🔬 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

What are hormones?Answer: Secretions of ductless gland We can see most objects because they _______?Answer: Reflect light A radio signal will travel around the earth (in a great circle) in about ______?Answer: 1/7 second Man differs from birds in that man has ______?Answer: Hair The function of nerve cell is _____?Answer: To transmit messages The hydrogen bonds has _____?Answer: Electrostatic nature A Lewis structure is representation of a molecule that shows the disposition of ______?Answer: Valance electrons pH is the logarithm of the reciprocal of the ______?Answer: Hydrogen ion concentration An orbital which posseses lower energy than the atomic orbitals from which it is formed is called ______?Answer: Bounding A substituent effect on the organic compound due to permanent polarity of the group is called ______?Answer: Inductive Effect At equilibrium at specific temperature, pressure exerted by the liquid is called ______?Answer: Vapour pressure The compounds having all the electrons paired are called ______?Answer: Diamagnetic Paramagnetic compounds are _______ by the magnetic field.Answer: Attracted Ionic hydrides are formed by elements of ______?Answer: Group-IA Array of points which show how the constituent particles of a crystal are arranged at different sites in 3 dimensional space is called ______?Answer: Space lattice Bronsted acid is a proton ______?Answer: Donor Elements of S-block all have configurations ______?Answer: ns^1/ns^2 Principal quantum number determines how far from the nucleus the _______ is to be found.Answer: Electron The radioactivity due to C-14 isotope (half life 6000 years) a sample of wood from an ancient tomb was found to be nearly half of that fresh wood. The tomb is therefore about _____?Answer: 6000 years An example of of nonstoichiometric compound is ______?Answer: Fe2O4 The chemical formula of Potassium cobaltinitrite is ______?Answer: K₃[Co(NO₂)₆] The high polymer of Ethylene is known as ______?Answer: Polythene If P pure orbitals are used in forming the C-H bonds in CH₄ angle of 90° would be expected The observed angles are 109° each. What concept might be useful in explaining the observed angles?Answer: Hybridization When two cubes are pressed over each other they unite to form one cube. Which of the following force is responsible for holding them together?Answer: Vander Wall's forces A gas is said to behave like an ideal gas when relation PV/T= Constant. When do you expect a real gas to behave like ideal gas?Answer: When the temperature is high and pressure is low The complexes that contain less than three d-electrons are _____?Answer: Labile If pure P orbitals were used in forming the B-F bonds in BF₃ angles 90° would be expected. The actual observed bond angle is 120°. What concept might be useful in explaining the observed angles?Answer: Hybridization The uranium-238 decays to thorium-234 by process of ______?Answer: Alpha radiation When a nucleus emits beta particles, the parent and daughter nuclei are ______?Answer: Isobars The critical temperature of water is higher than O₂, because the H₂O molecules have ______?Answer: Dipole moment