The amount of Faraday required to discharge 4.5 moles of Al\(^{3+}\) is
- A. 13.5
- B. 4.5
- C. 7.5
- D. 1.5
An organic compound with general formula RCOR’ is an
- A. alkanone
- B. alkanal
- C. alkanoate
- D. alkanoic acid
The hybridization scheme in ethyne is
- A. sp
- B. sp\(^3\)
- C. sp\(^2\)d
- D. sp\(^2\)s
C\(_2\)H\(_{4(g)}\) + 3O\(_{2(g)}\) → 2CO\(_{2(g)}\) + 2H\(_2\)O\(_{(g)}\)
The above equation represents the combustion of ethene.If 10cm\(^3\) of ethene is burnt in 50cm\(^3\) of oxygen, what would be the volume of oxygen that would remain at the end of the reaction?
- A. 20cm\(^3\)
- B. 40cm\(^3\)
- C. 60cm\(^3\)
- D. 50cm\(^3\)
In a chemical reaction, surface area of reactants can affect
- A. CaCO\(_3\) + 2HCl → CaCl\(_2\) + H\(_2\)O + CO\(_2\)
- B. MgCl\(_2\) + H\(_2\)SO\(_4\) → MgSO\(_4\) + 2HCl
- C. H\(_2\) + Cl\(_2\) → 2HCl
- D. NaOH + HCl → NaCl + H\(_2\)O
An oxide of nitrogen that can rekindle a glowing splint is
- A. nitrogen(I)oxide
- B. nitrogen(II)oxide
- C. nitrogen(IV)oxide
- D. dinitrogen tetraoxide
Which of the following represents an order of increasing reactivity?
- A. Au < Cu < Sn < Fe < Ca
- B. Ca < Fe < Sn < Cu < Au
- C. Au < Cu < Fe < Sn < Ca
- D. Ca < Sn < Fe < Cu < Au
The main constituent of water-glass is
- A. calcium trioxosilicate(IV)
- B. calcium trioxosulphate(IV)
- C. sodium trioxosulphate(IV)
- D. sodium trioxosilicate(IV)
The term strong and weak acids is used to indicate the
- A. number of H\(^+\) released by an acid
- B. number of OH\(^-\) released by an acid
- C. extent of ionization of an acid
- D. strength of its action on substance
The reaction of hydrogen and chlorine to produce hydrogen chloride gas is explosive in
- A. diffused light
- B. sunlight
- C. infrared light
- D. Raman light
The electronic configuration of an atom of Nitrogen is 1s\(^2\) 2s\(^2\) 2p\(^1_x\) 2p\(^1_y\) 2p\(^1_z\) because the atom is
- A. in an excited state
- B. undergoing energy changes
- C. unstable and ready to combine with another
- D. simply obeying rules governing electron configuration
The Van der waals forces of attraction operates between
- A. atoms
- B. cations
- C. molecules
- D. anions
If 11.0g of a gas occupies 5.6 dm\(^3\) at s.t.p., calculate its vapour density (1 mole of a gas occupies 22.4 dm\(^3\)).
- A. 22
- B. 44
- C. 66
- D. 88
Solubility curve is a plot of solubility against
- A. temperature
- B. pressure
- C. volume
- D. concentrate
Nitrogen obtained from air is not absolutely pure because it contains the following except
- A. oxygen
- B. carbon (IV)oxide
- C. inert gases
- D. water vapour
The indicator used in a titration between strong acid and weak base is
- A. methyl orange
- B. phenolphthalein
- C. bromothymol blue
- D. methyl red
A typical chemical reaction will be spontaneous if
- A. enthalpy change is negative
- B. free energy change is greater than one
- C. entropy change is zero
- D. enthalpy and free energy change are equal
Kerosene is used as solvent for
- A. Paints
- B. Sulphur
- C. Gums
- D. Fats
The term that is not associated with petroleum industry is ?
- A. Cracking
- B. Saponification
- C. Polymerization
- D. Fermentation
An example of an amphoteric oxide is
- A. P\(_4\)O\(_{10}\)
- B. Al\(_2\)O\(_3\)
- C. CuO
- D. K\(_2\)O
The IUPAC nomenclature of the complex K\(_4\)Fe(CN)\(_6\) is
- A. potassium hexacyanoferrate(II)
- B. potassium hexacyanoferrate(III)
- C. potassium hexacyanoferrate(IV)
- D. potassium hexacyanoferrate(VI)