What will happen if an aluminium spoon is used to stir a solution of iron (II) trioxonitrates (V)?
- A. The spoon will be oxidized while the iron (II) ions will be reduced to the metal
- B. The spoon will increase in size
- C. The spoon will be reduced while the iron (II) ions will be oxidized
- D. The spoon will be reduced
What is the correct IUPAC name for NO\(_{2} ^{-}\)?
- A. Dioxonitrate (IV) ion
- B. Trioxonitrate (III) ion
- C. Trioxonitrate (IV) ion
- D. Dioxonitrate (III) ion
When sulphur (IV) oxide is passed into a solution of sodium hydroxide for a long time, it eventually produces a solution of
- A. NaHSO4
- B. Na2SO3
- C. NaHSO3
- D. Na2SO4
A concentrated solution containing H+, Cu2+, OH- and Cl- was electrolyzed using platinum electrodes.
The ion that will be discharged at the cathode is?
- A. Cu2+
- B. Cl-
- C. H+
- D. OH-
2H2 + O22 → H2+O ΔH = -571kJ
In the equation above, how much heat will be liberated if 12.0g of hydrogen is burnt in excess oxygen?
- A. -1142 kJ
- B. -571 kJ
- C. +1142 kJ
- D. -1713 kJ
In which of the following reactions can the oxidation number of the nitrogen be said to have increased?
- A. 2NO(g) + O2(g) → 2NO2(g)
- B. 2NO(g) + Cl2(g) → 2NOCl(l)
- C. FeSO4(aq) + NO(g) → Fe(NO)SO4(s)
- D. NO(g) + Br2(l) → 2NOBr(l)
When iron is exposed to moisture and it rusts, the value of ΔG for the reaction is
- A. neutral
- B. zero
- C. positive
- D. negative
Phenolphthalein in acidic solution is
- A. red
- B. orange
- C. colourless
- D. yellow
Which of the following ions require the largest quantity of electricity for discharge at an electrode?
- A. 4.0 moles of Cl-
- B. 3.0 moles of Na+
- C. 2.5 moles of Cu2+
- D. 2.0 moles of Al3+
Which of the following equimolar solutions will have the highest pH?
- A. CH3COOHa
- B. NaOH
- C. HCl
- D. NH4OH
In the production of soap, concentrated sodium chloride solution is added to
- A. Increase the solubility of soap
- B. Decrease the solubility of the soap
- C. Saponify the soap
- D. Emulsify the soap
Alkanol + Alkanoic ↔ Ester + Water
The reverse reaction above is known as
- A. Hydrolysis
- B. Saponification
- C. Hydration
- D. Fermentation
C\(_2\)H\(_5\)OH(aq) → Y
If the above reaction takes place in conc. H\(_2\)SO\(_4\) at 180\(^0\)C, Y represents
- A. CH4
- B. C2H5COOH
- C. C2H4
- D. CH3OCH3
CH3COOH(g) → CH\(_4\)(g) + CO\(_2\)(g)
The reaction above is
- A. Carboxylation
- B. Decarboxylation
- C. Acidification
- D. Esterification
Vulcanization involves the removal of
- A. A monomer
- B. The single bond
- C. The double bond
- D. A polymer
Which of these reagents can confirm the presence of a triple bond?
- A. Bromine water
- B. Acidified KMnO4
- C. Copper (I) chloride
- D. Bromine gas
A characteristic of the alkane family is
- A. Addition reaction
- B. Elimination reaction
- C. Substitution reaction
- D. Neutralization reaction
An isomer of C\(_5\)H\(_{12}\) is
- A. Butane
- B. 2 – methylbutane
- C. 2 – methylpropane
- D. 2 – ethylbutane
The alkyl group can be represented by the general formula
- A. CnH2n+1
- B. CnH2n
- C. CnH2n+2
- D. CnH2n-2
Oxyacetylene flame is used for iron-welding because it
- A. Makes the iron metals solidify very quickly
- B. Combines with oxygen to give a pop sound
- C. Evolves a lot of heat when burnt
- D. Dissociates to produce carbon (IV) oxide and oxygen
Sodium metal is always kept under oil because it
- A. Readily reacts with water
- B. Is reduced by atmospheric nitrogen
- C. Reacts vigorously on exposure to air
- D. Reacts with oxygen and carbon (IV) oxide