Which of the following statements about the cell notation Mg/Mg2+//Cu2+/Cu is correct?
- A. copper is the anode
- B. Manesium is reduced
- C. Magnesium is the anode
- D. The double line represents the electrodes
The rate of chemical reaction of solids are not affected by
- A. catalyst
- B. pressure
- C. particle size
- D. temperature
Consider the equilibrium reaction represented by the following equation: 2SO2(g) + O2(g) ⇌ 2SO3(g); ∆H = 395.7 kJmol-1 Which of the following statements about the equilibrium system is correct?
- A. Addition of catalyst changes the equailibrium position
- B. Decrease in pressure increase in temperature SO3
- C. Decrease in pressure increases the equilibrium concentration of O2
- D. Increase in temperatur favours the forward reaction
Which of the following factors would not affect the solubility of a gas?
- A. Concentration
- B. Nature of solvent
- C. Pressure
- D. Temperature
Which of the following chlorides is insoluble in water?
- A. AgCI
- B. KCI
- C. NH4CI
- D. ZnCI2
The following substances are normal salts except
- A. AI(NO3)3
- B. FeSO4
- C. Mg(OH)NO3
- D. NaCI
Which of the following equimolar solutions would have the highest conductivity?
- A. NH4NO3(aq)
- B. NaNO3(aq)
- C. Mg(NO3)2(aq)
- D. AI(NO3)3(aq)
Which of the following oxides is basic?
- A. NO2
- B. AI2O3
- C. SO2
- D. CaO
The minimum amount of energy required for effective collisions between reacting particles is known as
- A. activation energy
- B. bond energy
- C. kinetic energy
- D. potential energy
The determination of heat of combustion is carried out with
- A. a thermometer
- B. a bomb calorimeter
- C. an evaporating dish
- D. a boiling tube
Which of the following gases contains the highest number of atoms at s.t.p?
- A. 6 moles of neon
- B. 3 moles of oxygen
- C. 2 moles of chlorine
- D. 1 mole of ethane
A given volume of oxygen diffused through a porous partition in 8 seconds. How long would it take the same volume of carbon (IV) oxide to diffuse under the same condition? [C = 12.0, O = 16.0]
- A. 5.8 seconds
- B. 6.8 seconds
- C. 9.4 seconds
- D. 11.0 seconds
Which of the following apparatus can be used to measure accurately a specific volume of a liquid?
- A. Beaker
- B. Conical flask
- C. Measuring cylinder
- D. Pipette
What is the volume occupied by 2 moles of ammonia at s.t.p?
- A. 44.8 dm-3
- B. 22.4 dm-3
- C. 11.2 dm-3
- D. 5.6 dm-3
A solution of sodium trioxocarbonate (IV) contains 10.6g in 250cm3 of solution. Calculate the concentration of the solution. [Na2CO3 = 106.0]
- A. 0.4 mol dm-3
- B. 1.0 mol dm-3
- C. 10.6 mol dm-3
- D. 25.0 mol dm-3
Consider the neutralization reaction represented by the following equation: Na2CO3 + 2HNO 3 → 2NaNO3 + H2O + CO2 The stoichiometric ratio of acid to base is
- A. 2:2
- B. 2:1
- C. 1:2
- D. 1:1
The bonds in crystaline ammonium chloride are?
- A. covalent and dative
- B. ionic and covalent
- C. ionic covalent and dative
- D. ionic covalent and hydrogen bond
Which of the following molecules has a triple bond in its structure?
- A. CH4
- B. NH3
- C. N2
- D. O 2
Which of the following molecules has a linear shape?
- A. CH4
- B. CO 2
- C. H2S
- D. NH 3
A solid substance with high melting and boiling points is likely to be a/an
- A. covalent compound
- B. dative covalent compound
- C. electrovalent compound
- D. non-metal
Which of the following species correctly represented an ion of M with 13 protons and 10 electrons?
- A. 10M 3+
- B. 10M 3-
- C. 13M 3+
- D. 13M 3-