Which of the following is a waste product in the Solvary Process for the manufacture of sodium trioxocarbonate (IV)?
- A. Ammonium chloride
- B. Brine
- C. Limestone
- D. Calcium oxide
- E. Calcium chloride
Which of the following correctly explains why iodine crystals change directly into the gaseous state when heated?
- A. lodine crystals sublime
- B. lodine atoms are held together by strong forces
- C. lodine molecules are held together by weak forces
- D. lodine molecules are covalent
- E. lodine is a solid at room temperature
Aqueous sodium trioxocarbonate (IV) solution is alkaline because
- A. acid from which it is formed is strong
- B. sodium is an alkali metal
- C. sodium trioxocarbonate (IV) is decomposed by water
- D. sodium trioxocarbonate (lV) is stable to heat
- E. sodium triocarbonate (IV) is hydrolysed in water
Which of the following equations represents the reaction of chlorine with hot concentrated sodium hydroxide solution?
- A. 2NaOH+CI2 → NaCIO + NaCI + H2O
- B. 4NaOH + 2CI → 4NaCI + 2H2O + O2
- C. 6NaOH + 3CI2 → NaCIO3 + 5NaCI + 3H2O
- D. 2NaOH + CI2 → 2NaCI + H2O2
- E. NaOH + 2CI2 + H2O → NaCI + 3HCI + O2
Which of the following is not a naturally occurring iron ore?
- A. FeCl2
- B. Fe2O3O3
- C. Fe2O3
- D. FeCO3
- E. FeS2
Which of the following metals cannot extracted from its ore by using carbon (ll) oxide as the reducing agent?
- A. Cu
- B. Zn
- C. Al
- D. Pb
- E. Fe
Water gas is a mixture of?
- A. CO2 and H2
- B. CO and H2O
- C. CO2 and CO
- D. CO and N2
- E. CO and H2
How many isomers can be obtained from C4H10?
- A. o
- B. 1
- C. 2
- D. 3
- E. 4
What volume of oxygen will be left unreacted when a mixture of 100cm3 of hydrogen and 200cm,sup>3,/sup> of oxygen are exploded in a eudiometer?
- A. 300cm3
- B. 200cm3
- C. 150cm3
- D. 100cm3
- E. 50cm3
Which of the following is not true of the rusting of iron?
- A. Rusting is a reduction process
- B. Rusting of iron takes place in the presence of oxygen and moisture
- C. the rust formed is reddish brown
- D. the major constituent of rust is hydrated iron (lll) oxide
- E. rusting is similar to burning
Which of the following is not true of the rusting of iron?
- A. Rusting is a reduction process
- B. Rusting of iron takes place in the presence of oxygen and moisture
- C. the rust formed is reddish brown
- D. the major constituent of rust is hydrated iron (lll) oxide
- E. rusting is similar to burning
Which of the following is not decomposed by heat?
- A. CaCO3
- B. CuCO3
- C. ZnCO,sub>3
- D. Na2CO3
- E. MgCO3
Bubbling of carbon (IV)oxide into calcium hydroxide solution results in the formation of
- A. CaCO3
- B. CuCO3
- C. ZnCO,sub>3
- D. Na2CO3
- E. MgCO3
What quantity of silver is deposited when 96500C of electricity is passed through a solution containing silver ions? (Ag = 108, 1F = 96500C)
- A. 1.08g
- B. 40g
- C. 10,.8g
- D. 21.6g
- E. 108g
The following are heavy chemicals except
- A. tetraoxosulphate (IV) acid
- B. caustic soda
- C. sodium trioxocarbonate (IV)
- D. ethene
- E. dyes
The main characteristic feature of transition metals is that they
- A. have the same atomic size
- B. are reducing agents
- C. from ions easily
- D. have variable oxidation states
- E. are highly electropositive
The following are uses of radioactive isotopes except for
- A. sterilization of medical equipment
- B. tracing reaction paths
- C. dating elements
- D. radiography
- E. determining equilibrum positions
Which of the following statements is not correct?
- A. Carbon exhibits allotropy
- B. Sulphur exhibits allotropy
- C. Chlorine exhibits allotopy
- D. Nitrogen is a gas
- E. Argon is a noble gas
Which of the following is a neutral oxide?
- A. Nitrogen (IV0 oxide
- B. Carbon (IV) oxide
- C. Sulphur (IV) oxide
- D. Phodphoorus (IV) oxide
- E. Nitrogen oxide
Which of the following types of hybridization gives rise to tetrahedral molecules?
- A. sp
- B. sp2
- C. sp3
- D. sp3d
- E. sp3d2
Which of the following is used as an anaesthetic?
- A. CHI3
- B. CHCI3
- C. CH3OH
- D. C2H5OH
- E. CHBr3