Chemistry Past Questions And Answers
The functional groups present in the compound above are
- A) alkene and halo-group
- B) hydroxyl and chloro-group
- C) alkene and chloro-group
- D) hydroxyl and halo-group
The final products of the reaction between methane and chlorine in the presence of ultraviolet light are hydrogen chloride and
- A) tricloromethane
- B) dichloromethane
- C) tetrachloromethane
- D) chloromethane
The vapour pressure of a given volume of liquid increase when the
- A. liquid becomes saturated with a salt
- B. Volume of the liquid increases
- C. temperature of the liquid falls
- D. temperature of the Liquid rises
Two hydrocarbons X and Y were treated with bromine water. X decolorised the solution and Y did not not. Which class of compound does Y belong?
- A) Benzene
- B) Alkynes
- C) Alkenes
- D) Alkanes
Dehydration of ethanol produces
- A. ethanoic acid
- B. propan-1,2,3-triol
- C. ethene
- D. ethanal
What is the chemical formula of the compound containing: 6.02 × 1023toms of Hydrogen, 35g of chlorine, and 4 moles of oxygen atoms?
- A) HCl4O
- B) HClO
- C) HClO4
- AD) HCl2O4
Which of the following statements about the electrolysis of CuSO44aq) using copper cathode and platinum anode is not correct?
- A. Copper is deposited at the cathode
- B. Oxygen is liberated at the anode
- C. it is used for the purification of copper
- D. The solution becomes acidic
A saturated solution of AgCl was found to have a concentration of 1.30 \(\times\) 10\(^{-5}\) moldm\(^{-3}\). The solubility product of AgCl therefore is
- A)1.30 \(\times\) 10\(^{-5}\) mol\(^2\)dm\(^{-6}\)
- B)2.60 \(\times\) 10\(^{-12}\) mol\(^2\)dm\(^{-6}\)
- C)1.30 \(\times\) 10\(^{-7}\) mol\(^2\)dm\(^{-6}\)
- D)1.69 \(\times\) 10\(^{-10}\) mol\(^2\)dm\(^{-6}\)
The addition of water to calcium oxide leads to
- A) a physical change
- B) a chemical change
- C) the formation of mixture
- D) an endothermic change
The metal that will react with water only in the form of steam to liberate hydrogen gas is
- A) calcium
- B) aluminium
- C) iron
- D) zinc