Which of the following is correct? (A) = 7 a (B) = 8 b (C) Atomic number of I is 14. (D) I and II are isotopes of the same element. 2. Which of the following is the correct order of the decreasing ionic radius for Na+, Mg2+, O2−, and F−? (A) Na+ > Mg2+ > F− > O2− (B) Mg2+ > Na+ > O2− > F− (C) O2− > F− > Na+ > Mg2+ (D) F− > O2− > Mg2+ > Na+ 3. Which of the following molecules has a non-zero dipole moment? (A) CO2 (B) CCl4 (C) C2H2 (D) H2Se 4. The reaction rate is the change in concentration of a reactant or product with time, the unit of which is M/s. When the reaction rate depends on the power to the concentration of a reactant, n-th [R]: where is the rate constant, it is called an order reaction. The following graph shows [R] as a k n-th function of time for the chemical reaction R P. (P denotes the product). M = moles/litre Which of the following is correct for both and the unit of for the reaction R P? n k (A) 0, 1/s (B) 0, M/s (C) 1, 1/s (D) 1, M/s
Which of the following is correct? (A) a = 7 (B) b = 8 (C) Atomic number of I is 14. (D) I and II are isotopes of the same element. 2. Which of the following is the correct order of the decreasing ionic radius for Na+, Mg2+, O2−, and F−? (A) Na+ > Mg2+ > F− > O2− (B) Mg2+ > Na+ > O2− > F− (C) O2− > F− > Na+ > Mg2+ (D) F− > O2− > Mg2+ > Na+ 3. Which of the following molecules has a non-zero dipole moment? (A) CO2 (B) CCl4 (C) C2H2 (D) H2Se 4. The reaction rate is the change in concentration of a reactant or product with time, the unit of which is M/s. When the reaction rate depends on the n-th power to the concentration of a reactant, [R]: where k is the rate constant, it is called an n-th order reaction. The following graph shows [R] as a function of time for the chemical reaction R P. (P denotes the product). M = moles/litre Which of the following is correct for both n and the unit of k for the reaction R P? (A) 0, 1/s (B) 0, M/s (C) 1, 1/s (D) 1, M/s
Multiple_Choice_Exam_Sheet_Final.docx