Experimental and Lab-based
Apparatus identification, observation interpretation, lab procedure questions.
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Take a full mock →Q1 · Experimental and Lab-based · EASY
A student is conducting an experiment to verify Ohm's law. She sets up a circuit with a resistor, ammeter, voltmeter, battery, rheostat and a key. To get multiple readings of current and voltage, which component should be adjusted?
Q2 · Experimental and Lab-based · MEDIUM
During a laboratory activity to study the action of salivary amylase on starch, a student sets up three test tubes: Test tube A contains starch solution + saliva at 37°C, Test tube B contains starch solution + saliva at 0°C, Test tube C contains starch solution + boiled saliva at 37°C. After 30 minutes, iodine solution is added to all tubes. Which test tube(s) will show blue-black colour with iodine?
Q3 · Experimental and Lab-based · MEDIUM
In an experiment to test the effect of fertilizer on plant growth, a student uses three identical pots with the same soil and plants. Pot A receives no fertilizer, Pot B receives 5g fertilizer, and Pot C receives 10g fertilizer. All pots are placed in different locations with varying light. What is the major flaw in this experimental design?
Q4 · Experimental and Lab-based · EASY
A student wants to determine which type of soil (sand, clay, or loam) retains water best. What should be measured after pouring equal amounts of water into each soil sample?
Q5 · Experimental and Lab-based · MEDIUM
A student conducts an experiment to test the effect of light intensity on the rate of photosynthesis in aquatic plants. She places the plant at three different distances from a light source: 10 cm, 20 cm, and 30 cm. Which of the following would be the MOST appropriate method to measure the rate of photosynthesis?