- Examples of salt which can be prepared by double decomposition are
- Silver chloride
- Magnesium nitrate
- Barium sulphate
- zinc carbonate
- Which cation is present in molten lead(II) iodide?
- Diagram below shows molecular formulae of two hydrocarbon compounds.
Which of the following is true about compounds A and B?
- Compound A is a saturated hydrocarbon
- Compound B is soluble in water.
- Compound A produces a lot of soot when burnt in air
- Compound B undergoes addition reaction
- Both ethanoic acid and hydrochloric acid with concentration of 1 mol dm-3 have
- the same concentration of hydrogen ions
- different degree of ionisation in water
- different pH value
- the same concentration of hydroxide ions
- Elements M and N combined to form a compound which has the following characteristics.
Low melting point
Does not dissolves in water
Which of the following is true about elements M and N?
- M and N have equal number of electrons
- Both M and N are transition metals
- M is a metal and N is a non metal
- Both M and N are non metals
- The electron arrangement of atom X is 2.8.3 and the electron arrangement of atom Y is 2.6.
Element X and Y can react to form a compound.
Which statement is true about the formation of the compound?
- The compound formed has a formula of XY3
- An covalent compound is formed
- Atom X releases 3 electrons
- Atom Y releases 6 electron
- Which diagram shows the arrangement of particles that has the strongest attraction force between the particles?
- Which of the following is incorrect about the conversion of unsaturated fats to saturated fats?
- The boiling point of the oil increases
- Physical state changes from liquid to solid
- Relative molecular mass of the oil molecule increases
- Intermolecular forces become weaker
- Figure below shows the set- up of apparatus for the experiment to determine the chemical properties of sulphuric acid.
Which of the following are the results from the above reaction?
- Zinc sulphate and water
- Zinc sulphate and hydrogen gas
- Zinc sulphate,water and carbon dioxide gas
- Zinc sulphate, water and carbon monoxide gas
- Table below shows the boiling points of three elements in Group 17.
Halogen Boiling point (°C) Fluorine -188 Chlorine -35 Bromine 59
Which of the following best explain why the boiling point increases down the group?
- Increase in proton number.
- Increase in strength of the intermolecular forces
- Increase in number of occupied shells of the atom
- Increase in strength of the covalent bond between the atoms