🔬 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

Molar heat of vaporization of water isAnswer: 40.7 kJ/mol The direction of induced current is determined by?Answer: Lenz’s law ∆H can be measured indirectly by applyingAnswer: Hess’s law Which element has the electronic configuration of noble-gas notation [Kr], 5s2 , 4d2Answer: Zr The splitting of spectral lines in magnetic field isAnswer: Zeeman effect Most of the neurons in the CNS are?Answer: Multipolar A ball is kicked horizontally from the top of a 10m high cliff with an initial speed of 15m/s. After 2 seconds, which of the following statement describes the ball’s horizontal and vertical components?Answer: The horizontal velocity is 15m/s while vertical velocity is 20m/s downward The outer layer of uterus is called as:Answer: Perimetrium The acidity of urine is neutralized by?Answer: Cowpers gland Sugarcane contains _________.Answer: Sucrose _______ is the natural tendency of an object to remain at rest or in motion with constant velocity?Answer: Inertia Consider N₂ + 3H₂(g) 2NH₃(g) ∆H= -92.46kJ/mol The optimum temperature ( oC), to produce ammonia isAnswer: 450 Two points charges, +5µC and -5µC are placed at points A and B, respectively, which are separated by a distance 2d. What is the electric potential at the midpoint M of the line joining A and B?Answer: zero When 1 mole of ice melts at 0oC and constant pressure of 1 atmosphere, 6025 J of heat is absorbed by the system. The molar volume of ice and water are 0.020 and 0.018 dm3 , respectively. Calculate ∆E. (1dm3 .atm=101.33J)Answer: 6025.20J What is the increase in force between two charges if the separation between them is decreased by 50 percent?Answer: Becomes four times If the dielectric material between the plates of the capacitor is removed, what happens to the electric field between the plates?Answer: The electric field increases A nurse is pushing a wheelchair with an 80kg patient sitting on it. How much work is done by the patient’s weight?Answer: No work Temperature coefficient of resistance is defined as increase in resistance per ohm original resistance per ___?Answer: Degree rise in temperature Calculate the work done when 1 mole of an ideal gas expands from 15 dm3 to 20 dm3 against a constant external pressure of 2 atmospheres.Answer: -10 atm.dm3 A reaction is first order with respect to A and second order with respect to B, the rate equation isAnswer: Rate = k [A][B]2 Chili contain which vitamin?Answer: Vitamin C What is another name for the second law of motion?Answer: Law of Acceleration Which one of the following molecules has a pyramidal structure?Answer: NH₃ Deficiency of Vitamin E causes _____?Answer: Sterility Sickle cell anaemia results from?Answer: Single amino acid substitution in the haemoglobin molecule The momentum of moving photon is:Answer: h / λ Electron Volt (eV) is another unit ofAnswer: Energy Which of the following has the highest boiling point? ethyl alcohol, isopropyl alcohol ,n-propyl alcohol ,tert-butyl alcoholAnswer: n-propyl alcohol Cu2+ salt solution is blue in colour due to transition of electrons fromAnswer: d to d orbital The production of energy is____________.Answer: Faster in anaerobic respiration