Quiz: Excretion State the name of the gas excreted through the lungs and write the balanced chemical equation for its production during cellular respiration. What are the two main regions of the kidney? Describe their functions. Explain how urea is produced in the human body. Include a chemical equation. Describe the process of deamination. How does it relate to urea formation? Outline the steps involved in urine formation within a nephron. ...
Physics Quiz: P6- Electrical Circuits Time allowed: 60 minutes Total marks: 50 Section A: Multiple Choice Questions (MCQ) [10 marks] An ammeter is used to measure which electrical quantity? [1] A) Potential difference (p.d.) B) Current C) Resistance D) Power What is the correct circuit position for a fuse in relation to the live wire? [1] A) In parallel with the live wire B) In series before the appliance, on the live wire C) In series after the appliance, on the neutral wire D) Connected directly to earth ...
Electrochemistry Quiz Duration: 45 Minutes Total Marks: 30 Section A: Multiple Choice (5 Marks) In an electrolytic cell, the electrode where oxidation occurs is the: A. Cathode (negative) B. Cathode (positive) C. Anode (negative) D. Anode (positive) What is the observation at the anode during the electrolysis of molten lead(II) bromide ($\text{PbBr}_2$)? A. Grey metallic deposit B. Colorless bubbles of gas C. Reddish-brown fumes D. Pale green gas Which of the following is correct for the electrolysis of concentrated aqueous sodium chloride ($\text{NaCl}$)? A. Sodium metal forms at the cathode. B. Hydrogen gas forms at the cathode. C. Oxygen gas forms at the anode. D. Chlorine gas forms at the cathode. ...
Stoichiometry Quiz Duration: 45 Minutes Total Marks: 30 Section A: Multiple Choice (5 Marks) What is the relative formula mass ($M_r$) of $\text{Ca(OH)}_2$? ($A_r$: $\text{Ca} = 40, \text{O} = 16, \text{H} = 1$) A. 58 B. 74 C. 82 D. 90 Which of the following represents the correct molar gas volume at r.t.p.? A. 1 mole = $22.4\text{ dm}^3$ B. 1 mole = $24\text{ dm}^3$ C. 1 mole = $24,000\text{ cm}^3$ D. Both B and C ...
Physics Quiz: Electricity Time allowed: 45 minutes Total marks: 30 Section A: Multiple Choice Which particle is the primary carrier of negative charge in metals? a) Protons b) Neutrons c) Electrons d) Ions What is the value of the elementary charge (e)? a) $1.6 \times 10^{-19}\text{ C}$ b) $1.6 \times 10^{19}\text{ C}$ c) $6.25 \times 10^{-18}\text{ C}$ d) $1.0 \times 10^{-19}\text{ C}$ In an electric field, field lines are drawn from: a) Negative to positive b) Positive to negative c) Center to periphery d) North to south Which of the following increases the resistance of a wire? a) Increasing the cross-sectional area b) Decreasing the length c) Decreasing the temperature d) Increasing the length The rate of flow of electric charge is called: a) Voltage b) Resistance c) Current d) Power Conventional current flows in which direction? a) Negative terminal to positive terminal b) Positive terminal to negative terminal c) From higher resistance to lower resistance d) Randomly in all directions Section B: Short Answer Answer the following questions in the space provided. Marks are indicated in brackets. ...