Whose experiment showed that the atom has a tiny positively charged nucleus?

• A) Thompson
• B) Rutherford
• C) Millikan
• D) Dalton

How many faraday of electricity is required to produce 0.25 mole of copper?

• A) 1.00F
• B) 0.01F
• C) 0.05F
• D) 0.50F

Which of the following raw materials is used in the plastic industry ?

• A. Calcium
• B. Ethene
• C. Hydrogen
• D. Methane

The gas produced when a mixture of sodium propanoate and soda lime is heated is

• A. methane
• B. pentane
• C. ethane
• D. butene

Which halogen is a gas at room temperature and is pale yellow in color?

• A. Chlorine (Cl)
• B. Fluorine (F)
• C. Iodine (I)
• D. Bromine (Br)

The basic tenet of valence bond electron pair repulsion theory is that the pairs of electrons making the sigma bonds dictate the shape of molecules. The pi-bonds often encounter in some molecules serve to

• A) distort the shape of molecules
• B) alter the angle between the atoms in molecules
• C) shorten the sigma bonds in molecules
• D) explain the shape of molecules.

Which of the following process does not take place in domestic water treatment?

• A. Chlorination
• B. Flocculation
• C. Neutralization
• D. Sedimentation

Platinum electrodes are dipped into copper sulphate solution in a voltameter. The solution left after electrolysis is

• A) clear
• B) blue
• C) pale blue
• D) sky blue

Calculate the number of moles of HCl present in 20cm3 of a 0.75M solution of the acid

• A. 0.015 mole
• B. 0.038 mole
• C. 3.800 moles
• D. 1.500 moles

Which is the following does not represent an alkane?

• A)
  \(C_{6}H_{14}\)
• B)
  \(C_{13}H_{28}\)
• C)
  \(C_{18}H_{36}\)
• D)
  \(C_{19}H_{40}\)