🔬 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 oxidation states of boron are:Answer: +1,+2 and +3 The atomic masses of sodium and chlorine are 23 and 35, respectively 29, grams of sodium chloride is equivalent to:Answer: 0.5 moles Potassium permanganate reacts with hydrogen sulphide (H2S) to produce:Answer: Sulphur Benzene has an extraordinary stable molecule because of:Answer: Delocalization of the electron cloud Alkanes or Paraffins are made up of:Answer: Carbon and hydrogen only When water freezes, it occupies:Answer: 9% more space At muree hills, water will boil at about:Answer: 98°C Density of oxygen is about 16 times that of hydrogen. Therefore if speed of hydrogen is “x” then speed of oxygen:Answer: Greater than x A police motor cycle running at 140 km/hr. the apparent frequency heard by the car driver is?Answer: Greater than 10 kHz When you drop a ball it accelerate at 9.8m/sec² . If you instead throw it downward then it accelerates immediately after leaving your hand assuming no air resistance:Answer: 9.8 A truck of mass 5000 Kg are both travelling at a speed at a speed of 36 Km/hr. Assume the time required to stop the truck in 10 sec is X Newton and the force required to stop the car in 10 sec us Y Newton. The difference X and Y is equal to?Answer: 4 Kilo Newton The maximum value if drag forcer on an object is 9.8 N. What will be the value if its mass?Answer: 1 kg Which of the following should remain constant if no torque acts upon a bofdy:Answer: Angular momentum Rocket propulsion is according to law of conservation of:Answer: Momentum The time period of pendulum at centre of earth:Answer: Infinite The wavelength of wave is 5000 Å. This wave will be in region:Answer: Visible A body absorbs heat at constant temperature, then this phenomenon will be:Answer: Both A and B Speed of sound in vacuum is:Answer: 0m sec₋₁ Most ideal gas at room temperature is:Answer: H₂ When spectrum of hydrogen atom is taken in magnetic field¸ some new lines are created. This is called:Answer: Zeeman’s effect Ball pen functions on the principle of:Answer: Surface tension In microwave oven, thhe wave energy produced is absorbed by certain polar molecule, in which molecule out of the given molecules would absorb maximum energy?Answer: C₂H₅OH Which of the following statement regarding CATHODE RAY is correct?Answer: All of these Ionization energy does not increase?Answer: In increases in number of electronic shell Which of the following molecule does not exhibit tetrahedral arrangement of electron pairs?Answer: H₂O Which of the following consist of atoms and molecules and are held together by van der wall’s forces?Answer: CO₂ Which molecule, out of given molecules will not form hydrogen bond with another of the given molecules?Answer: CH₂CHO Which of the following hydride is ionic in nature?Answer: NaH Which of the following equation represents reaction when Lithium nitrate is heated?Answer: 4LiNO₃ → 2Li₂O + 4NO₂ + O₂ Which compound of the following is used in breathing equipment’s as it absorbs CO2 and gives out O2 at the same time?Answer: KO₂