CHEMISTRY FUN CHALLENGE

  For a  first order reaction, what are the possible units of the rate constant?

• s

• 1/s

• 1/L.s

• mol/L.s

The rate law of reaction, rate=k[X]²[Y]^o. If the concentration both reactant is double, by what factor would the rate of reaction increase.

• 2

• 3

• 4

• 8

All the following would be expected to have enthalpy of formation values of zero EXCEPT

• A. Br₂ (l )

• B. F₂ (g)

• C. C (diamond) (s)

• D. O₂ (g)

Which compound is likely to have the greatest lattice energy.

• A. Lithium fluoride

• B. Lithium iodide

• C. Rubidium chloride

• D. Sodium chloride

   In an electrolytic cell, which of the following process occurs at anode during electrolysis?

•      A. Oxidation

• B. Reduction

• C. Formation of cation from the anode material

• D. Gain electron by anions

When an aqueous solution of AgNO₃ is electrolysed, a gas is formed at the anode. The gas is

•    A. O₂

•     B. H₂

• C. N₂O

• D. NO

The reddish-brown colour of bromine is immediately discharged when compound X is added to it. Which of the following could be compound X?

• A. Benzene

• B. Cyclohexane

• C. Pentane

• D. Pentene

Methane reacts with bromine in the presence of sunlight. Which of the following is a correct statement about the intermediate?

• A.      They are very stable

• B.      They are positively charged ion.

• C. They combine to form HBr.

• D. They contain an odd number of electrons.

What is the product obtained when propene is treated with basic cold dilute potassium permanganate (VII)?

• A.      CH₃CH(OH)CH₂OH

• B.      CH₃CH₂CH₂OH

• C.      CH₃CH₂CHO

• A.      CH₃COCH₃

Determine the structure of H

• 
• B. HOOC(CH₂)₆COOH

• 
• D. HOOC(CH₂)₄COOH