Question 1 of 20 4,306 total questions
Determine the mass of copper deposited by 4.0 moles of electrons in the reaction represented by the equation below: Cu2 (aq) + 2e- → Cu(s)
The main difference between a primary cell and a secondary cell is that the primary cell
A is an electrolytic cell but the secondary is not
B cannot be recharged but the secondary cell can
C can be recharged but the secondary cell cannot
D contains electrodes but the secondary cell does not
Which of the elements will burn in excess oxygen to form a product that is neutral to litmus?
A Carbon
B Hydrogen
C Sulphur
D Sodium
Which of the following reactions is sulphur (IV) oxidizing agent?
A 2HNO 3(aq) + SO2(g) → H2 SO4(aq) + 2NO2(g)
B 2KMnO 4(aq) + 5SO2(g) + 2H2 O → K2 SO4(aq) +MnSO4(aq) 2H2 SO4(aq)
C FeCI3(aq) + SO2(g) + 2H2 O(l) → FeCI 2(g) + 2HCI(g) + H2 SO4(aq)
D 2H2 S(g) + SO2(g) →2H2 O(l) + 3S(s)
Which of the following methods is suitable for preparing insoluble salts?
A Thermal decomposition
B Oxidation
C Double decomposition
D Neutralization
When ice is changing to water, its temperature remains the same because the heart gained is
A used to separate the molecules
B lost partially to the atmosphere
C used to increase the volume of ice
D less than the activation energy
Which of the following compounds dissolves readily in water?
A BaSO4
B CuSO3
C NH4 CI
D AgCI
Consider the reaction represented by the equation below, xNH3(g) + yCI2(g) → zHCI(g) + N2(g) The values of x,y and z are respectively
A 2, 4, 6
B 3, 2, 4
C 2, 3, 6
D 3, 2 6
A salt that absorbs moisture from the atmosphere without forming a solution is said to be
A efflorescent
B deliquescent
C hygroscopic
D insoluble
What process is involved in the reaction represented by the following equation? AICI3 + 3H2 O(l) → AI(OH) 3(s) + 3HCI(g)
A dehydration
B hydrolysis
C double decomposition
D Neutralization
NaHCO3(s) can be distinguished from Na2 CO3(s) by the action of
A dilute hydrochloric acid
B carbon (IV) oxide
C aqueous ammonia
D heat
Which of the following is not an acid anhydride?
HNO3 does not usually react with metals to liberate hydrogen because HNO3 is
A a strong acid
B a corrosive acid
C an oxidizing agent
D a nitrating agent
Which of the following statements is not a postulate of the kinetic theory of gases?
A Molecules move with the same speed
B intermolecular forces are negligible
C Molecules are in a state of constant random motion
D collision between molecules is elastic
When X is heated with manganese (IV) oxide, oxygen is produced X is
A KCI
B KCIO3
C CaCO3
D ZnCO3
Which of the following factors does not affect the rate of reaction of CaCO3 with HCI?
A temperature of the reaction
B solubility of the CaCO3
C concentration of the HCI
D surface area of the CaCO3
The activation energy of a reaction can be altered by
A adding a reducing agent
B applying a high pressure
C using a catalyst
D changing the temperature
In which of the following reactions is the position of equilibrium not affected by an increase in pressure?
A 3Fe(s) + 4H2 O(g) ⇌ Fe3 O4(s) + 4H2(g)
B 2NO2(g) ⇌ N2 O 4(g)
C 3H2(g) + N2(g) ⇌ 2NH3(g)
D 2SO2(g) + O2(g) ⇌ 2SO3(g)
The volume occupied by a given mass of gas depends on its
A diffusion rate
B temperature and pressure
C degree of solubility
D relative density
Which of the following molecules has a linear structure?
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