🔬 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

As the pressure in an ideal gas is increased isothermally the average molecular speed _____?Answer: Stays the same An object attached to one end of a spring makes 20 vibrations in 10s. It's frequency is?Answer: 2Hz When flowing water enters the constriction of horizontal pipe the water's ______?Answer: Speed increases and pressure decreases A person can exert maximum pressure on the ground if ______?Answer: He stands on the toes of one foot The physical quantity "impulse" has the same dimensions as that of ______?Answer: Momentum The maximum number of electrons in sub energy level I = 3 are _____?Answer: 14 The F-F bond energy is less than Cl-Cl bond energy because of ______?Answer: Small size and high electron repulsion The carbon atoms in ethyne C₂ H₂ are said to be _______?Answer: sp-hybridzed The noble gases so unreactive because of ______?Answer: Complete octet Which of the following regions of the spectrum would be used to determine the structure of crystalline solids?Answer: X-rays An object descends vertically at constant velocity in sea. The three forces acting on the object are viscous drag upthrust and weight. Which relationship between their magnitude is correct?Answer: Weight > upthrust Which compounds are isomers?Answer: CH₂CH₂CHO and CH₃COCH₃ The power loss P in a resistor is calculated using the formula P = V²/R. The uncertainty in the potential difference V is e% and the uncertainty in R is 2%. What is the uncertainty in P?Answer: 11% Which process converts an atom from one element to another, when the nucleus of an atom is bombarded with high energy particles?Answer: Artificial transmutation Which metal can replace Cr in the formula of Cr₂O₃?Answer: Aluminum Which substance can act as Arrhenius base in an aqueous solution?Answer: LiOH A racemic mixture is a equimolar mixture of ______?Answer: Enantiomers pH of the solution after dissolving little amount of sodium occtate is ______?Answer: 8.0 Which one of the following detector is not suitable to use with gas chromatography?Answer: AAS A radioactive atom X emits an beta-particle. The resulting atom _____?Answer: Has an atomic number that is one more than that of X Which one of the following has greatest energy?Answer: A photon of violet light An isothermal process for an ideal gas is represented on a P-V diagram by _____?Answer: A portion of a hyperbola If 200 ml of a gas at constant pressure is heated from 0°C to to 100°C, the volume is corrected by multiplying by ______?Answer: 373/273 If 200 ml of a gas at constant pressure is heated from 0°C to to 100°C, the volume is corrected by multiplying by ______?Answer: 373/273 The general pre-requisite condition for the stable existence of 2n interface between phases is that ______?Answer: Free energy of formation be negative How much energy is required to boil a kettle of water containing 1 litre at 15°C (Specific heat capacity of water = 4.18?Answer: 355 kJ A force on a particle is conservative if ______?Answer: Its work depends on the end points of every motion, not on the path between them The area under a velocity-time graph gives/represents ______?Answer: Displacement If the wave length of photon is doubled _____?Answer: Energy is reduced by the factor of two To play second fiddle means?Answer: To support the role ans view of another person