🔬 General Science Solved MCQs with Answers

Practice 4010 approved 🔬 General Science questions with verified answers from the 🌐 Current Affairs & GK subject for Pakistan exams.

4010 solved MCQs

The red pigment in blood cells is called _____?Answer: Hemoglobin Which of following minerals is found in almost all the rocks?Answer: Feldspar When temperature exceeds ______ °C, it is thought to be hot.Answer: 27 To be mentally healthy, people must have self-respect. People can maintain self-respect only by continually eaming the respect of others they esteem. They can earn this respect only by treating these others morally. 1. Which of the following conclusions can be properly drawn from the statements above?Answer: People can expect to be treated morally by others only if they esteem these others. Which radiation consists of high-speed electrons emitted from the nucleus?Answer: Beta rays An intrinsic semiconductor doped with phosphorus (Group V element) becomes?Answer: N-type semiconductor The Hall Effect is used to determine?Answer: All of these In an isothermal process for an ideal gas?Answer: Heat entering the system equals work done by the system According to Heisenberg’s Uncertainty Principle, if Δx is halved, what happens to minimum Δp?Answer: Doubles Copper and glass rods of the same length and same temperature difference are compared under steady heat flow. Which one transfers energy faster?Answer: Copper For an ideal gas, internal energy depends only on?Answer: Temperature In beta minus (β⁻) decay, the atomic number (Z)?Answer: Increases by 1 An electron is accelerated through a potential difference of 150 V. Its kinetic energy gained is?Answer: Both Work done by an external agent to move a charge along an equipotential surface is?Answer: Zero In electrostatic equilibrium, the electric field inside a conductor is?Answer: Zero Two lenses of power +2 D and −5 D are connected in parallel. What is their equivalent focal length?Answer: Both A black body's temperature doubles from 400 K to 800 K. The radiated energy becomes?Answer: 16 times A constant force of 6 N acts on a 2 kg mass starting from rest for 3 seconds. The distance covered is?Answer: 13.5 m A +q charge is placed at −a on the x-axis and a −q charge is placed at +a on the x-axis. The electric field at the midpoint is directed?Answer: +x axis If C₁ = 2 μF, C₂ = 3 μF are connected in series and this combination is connected in parallel with C₃ = 5 μF, what is the total capacitance?Answer: 6.2 μF Electric potential at a distance r from a point charge +Q is?Answer: kQ/r Which phenomenon can a transverse wave undergo that a longitudinal wave cannot?Answer: Polarization In an irreversible process, what happens to the entropy of an isolated system?Answer: Increases A heat engine absorbs 600 J of heat and rejects 420 J. What is its efficiency?Answer: 30% What is the molar specific heat at constant volume (Cᵥ) for a monatomic ideal gas?Answer: 3/2R What is the time period of a satellite orbiting close to Earth's surface?Answer: T = 2π√R/g How are stationary (standing) waves formed?Answer: By superposition of two waves of same frequency and amplitude traveling in opposite directions In Young’s double slit experiment, if slit separation is doubled, what happens to fringe spacing?Answer: Halves Due to a central force, which quantity remains conserved?Answer: Angular momentum What is the relationship between orbital speed (v₀) and escape velocity (vₑ) near Earth’s surface?Answer: Vₑ = √2 v₀