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⏱ 0:30
Easy
Which of the following is the correct electronic configuration of Fe (Z=26)?
Easy
What is the molarity of a solution prepared by dissolving 58.5 g of NaCl in 500 mL of solution? (Molar mass of NaCl = 58.5 g/mol)
Easy
In the reaction 2SO2 + O2 → 2SO3, if 5 moles of SO2 react completely with excess O2, how many moles of SO3 are formed?
Medium
Which of the following statements is correct regarding the hybridization of the central atom in SF4?
Easy
Calculate the pH of a 0.001 M HCl solution.
Medium
The rate constant of a first order reaction is 0.693 min⁻¹. What is the half-life of the reaction?
Medium
Which of the following compounds exhibits cis-trans isomerism?
Medium
In the electrolysis of molten NaCl, what is produced at the cathode?
Hard
Which of the following is NOT a characteristic of transition metals?
Hard
The equilibrium constant (Kc) for the reaction N2 + 3H2 ⇌ 2NH3 is 4.5 × 10⁻⁵ at a certain temperature. What happens to the equilibrium if pressure is increased?