🔬 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

In the absence of external torque, the quantity which remains conserved is _____?Answer: Angular momentum Divergence of a vector at a point in a vector field is _____ quantity.Answer: A scalar A catalyst ______?Answer: Alters the reaction mechanism Phenols are not having ______?Answer: Carbonyl group The velocity of em waves is ______?Answer: 3 × 10⁸ m/s Which of the following chemical is used for preparation of artificial flavors and essences?Answer: Ethyl acetate The general formula for alkanes, (CnH₂n+₂) + 2, stands for ______?Answer: 2 hydrogen atoms Methane is the ______?Answer: Simplest organic compound For an exothermic reaction the sign of enthalpy will be ______?Answer: Negative Which isotope of hydrogen is radioactive?Answer: Tritium Which one of the following units represents the largest amount of energy?Answer: Calorie The melting point of mercury is ______?Answer: -39°C Slight oxidation of a primary alcohol gives ______?Answer: An aldehyde Which device is used as a particle accelerator?Answer: Cyclotron An atom of Iron is ______ times as heavy as atom of hydrogen.Answer: 55 Acid base reaction is an ______?Answer: Exothermic reaction An equilibrium constant of 1 for a reaction means that the reaction is _______?Answer: One that will yield 50% products and 50% reactants left over Le Chatelier’s principle states that when a stress is applied to a system in equilibrium, the system will ______ the stress.Answer: Adjust to reduce Which is the most non-metallic of the following?Answer: B Which one of the following principal quantum numbers has largest, s orbital?Answer: n=4 Vitamins was discovered by _____?Answer: Casimir Funk The Tyndall effect is used to distinguish between ______?Answer: Solutions and Colloids The smallest particle of an element that exhibits all the properties of the element is the ______?Answer: Atom The purpose of a moderator in a nuclear reactor is to ______?Answer: Slow down fast neutrons to increase the probability of capture by uranium If dark matter did not exist it is likely that ______?Answer: The universe would begin contracting soon A 20-F capacitor is charged to 200V. It's stored energy is _______?Answer: 40000 J A standing wave ______?Answer: Can be constructed from two similar waves travelling in opposite directions Two uniform spheres are pivoted on horizontal axes that are tangent to their surfaces. The one with the longer period of oscillation is the one with _______?Answer: The larger radius One revolution is the same as ______?Answer: 2π rad The momentum of an object at a given instant is independent of its ______?Answer: Acceleration