What is the density of mercury? A) 8.96 g/cm³ B) 13.6 g/cm³ ✅ C) 1 g/cm³ D) 7.8 g/cm³ What is the boiling point of mercury? A) 357°C ✅ B) 100°C C) 273°C D) 500°C What is the weight of a 100 kg body on Earth? A) 980 N ✅ B) 100 N C) 9.8 N D) 1000 N What is the line passing through the center of a circle called? A) Radius B) Diameter ✅ C) Chord D) Tangent Displacement is a ______ quantity. A) Scalar B) Vector ✅ C) Neutral D) None of the above Which factor increases the rate of evaporation? A) Decrease in temperature B) Increase in surface area ✅ C) High humidity D) Low air movement Which of the following best represents the Alternating Property? A) a + b = b + a ✅ (Commutative Property) B) a × (b + c) = (a × b) + (a × c) C) (a + b) + c = a + (b + c) D) a ÷ b = b ÷ a Mathematics: In English grammar, which topic focuses on changing the subject and object of a sentence? A) Prepositions B) Active and Passive Voice ✅ C) Narration D) Tenses Which topics were most common in mathematics? A) Trigonometry and Probability B) Algebra and Geometry ✅ C) Calculus and Statistics D) Arithmetic and Fractions A matrix containing all zeros is called: A) Identity Matrix B) Diagonal Matrix C) Zero Matrix ✅ D) Square Matrix General Knowledge: What is the correct spelling for a military rank? A) Comm-der B) Commander ✅ C) Commmander D) Comander What is the definition of specific heat? A) The heat required to melt a substance B) The heat required to raise the temperature of 1 kg of a substance by 1°C ✅ C) The heat needed to vaporize a substance D) The total heat contained in a body English Language: The word "played" is a: A) Noun B) Verb ✅ C) Adjective D) Pronoun