🔬 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 terminal velocity of falling droplet is proportional to ……….Answer: Radius In damped oscillations amplitude …………… with timeAnswer: Decreases Speed of sound is maximum in ……….. (air, glass, water, iron).Answer: Iron The phenomenon that best explains the transverse nature of light is …………(reflection ,refraction , diffraction, polarization).Answer: Polarization The critical angle is such angle of incidence for which angle of refraction is …………Answer: 90° The formula for heating effect of current is……..Answer: H=I₂Rt To accurate locate a microscopic particle one must use light wave of ………….Answer: Short wavelength Velocity of an electron in an orbit is …………… to its principal quantum number.Answer: Inversely proportional Electrons emit photons when they jump from………Answer: Higher energy level to lower energy level If a body is moving in a circular motion with constant speed then the it has got the constant ………….Answer: Kinetic energy Magnetic flux is maximum when conductor is placed at an angle of …………… to magnetic field.Answer: 90° Power dissipated in a pure inductor circuit is ……….Answer: Zero Which one is not the unit of mass …………….. (gram, kg, dyne, slug).Answer: Dyne In chromatography the rates of solute is determined by the ……………Answer: Distribution coefficient Graham’s gas law is concerned with ………….Answer: Diffusion and effusion of gases The standard temperature and pressure conditions are ………….Answer: 0°C and 1 atm Spreading of a scent of rose is due to process of …………..Answer: Diffusion Lowest possible principal quantum number is …………..Answer: 1 Which one of following is non-polar molecule ………….Answer: CH₄ H∆ is always negative for ……………… reactions.Answer: Exothermic reactions Dust particles in air are example of a mixture of type ………………Answer: Suspension The difference of BP’s of substances of a mixture is utilized in the separation technique of ……………Answer: Fractional distillation The solubility depends on …………..Answer: Nature of solute and solvent Which one of following belong to group IV-A ( Pb, Sb, Ba, Fe)Answer: Pb The highest ionization energy in 5th group is of ………….Answer: Nitrogen (N) The catalyst used to convert SO₂ to SO₃ is ………………….Answer: Vanadium(V) oxide (V₂O₅) When gypsum loses ¾ of water then the hemihydrate formed has formula ………….Answer: CaSO₄·½H₂O Down cell is used to prepare…………Answer: Sodium metal Aqua regia consists of ………..Answer: 3 parts HCl + 1 part HNO₃ H₄P₂O₇ is the formula of …………..Answer: Pyrophosphoric acid