Chemistry SS 2 3rd Term Examination
1 / 40
What happens to the solubility of most solids when the temperature of the solution increases?
2 / 40
Which substance is primarily responsible for temporary hardness of water?
3 / 40
Which apparatus is commonly used to accurately measure the volume of a solution during titration?
4 / 40
What is one advantage of hard water?
5 / 40
What happens to the solubility of most solids in water as the temperature increases? A) B) C) D)
6 / 40
What is the mass of sodium chloride (NaCl) in 250 cm³ of a 5 mol/dm³ solution? (Molar mass of NaCl = 58.5 g/mol)
7 / 40
Which of the following substances is commonly associated with permanent hardness of water?
8 / 40
In a neutralization reaction between HCl and NaOH, what is the expected mole ratio of HCl to NaOH?
9 / 40
What occurs when a solution is diluted?
10 / 40
What causes temporary hardness of water?
11 / 40
How many structural isomers does pentane have?
12 / 40
What is the primary purpose of titration in chemistry? A) B) C) D)
13 / 40
What is the molecular structure of hexane?
14 / 40
Which method is used to remove permanent hardness of water?
15 / 40
What is the primary purpose of using alum in water treatment?
16 / 40
What is the primary function of a solvent in a solution?
17 / 40
What is the term for the amount of solute per unit volume of solution?
18 / 40
What is slaked lime commonly used for?
19 / 40
What is the process of dissolving a weighed amount of solute in a solvent and then making up the solution to a specific volume called?
20 / 40
If the solubility of potassium nitrate (KNO₃) is 30 g/100 cm³ of water at 20°C, how many grams of KNO₃ will dissolve in 500 cm³ of water at the same temperature?
21 / 40
In a titration between a strong acid (HCl) and a strong base (NaOH), which indicator would be most suitable?
22 / 40
What is the purpose of filtration in separating mixtures?
23 / 40
When using a burette, what should you avoid?
24 / 40
What is the general formula for saturated hydrocarbons? A) B) C) D)
25 / 40
Which type of isomerism is exhibited by pentane isomers? A) B) C) D)
26 / 40
What is the molecular structure of pentane?
27 / 40
Which indicator is suitable for titrating a weak acid with a strong base?
28 / 40
Which of the following factors affects the solubility of a gas in a liquid?
29 / 40
The purest form of water is _________. A) Rain water B) pure water C) Distilled water D) sea water
30 / 40
What type of heat change occurs during a neutralization reaction?
31 / 40
What is the titre value in a titration experiment?
32 / 40
What happens to the solubility of most solids in water as temperature increases?
33 / 40
What is a key characteristic of a primary standard in chemistry?
34 / 40
What is the molar concentration of a solution containing 4 moles of NaOH in 2 liters of solution?
35 / 40
What is the state of a solution when the rate of dissolution of a solute equals the rate of precipitation? A) B) C) D)
36 / 40
What is the main difference between flocculation and sedimentation? A) B) C) D)
37 / 40
Which of the following statements is true about water and alcohol (ethanol)? A) B) C) D)
38 / 40
Which indicator is commonly used in acid-base titration?
39 / 40
What is a crucial precaution when using a pipette? A) B) C) D)
40 / 40
In physical properties of alkane, ____________
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