6. Elements are arranged in increasing order of atomic mass in the Periodic Table. - Which of the following scientists made the above statement?
Mendeleev
Newlands
Meyer
Dobereiner
7. Which of the following salt is soluble in water?
Lead(II) iodide
Silver chloride
Sodium carbonate
Barium sulphate
8. What is the volume of oxygen gas used if 5.5 g of propane is completely burnt in air? Molar Volume: 24 dm3 per mol (Tip: Write down the equation)
3.0dm^3
15.0dm^3
9.0dm^3
30.0dm^3
9. What is the product of water and pentyl ethanoate under acidic conditions?
Ethanoic acid and pentanol
Pentanol, two equivalents
Butanol and water
Ethanoic acid, two equivalents
10. Propene undergoes complete combustion in excess air. Which of the following are the products formed?
Hydrogen and carbon dioxide
Water and carbon dioxide
Hydrogen and carbon monoxide
Water and carbon monoxide
11. Which of the following substances are the most suitable for the preparation of lead(II) sulphate salt?
Lead(II) nitrate solution and potassium sulphate solution
Solid lead(II) carbonate and potassium sulphate
Solid lead(II) nitrate and calcium sulphate
Solid lead(II) oxide and sodium sulphate
12. Which of the following substance conducts electricity in molten state?
Sulphur
Tetrachloromethane
Magnesium oxide
Naphthalene
13. Imagine an aluminium window grill. Which of the following explains why does the window does not corrode rapidly?
Aluminium is protected by a layer of aluminium oxide on its surface.
Aluminium reacts with air in the presence of water.
Aluminium is a light and hard metal.
Aluminium has a low specific heat capacity.
14. Which of the following pairs of additive in detergent and its function is correct?
Sodium perborate - To convert stains into colourless substances
Sodium tripoliphosphate - To enable detergent to be poured easily
Sodium silicate - To remove protein stain
Sodium sulphate - To soften the water
15. Solution & pH value - P-1.0 Q-3.0 R-5.0 S-6.0 : Which of the solution has the highest degree of dissociation?
S
P
R
Q
16. Imagine a cold pack. The main compound used to produce the material in cold pack is manufactured by
Haber Process
Contact Process
Alloying
Polymerization
17. Element P and element Q have proton number of 19 and 8 respectively. What is the relative molecular mass of a compound formed between P and Q? [Relative atomic mass : P = 39, Q = 16]
94
71
46
35
18. Which of the following statement is about oxidation reaction?
Loss of electrons
Decrease in oxidation number
Gain of hydrogen
Loss of oxygen
19. During the experiment to determine the heat of precipitation, silver nitrate solution is added to zinc chloride solution. The accuracy of the results is increased by …
conducting the experiment next to an open window.
wrapping the polystyrene cup with aluminium foil.
wrapping the polystyrene cup with cotton.
using a ceramic cup instead of a polystyrene cup.
20. Which of the following substance is made up of ions?
