Which of the following metals exists as liquid at ordinary temperature?
- A. Copper
- B. Gold
- C. Mercury
- D. Silver
Which of the following substances cannot be classified as a heavy chemical?
- A. AgNO3
- B. CaO
- C. CaOCI2
- D. H2SO4
The main function of limestone in the blast furnance is to
- A. act as a reducing agent
- B. act as a catalyst
- C. remove impurities
- D. supply carbon (IV) oxide
Compound N reacts with sodium metal to produce a gas that gives a ‘pop’ sound with a burning splint N also react with ethanoic acid to give a sweet smelling liquid. Compound N is an
- A. alkanol
- B. alkanoate
- C. alkane
- D. alkanoic acid
An organic compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen. What is the empirical formula of the compound? [O = 16.0, C = 12.0, H = 1.0]
- A. C2HO
- B. CHO
- C. CH2O
- D. CHO2
The IUPAC name of C2H6COOC2,/sub>H6 is
- A. ethyethanoate
- B. ethylproanoate
- C. propylethanoate
- D. propylpropanoate
The products of fermentation of sugar are
- A. carbon(IV) oxide and water
- B. ethanol and carbon (IV) oxide
- C. ethanol and water
- D. ethanol and enzymes
An advantage of detergent over soap is that detergents
- A. are readily available
- B. are in powerdered from
- C. are non-biodegradable
- D. lather readily with water
Fact and oils are used as raw materials in the following industries except
- A. paint industry
- B. plastic industry
- C. margarine industry
- D. cosmetics industry
The quantity of electricity required to discharge 1 mole of univalent ion is
- A. 9,600 C
- B. 48,250 C
- C. 96,500 C
- D. 193,00 C
What is the change in oxidation number of manganes in the reaction represented by the following equation? MnO–4(aq) + 8H+(aq) + 5e– → Mn2+(aq) + 4H2O(l)
- A. +3 to + 2
- B. + 4 to + 2
- C. + 5 to + 2
- D. + 7 to 2
Which of the following statements about the electrolysis of CuSO4(aq) using copper cathode and platinum anode is not correct?
- A. Copper is deposited at the cathode
- B. Oxygen is liberated at the anode
- C. it is used for the purification of copper
- D. The solution becomes acidic
Which of the following statements about the cell notation Mg/Mg2+//Cu2+/Cu is correct?
- A. copper is the anode
- B. Manesium is reduced
- C. Magnesium is the anode
- D. The double line represents the electrodes
The rate of chemical reaction of solids are not affected by
- A. catalyst
- B. pressure
- C. particle size
- D. temperature
Consider the equilibrium reaction represented by the following equation: 2SO2(g) + O2(g) ⇌ 2SO3(g); ∆H = 395.7 kJmol-1 Which of the following statements about the equilibrium system is correct?
- A. Addition of catalyst changes the equailibrium position
- B. Decrease in pressure increase in temperature SO3
- C. Decrease in pressure increases the equilibrium concentration of O2
- D. Increase in temperatur favours the forward reaction
Which of the following factors would not affect the solubility of a gas?
- A. Concentration
- B. Nature of solvent
- C. Pressure
- D. Temperature
Which of the following chlorides is insoluble in water?
- A. AgCI
- B. KCI
- C. NH4CI
- D. ZnCI2
The following substances are normal salts except
- A. AI(NO3)3
- B. FeSO4
- C. Mg(OH)NO3
- D. NaCI
Which of the following equimolar solutions would have the highest conductivity?
- A. NH4NO3(aq)
- B. NaNO3(aq)
- C. Mg(NO3)2(aq)
- D. AI(NO3)3(aq)
Which of the following oxides is basic?
- A. NO2
- B. AI2O3
- C. SO2
- D. CaO
The minimum amount of energy required for effective collisions between reacting particles is known as
- A. activation energy
- B. bond energy
- C. kinetic energy
- D. potential energy