🔬 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

Which of the following is an organ-metallic compound?Answer: Pb(C₆H₅)₂ A system attains equilibrium when ΔG° in _____?Answer: Zero In analysts are measuring chloride contents in water in four different laboratories. If known (accepted) value of chloride is 105 mg/L then results obtained in ______ laboratory have low accuracy and high precision.Answer: 85.8mg/L, 86.7mg/L, 88.85mg/L, 87mg/L Which one among the pairs cannot be separated by H²S in dilute HCl?Answer: Cu₂+, Zn₂+ The source of electromagnetic radiation which is used in the instrument atomic absorptions spectrophotometer is _____?Answer: Hallow cathode lamp All of the following statistics reflect family violence except:Answer: All of these When a nucleophilicity of a nucleophile, joined to an atom is found greater than expected is known as _____ effect?Answer: Alpha Which of the following bonds would show the strongest absorption in the IR?Answer: Oxygen-hydrogen Which one of the following has no dipole moment?Answer: Trans-1,2-Dichloroethene What would be the transmittance reading on a spectrophotometer at 0.25 absorbance?Answer: 0.56 T When H^+ ion concentration of solution in 1 × 10^-8 pH of that solution will be _____?Answer: 8 If gram molecular weight of gas is 32g its density will be _______?Answer: 1.43 g/L When ethanamide is treated with phosphorus pentoxide it forms?Answer: Methyl cyanide Axial lengths and inter-axial angles of a unit cell of crystals are known as _____?Answer: Lattice constants Bohr model defines angular momentum as 1= nh/2π, but in Schrodinger wave mechanics it is ______?Answer: √l(l + 1) h/2π The value of gas constant R in ergs mol⁻¹K⁻¹ is _____?Answer: 8.314 × 10⁷ The best method for preventing the problem of prevalence of acute diarrhea is:Answer: Use of boiled water Which of the following atoms has the largest diameter?Answer: I Order of reaction is defined as _______?Answer: Power of concentration terms in the rate law equation Which of the following is completely amorphous?Answer: Glass fiber The Vulcanization of rubber ______?Answer: Converts its plasticity into elasticity Which of the bonds shown by a dash --- has the greatest polarity?Answer: H ----- F The atom formed by the beta decay of carbon-14 is _____?Answer: Nitrogen-14 What is the oxidation number of nitrogen in the molecule N2?Answer: 0 The mass and diameter of a planet are twice those of earth. The period of oscillation of pendulum planet will be (if it is a second's pendulum on earth)?Answer: 2√2 seconds A Carnot engine whose sink is at 300K has an efficiency of 40%. By how much should the temperature source be increased so as to increase its efficiency by 50% of original efficiency?Answer: 250K In a dipole, the Gauss theorem value will be _____?Answer: 0 A well was present in a rural area where an unsanitary bore-hole latrine with lots of flies was present within 10 feet of distance. The disease more likely to be transmitted through drinking this well water will be:Answer: Typhoid A cubical block rests on an incline plane of μ = 1/√3. Determine the angle of inclination when the block just slides down the inclined plane?Answer: 30° A photon of energy 4.1 MeV is incident on a lead nucleus, causing the creation of electron-positron pair. They travel perpendicular to the initial direction of the photon. The energy of the electron is?Answer: 2.05 MeV