Chemistry Test Bank
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Avg score: 27% • Most missed: “Total number of orbitals in a shell having principle quantum number ‘n' is”
Chemistry Test Bank
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25 Questions

1. The substance that contains the maximum amount of nitrogen is
2. Metals usually form ………. oxides.
3. The pKa of HCN is 9.30. The pH of a solution prepared by mixing 2.5 moles of KCN and 2.5 moles of HCN in water and making up to total volume to 500 ml is
4. Iodine deficiency in diet is known to cause
5. The number of electrons present in H+ is
6. Point out the false statement.
7. Which of the following is paramagnetic?
8. Frenkel defect appears in
9. Iron rusts at the area
10. A Product, B Product.A and B are two different radioactive elements with half life periods TA and TB (in years) and lA (year'1) and lB (year'1) are their decay constants respectively. If half life periods are equal, disintegration rate at the start of disinte ration would be
11. Two elements frequently used for making transistors are
12. Isobars are produced as a result of the emission of
13. One litre of water contains 10'7 moles of H+ ions. Degree of ionization of H2O is
14. Glass articles are heat treated by
15. The number of g-molecule of oxygen in 6.02 × 1024 CO molecules is
16. 1-bromo-1-chloro 2, 2, 2 trifluoroethane is commonly used as
17. The following data are for the decomposition of ammonium nitrate in aqueous solution. Volume of N2 (in cc) Time (minutes) 6.25 10 9.00 15 11.40 20 13.65 25 35.05 Initially The order of the reaction is
18. The element first detected spectroscopically in the sun's atmosphere is
19. The solubility of Fe(OH)3 is x mole L'1. Its Ksp would be
20. In order to lower the temperature below 0°C, the substance mixed with ice is
21. A chemical used in photography is
22. The energy released when an extra electron is added to a neutral gaseous atom is called
23. Animal charcoal is obtained by
24. 0.2 M solution of formic acid is ionized 3.2%. Its ionization constant is
25. The multiplicity of 3d7 electron in an atom is

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