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Chemistry Test Bank
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Chemistry Test Bank
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25 Questions

1. pOH of 10'8 M solution of NaOH will be
2. Dipole moment is exhibited by
3. Which of the following is used as neutron absorber in the nuclear reactor?
4. The number of mole of KMnO4 that will be needed to react with one mole of sulphite ion in acidic solution is
5. In solid ammonia, each NH3 molecule has six other NH3 molecules as nearest neighbours. ΔH of sublimation of NH3 at the melting point is 30.8 kJ mole'1 and the estimated ΔH of sublimation in the absence of hydrogen bonding is 14.4 kJ mole'1. Strength of H-bond in solid NH3 is approximately
6. An element with atomic number 36 belongs to the
7. Ferrimagnetism is in
8. Carbon monoxide is a poison because it
9. Nylon is
10. 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
11. Rare gases are generally chemically inert because they
12. Gypsum is
13. Which is paramagnetic and coloured?
14. For a first-order reaction, the ratio of times to complete 99.9% and half of the reaction is
15. In which of the following molecules, the bond angle is maximum?
16. Which pair is incorrect?
17. With reference to the concept of ionization potential, which one of the following sets is correct?
18. Which statement is correct about the following change? I2 + 2S2O3 2' 2I' + S4O6 2'
19. The cyclotron is a device for
20. Match the following List I List II I. Natural rubber A Buna-S II. Synthetic B Latex rubber III. Natural fibre C Wool IV. Synthetic D Nylon fibre Codes I II III IV
21. When H2S is passed through acidified KMnO4 solution, the colour of solution is decolourized. The change in oxidation state of Mn is
22. In sp3d hybridization, the d-orbital that participates in hybridization is
23. Alkali metals in liquid ammonia are blue colour because
24. The electronegativity of cesium is 0.7 and that of fluorine is 4.0. The bond formed between the two is
25. Which has maximum EAN of the underlined atoms? (Cr = 24, Co = 27, Fe = 26, Ni = 28)

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