Q1. Figure 1 shows how some animals with hooves are classified. To which phylum does the white rhino belong?
1. Chordata
2. Mammalia
3. Perissodactyla
4. Rhinocerotidae
Q2: Calculate the volume of water that would have to pass over the gills each hour to supply the oxygen required by the fish in dm3.
1. 5.14
2. 1575
3. 36
4. 0.03
Q3: In birds, males are XX and females are XY. Use this information to explain why recessive, sex-linked characteristics are more common in female birds than in male birds.
1. Recessive allele is always expressed in males
2. Females could have dominant and recessive alleles
3. Males need two recessive alleles
4. Male chromosomes are more febrile
Q4. Give the meaning of the term dynamic in the context of a dynamic equilibrium.
1. Forward and reverse reactions occur at different times
2. Forward and reverse reactions occur at diametrically opposite times
3. Forward and reverse reactions occur at the same time
4. Forward and reverse reactions never occur at the same time
Q5: A 2.0 mol sample of E was heated in a sealed container with a 1.0 mol sample of F. Equilibrium was established at a given temperature and the equilibrium mixture formed contained 0.80 mol of G. Calculate the amount, in moles, of E and of F in this equilibrium mixture.
1. E: 1.6 F: 0.2
2. F: 1.6 E: 0.2
3. F: 16 E: 2
4. E: 16 F: 2
Q6: When, in the absence of air, magnesium is heated strongly with water vapour at temperatures above 373 K what is the equation for the reaction that occurs.
1. Mg + H2O → MgH2 + O
2. MgO + Mg → Mg + H2O
3. H2 + H2O → MgO + Mg
4. Mg + H2O → MgO + H2
Q7: State and the direction of the electrostatic force on the ion.
1. Towards direction of field lines
2. In opposite direction to field lines
3. At 45 degrees clockwise to field lines
4. Perpendicular to field lines
Q8: Name the two types of potential energy involved when a mass–spring system performs vertical simple harmonic oscillations.
1. Kinetic potential energy and vertical potential energy
2. Kinetic potential energy and elastic potential energy
3. Harmonic potential energy and vertical potential energy
4. Gravitational potential energy and elastic potential energy
Q9. State the time period of the simple harmonic oscillations that produces the energy–time graph shown in Figure 3.
1. 0.2s
2. 0.4s
3. 0.8s
4. 1s
