CHEMISTRY 2nd YEAR MCQS QUESTIONS CHAPTER # 1 Periodic Classification of Elements & Periodicity 1. Which of the following pairs are chemically dissimilar? (A) Na and K (B) Ba and Sr (C) Zr and Hf (D) Ca and Zn. 2. The total number of inner transition elements is (A) 10 (B) 14 (C) 28 (C) 30 3. The alkali metal which is liquid at 15oC is (A) K (B) Cs (C) Na (D) None 4. Which of the following ion will form most water soluble hydroxide? (A) K+ (B) Ni2+ (C) Zn2+ (D) Al3+ 5. Which of the following has greatest tendency to lose electron? (A) F (B) Fr (C) S (D) Be. 6. The oxide of which of the following elements will be acidic in character (A) Mg (B) Rb (C) Li (D) CI 7. Which of the following is isoelectronic with carbon atom? (A) Na+ (B) Al3+ (C) O2- (D) N+D 8. Which of the following ions are paramagnetic in character? (A) Zn2+ (B) Cu+ (C) Ni2+ (D) Ag+ 9. Ca2+ ion is isoelectronic with (A) Mg2+ (B) Na+ (C) Ar (D) Kr 10. Gradual addition of electronic shells in the noble gases causes a decrease in their (A) Ionization energy (B) atomic radius (C) Boiling point (D) density. ANSWERS WILL GET TOMORROW
Posted on: Wed, 14 Aug 2013 19:56:13 +0000
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