🔬 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

Magnetic susceptibility (χ) measures on?Answer: Both A and C Which one of the following statements about the mass spectrum of CH3Br is correct?Answer: Last two peaks are of equal size at m/z values of 94 and 96 In a process at constant volume ΔE =_____?Answer: q The F-S-F bond angles in SF6 are?Answer: 90° and 180° The metal ions of transition metals are paramagnetic. The magnetic moment towards magnetic field is greatest of?Answer: Fe^+3 The co-ordination number and oxidation state of Cobalt in the given complex Na4[Co(C2O4)3] are respectively?Answer: 6 and +3 Which of the following molecule is polar and its dipole moment is 5.33 x 10⁻³⁰ Cm?Answer: SO₂ ‘He’ gas effuse from a hole of 10 dm^3 vessel in “5” seconds. The time for effusion of O2 from the same hole of 10 dm^3 will be?Answer: 14.1 seconds The cholesteryl - benzoate is?Answer: An example of liquid crystal The given reaction is the example of Free Radical Substitution CH₄ + Cl₂ → CH₃Cl + HCl. The order of this reaction is?Answer: First Automative antifreeze is a 60% weight/weight aqueous solution of ethylene glycol (C2H6O2) then its molality is?Answer: 24.2 moles/kg Only one pair of the liquid in the following set of solutions does not obey the Raoul’s Law. Identify it?Answer: Propanol and propanone The salt which is formed by neutralization of weak acid and weak base is?Answer: (NHl₄)₂ CO₃ 30 grams of acetic acid reacts with excess of ethyl alcohol to form 40 grams of ethyl acetate during esterification then percentage yield of ester is?Answer: 90.9% In chromatographic analysis the principle used is?Answer: Adsorption “Anti allergic medicines are also called antihistamines”. The histamine is a chemical produced in body due to the?Answer: Decarboxylation of amino acids Which substances are synthesized when ultraviolet radiations reaction with (CFCs) Chlorofluorocarbons and they result in the breakdown of ozone layer?Answer: Cl° and O° Which of the following process explain the process of tautomerism?Answer: None of these In the IR (infrared) spectrum of the carboxylic acid group, the C=O bond shows the peak-shaped band at the range of?Answer: 1710 cm⁻¹ After sperm cells are produced, they are mainly stored in the?Answer: Epididymis Initiation of polypeptide chain in protein synthesis is induced by?Answer: Methionine Flukes and tapeworms?Answer: Have well-developed reproductive system Fishes are the first formed?Answer: Chordates The mesoglea of Hydra contains?Answer: No cells A monosomic (2N-1) abnormality in hums's?Answer: Turner's syndrome Which of the following members of the class Arachnida are primary parasitic?Answer: Ticks & Mites Which of these is essential for coagulation of blood in our body?Answer: Phylloquinone The polypeptide hormone secreted by pancreas is?Answer: Glucagon Down's syndrome is due to?Answer: Nondisjunction of chromosomes Trilobites evolved in?Answer: Cambrian