The IUPAC nomenclature of the compound above is
- A. 2-ethylpentane
- B. 3,4-dimethylhexane
- C. 2,3-dimethylhexane
- D. 2-ethylhexane
In the experiment above, X is a mixture of nitrogen, carbon (IV) oxide and
- A. water
- B. impurities
- C. inert gas
- D. oxygen
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
Transition metals possess variable oxidation states because they have
- A. Electrons in the d orbitals
- B. Electron in the s orbitals
- C. A variable number of electrons in the p orbitals
- D. Partially filled p orbitals
Alloys are best prepared by
- A. Electroplating
- B. Arc-welding
- C. Reducing and mixture of their metallic oxide
- D. Cooling a molten mixture of the metals
Aluminium hydroxide is used in the dyeing industry as a
- A. Salt
- B. Dye
- C. Mordant
- D. Dispersant
Carbon is tetravalent because
- A. The electrons in both the 2s and 2p orbitals are equivalent
- B. The electrons in all the orbitals of carbon are equivalent
- C. The 2s and 2p atomic orbitals hybridize
- D. All the atomic orbitals of carbon hybridize
Sulphur (IV) oxide bleaches by
- A. Reduction
- B. Oxidation
- C. Hydration
- D. Adsorption
When steam is passed over red-hot carbon, the substances produced are
- A. Hydrogen and trioxocarbonate (IV) acid
- B. Hydrogen, oxygen and carbon (IV) oxide
- C. Hydrogen and carbon (II) oxide
- D. Hydrogen and carbon (IV) oxide
Which of the following gases can be collected by the method of downward delivery?
- A. Chlorine
- B. Oxygen
- C. Ammonia
- D. Hydrogen
The allotrope of carbon used in the decolourization of sugar is
- A. Graphite
- B. Soot
- C. Charcoal
- D. Lampblack