrahydridoborate is added to propanone in an aqueous ethanol?

By what mechanism is benzene converted to nitrobenzene?

What is the mechanism of Friedel-Crafts alkylation?

Which of the following statements is incorrect?

What is the product of the reaction between acylchloride and alcohol?

What is the product of the oxidation of aldehydes?

How many peaks of C-13 NMR are there for 2-methylbutane?

HPLC (High performance liquid chromatography) is a type of?

How many equivalent H atoms are there in 2-bromobutane with reference to H-NMR?

Gas-liquid chromatography can be used to separate mixtures of...

Which of the following is true about tetramethylsilane?
I. It is non-toxic
II. It shows one peak on H-NMR
III. It has a low boining point

What is the state of the stationary phase in Thin-layer Chromatography?