ETEA PAST PAPER 2020 ETEA 2020 ( PART 9 ) 1. The common oxidation number of halogens is: +1 0 -2 -1 2. During oxidation process, oxidation number of an element: Remains constant Decreases Both Increase & Decrease Increases 3. Which of the following has the height value of electronegativity? Br 1 Cl F 4. The first ionization energy is maximum for: Na K Mg Al 5. The efficiency of chemical reaction can be expressed as: Maximum yield %yield Theoretical yield Actual yield 6. In a vessel, 10g N2, 10g H and 10g O2 are present. Which one will have the least number of atoms? H2 Both H2 & N2 O2 N2 7. The empirical formula of Glucose C6H12O6 is: CH2O C6H12O16 CH2O2 CHO 8. The relationship between quantum number n and I is: I = n-2 N = 1-2 N = 1-1 I = n-1 9. Quantum number values for ‘2p’ orbitals are: N=2, I=1 N=2, I=0 N=1, I=2 N=1, I=0 10. Which of the following hybrid orbitals has maximum ‘S’ –character? Sp3 – hybrid orbital Sp – hybrid orbital Sp2 – hybrid orbital Dsp2 – hybrid orbital Loading … Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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