🔬 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 BH₃ molecule H-B-H bond angle is 120°. What kind of hybridization is likely?Answer: sp₂ The structure that remains after an acid has given up proton is called ____?Answer: Conjugate base 50P15 is unstable because ______?Answer: It is odd-odd nucleus The geometry and type of hybrid orbital present about the central atom in BF₃ is ______?Answer: Trigonal planner, sp^2 If coordination number is 6, the radius is _______?Answer: 0.414 Which of the following spectroscopy uses an energy source of around 7ev?Answer: UV (Ultraviolet) spectroscopy Nuclear fusion, like nuclear fission ______?Answer: Is exoergic Which is more energetic?Answer: 𝛾-rays The laser produces _____?Answer: A beam of a monochromatic coherent light Yeast is added to dough for making bread. The dough is then set aside in a warm place before being baked. Yeast is added to the dough because _____?Answer: It produces carbon dioxide which makes the dough rise A fusion reaction is initiated by _____?Answer: High temperature Small liquid drops assume spherical shape because ______?Answer: The liquid tends to have minimum surface area due to surface tension Oxygen combines with other elements and produces what is called oxidation or burning. When oxidation is very quick (may be sudden), what is it called in science?Answer: Combustion Silver is admittedly a soft metal. It is combined with some other metals to become ideal for making jewellery and coins. What is that metal?Answer: Copper Calorie requirements vary according to all of the the following except?Answer: Intelligence The best source of vitamins for high school pupil is ______?Answer: A properly varied diet The term "Thermonuclear reaction" refers to the heat released in ______?Answer: Fusion In order to organize facilitates and help achievement of optimum result and see overall effectiveness evaluation is to be conducted by ______?Answer: Administrators With increase in temperature, the velocity of _____?Answer: Both gases and liquids increases Radium gives off rays known as ______?Answer: Alpha rays Light is a form of ______ and its speed be measured.Answer: Energy Select the correct answer: A closed bottle containing water at 300°C is carried to the moon in a spaceship. If it is placed on the surface of the moon, what will happen to the water as soon as the lid is opened?Answer: Water will boil Fathometer is used to measure ______?Answer: Ocean Depth An isotope of uranium employed as fuel in ______?Answer: U-235 The genetic material of chromatin in ______?Answer: DNA As the temperature rises, the speed of sound ______?Answer: Rises Which is used in measuring of high temperatures?Answer: Thermo-electric pyrometers Unequal expansion of metals makes possible the operation ____?Answer: Thermostats When water vapour comes into contact with the earth vegetation, it leaves drops of water on its leaves. What is called?Answer: Dew As pressure is applied to ice, the melting point of the ice ______?Answer: Decreases