--- Q1. Antonyms of brave? Ans: Cowardly, fearful, timid Q2. Synonyms of happy? Ans: Joyful, cheerful, delighted, content Q3. Synonyms of careful? Ans: Cautious, attentive, vigilant Q4. Synonyms of small? Ans: Tiny, little, miniature, compact Q5. Antonyms of display? Ans: Hide, conceal, cover Q6. Active voice sentence convert into passive voice? Ans: Example: He writes a letter. → A letter is written by him. (If you give a specific sentence, I’ll convert it.) Q7. Which force is quantity? Ans: Force is a vector quantity (has magnitude and direction). Q8. Unit of electric current? Ans: Ampere (A) Q9. Value of velocity? Ans: Velocity = Displacement / Time (unit: m/s) (Specific value depends on given data.) Q10. Square root of 25? Ans: 5 Q11. What is the vitamin for weakness, fatigue, and swallowing issues? Ans: Vitamin B12 (Deficiency causes fatigue and weakness) Q12. What is imaginary? Ans: A number that includes i, where i = √(-1) (e.g., 3i) Q13. Reciprocal of cosec? Ans: sin (since cosec = 1/sin) Q14. (M - n)(M + n)? Ans: M² - n² (difference of squares formula) Q15. Acceleration? Ans: Rate of change of velocity Formula: a = Δv / Δt Unit: m/s² Q16. Dimensions of velocity? Ans: [L T⁻¹] Q17. sin²a + cos²a - 1 = ? Ans: 0 (Because sin²a + cos²a = 1) Q18. i² = ? Ans: -1 Q19. Conjugate of 1 - 4i? Ans: 1 + 4i Q20. What is square matrix? Ans: 5×5 Ans: A matrix with the same number of rows and columns. Example: 5x5 is a square matrix. ---