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An aqueous solution of (NH4)2 SO4 is
A) Acidic
B) Alkaline
C) Amphoteric
D) Neutral
Suggested Lesson: Reactions in Aqueous Solution | Reactions in Aqueous Solution
Comments (1)When NH4Cl(s) is dissolved in water, the container feels cold to touch. This implies
A) The process is endothermic
B) The process is exothermic
C) NH4Cl forms a saturated solution
D) NH4Cl is highly soluble in water
Suggested Lesson: Properties of Covalent Compounds | Bonding and Atomic Combinations
Comments (1)The pH of four solutions M, N, Q and R are 2, 6, 8 and 11 respectively.
Which of the following deductions about the solutions is correct?
A) The pH of N is increased when the solution is diluted
B) The pH of Q is increased when the solution is evaporated
C) M is the most alkaline solution
D) R is the most acidic solution
Suggested Lesson: The pH scale | Acid-Base and Redox Reactions
Post CommentConsider the following reaction equation
H3O+(aq) + OH(aq) → 2H2O(l)
The reaction represents
A) Esterification
B) Hydrolysis
C) Neutralization
D) Redox
Suggested Lesson: Acid-Base Neutralization | Acid-Base Equilibria
Comments (1)The refreshing characteristic taste of fizzy drinks is due to the presence of
A) Carbon (IV) oxide
B) Glucose
C) Hydrogen
D) Sodium Citrate
Suggested Lesson: The pH scale | Acid-Base and Redox Reactions
Comments (1)Chemical equilibrium is attained when
A) All the reactants have been completely used up
B) The reaction goes to completion
C) The concentration of reactants and products remain constant
D) The concentration of reactants and products are equal
Suggested Lesson: Summarizing Equilibrium Constants | Fundamental Equilibrium Concepts
Post CommentWhich of the following factors will affect the rate of the reaction represented by the following equation?
2HCl(aq) + CaCO3(s) → CaCl2(aq) + H2O(l) + CO2(g)
I. Pressure
II. Concentration
III. Nature of reactants
IV. Temperature
A) I and II only
B) II, III and IV only
C) I, II and III only
D) I, II, III and IV
Suggested Lesson: Names and Formulae of Substances | Classification of Matter
Comments (1)On evaporation to dryness, 350cm$^3$ of saturated solution of salt Z gave 55.5g of salt. What is the solubility of the salt? [Z = 101]
A) 1.57 moldm-3
B) 3.14 moldm-3
C) 6.28 moldm-3
D) 12.56 moldm-3
Suggested Lesson: Solubility | Solutions and Colloids
Comments (1)Which of the following salts when dissolved in water will form a solution that will change blue litmus to red?
A) CH3COONa
B) NH4Cl
C) NaCl
D) KCl
Suggested Lesson: Acid-Base Indicators | Acid-Base Equilibria
Post CommentWhich of the following bonds are broken when ethanol is boiled?
I. Covalent bonds
II. Ionic bonds
III. Hydrogen bonds
A) I only
B) II only
C) III only
D) I, II, III
Suggested Lesson: Covalent Bonding | Chemical Bonding
Comments (1)