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Entry Test MCQ :: MCAT ECAT Chemistry Paper


21.  When an electron is moving with velocity of 2.188 x 106 ms-1 in the first orbit of Bohrs model of hydrogen. The de Broglie wavelength of electron is
A. 0.33 nm B. 0.34 nm
C. 0.35 nm D. 0.36 nm

22.  On heating aldehydes with Fehlings solution we get a precipitate whose colour is
A. pink B. black
C. yellow D. brick red

23.  When methl iodide and ethyl iodide are treated with sodium metal possible major products are obtained.
A. 1 B. 2
C. 3 D. 4

24.  Which of the following rays has greater frequency.
A. ? -rays B. ? -rays
C. ? -rays D. X -rays

25.  Which statement is consistent with Hunds rule.
A. Electrons fill orbitals with parallel spins until all the orbitals of the same energy are half filled then they go into sub-shells with anti-parallel (opposite) spin. B. The electrons in the same atom cannot have the same four quantum numbers
C. There is maximum of two electrons is an orbital. D. None

26.  What is maximum number of electrons in an orbital with m (magnetic quantum number) = 3
A. 6 B. 4
C. 3 D. 2

27.  Atomic number of Mn is 25 what is the electronic configuration in the ground state
A. 1s2 2s2 2p6 3s2 3p6 3d7 B. 1s2 2s2 2p6 3s2 3p6 4s2 4p5
C. 1s2 2s2 2p6 3s2 3p5 3d10 D. 1s2 2s2 2p6 3s2 3p6 4s23d5

28.  Which of the following statement is correct
A. size of Cl atoms > Cl- ion B. size of Na+ ion < Na atom
C. size of Na atom < Na+ ion D. Cl- < Na+

29.  Which of the following is mineral fibre.
A. teflon B. asbestos
C. saran D. acrylic

30.  Which catalyst is used in contact process?
A. Fe2O3 B. V2O5
C. SO3 D. Ag2O




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