Introduction to Chemistry
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Introduction to Chemistry
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25 Questions

1. Which of the following particles having same kinetic energy would have the maximum de Broglie wavelength?
2. If Aufbau rule is not followed, 19th electron in Fe (Z = 21) will have
3. The energy of electron in Li2+ species depends on
4. The number of gram molecules of oxygen in 6.02 × 1024 CO molecules is
5. A balanced chemical equation is in accordance with
6. The mass of carbon anode consumed (giving only CO2) in the production of 270 kg of Al metal from bauxite by the Hall's process is
7. Which of the following statements is not correct for an electron that has the quantum numbers n = 4 and m = 2?
8. Following ion will be coloured if Aufbau rule in not followed.
9. Equal volumes of different gases at any definite temperature and pressure have
10. The accelerating potential that must be imported to a proton beam to give it an effective wavelength of 0.050 Å, is
11. The ratio of the energy of an electron in ground state of hydrogen to the electron in first excited state of Be3+ is
12. In known elements, the maximum number is of
13. The oxide of a metal has 32% oxygen. Its equivalent weight would be
14. Magnetic moment of V (Z = 23), Cr (Z = 24) and Mn (Z = 25) are x, y and z respectively. Then
15. If each hydrogen atom is excited by giving 8.4 eV of energy, then the number of spectral lines emitted is equal to
16. At N.T.P. 5.6 litres of a gas weigh 8 gram. The vapour density of the gas will be
17. The wavenumber of the first line in the Balmer series of hydrogen is 15,200 cm'1, wavenumber of the first time in Balmer series of Be3+ is
18. The number of significant figure in 0.0049 is
19. Which of the following best describes the emission spectrum of atomic hydrogen?
20. The M.K.S. system was first introduced by
21. The sodium flame test has a characteristic yellow colour due to the emission of wavelength 589 nm. The mass equivalence of one photon of this wavelength is
22. Total number of orbitals in a shell having principle quantum number n is
23. 276 g of silver carbonate on being strongly heated yields a residue weighing
24. The most abundant element in the earth's crust is
25. The electronic configuration of M2+ ion is 2, 8, 16 and its mass number is 58. The number of neutrons in its nucleus would be

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