PRACTICE TEST

Mixed practice

10 questions · single correct answer · +1 correct, 0 incorrect/unanswered. Suggested time: 20 minutes. Practice scoring, not an official exam marking scheme.

Guest attempt: results are shown after submission but are not saved to an account.

Question 1 · Physics · Current electricity

A 6 Ω resistor carries 2 A. The potential difference across it is:

A. 3 VB. 8 VC. 12 VD. 24 V

Question 2 · Physics · Current electricity

Two resistors of 3 Ω and 6 Ω are connected in parallel. Their equivalent resistance is:

A. 2 ΩB. 3 ΩC. 9 ΩD. 18 Ω

Question 3 · Physics · Electrostatics

If the separation between two point charges is doubled, the electrostatic force becomes:

A. Twice as largeB. Half as largeC. One-fourth as largeD. Four times as large

Question 4 · Physics · Electrostatics

The SI unit of capacitance is:

A. OhmB. FaradC. TeslaD. Weber

Question 5 · Chemistry · Solutions

An ideal solution obeys:

A. Raoult’s law over the entire composition rangeB. Only Boyle’s lawC. Only the law of multiple proportionsD. No vapour-pressure relationship

Question 6 · Chemistry · Solutions

Which concentration unit is independent of temperature for a fixed solution composition?

A. MolarityB. MolalityC. Mass per litreD. Moles per cubic metre

Question 7 · Chemistry · Chemical kinetics

The unit of the rate constant for a first-order reaction is:

A. mol L⁻¹ s⁻¹B. L mol⁻¹ s⁻¹C. s⁻¹D. mol² L⁻² s⁻¹

Question 8 · Chemistry · Chemical kinetics

For a first-order reaction, the half-life is:

A. Proportional to initial concentrationB. Inversely proportional to initial concentrationC. Independent of initial concentrationD. Always one second

Question 9 · Biology · Genetics

In a monohybrid cross Aa × Aa, the expected genotype ratio is:

A. 1:1B. 3:1C. 1:2:1D. 9:3:3:1

Question 10 · Biology · Genetics

In DNA, adenine normally pairs with:

A. UracilB. GuanineC. CytosineD. Thymine