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An aqueous solution of (NH4)2 SO4 is
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
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
Consider the following reaction equation
H3O+(aq) + OH(aq) → 2H2O(l)
The reaction represents
The refreshing characteristic taste of fizzy drinks is due to the presence of
A) Carbon (IV) oxide
D) Sodium Citrate
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
Which 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)
III. Nature of reactants
A) I and II only
B) II, III and IV only
C) I, II and III only
D) I, II, III and IV
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
Which of the following salts when dissolved in water will form a solution that will change blue litmus to red?
Which 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