MCAT ECAT Chemistry Paper
Our collections of Multiple choice questions and answers focuses Based on questions appearing in the Latest MDCAT and ECAT papers, most of the questions are chosen from most authoritative and best reference books on Chemistry. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, MDCAT, Teaching jobs Tests and Chemical industry job interviews. One should practice our Mcqs to assimilate in Chemistry comprehensively.
17. Paramagnetic behaviour of substance is measured by a balance called
Analytical balance
Guoys balance
Electrical balance
Single beam balance
Answer & Solution
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18. In solids the temperature is the measure of
Average kinetic energy of molecules
Vibrational kinetic energy
Translational kinetic energy
None of the above
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19. Which of the following properties prove that cathode rays are material in nature
They cast shadow
They possess momentum
They are negatively charged
All of the above
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20. Fruit juices and fizzy drinks such as lemonade are often sold in aluminium cans. What is the most important reason aluminium is a suitable metal?
Aluminium can be recycled
Aluminium has very low density
Aluminium is the most abundant metal in the earth crust
Aluminium is resistant to corrosion by organic acids.
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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
0.33 nm
0.34 nm
0.35 nm
0.36 nm
22. On heating aldehydes with Fehlings solution we get a precipitate whose colour is
Pink
Black
Yellow
Brick red
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23. When methl iodide and ethyl iodide are treated with sodium metal possible major products are obtained.
1
2
3
4
24. Which of the following rays has greater frequency.
? -rays
? -rays
? -rays
X -rays
25. Which statement is consistent with Hunds rule.
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.
The electrons in the same atom cannot have the same four quantum numbers
There is maximum of two electrons is an orbital.
None
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26. What is maximum number of electrons in an orbital with m (magnetic quantum number) = 3
6
4
3
2
27. Atomic number of Mn is 25 what is the electronic configuration in the ground state
1s2 2s2 2p6 3s2 3p6 3d7
1s2 2s2 2p6 3s2 3p6 4s2 4p5
1s2 2s2 2p6 3s2 3p5 3d10
1s2 2s2 2p6 3s2 3p6 4s23d5
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28. Which of the following statement is correct
Size of Cl atoms > Cl- ion
Size of Na+ ion
Size of Na atom
Cl-
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Teflon
Asbestos
Saran
Acrylic
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Fe2O3
V2O5
SO3
Ag2O
C. size of Na atom Answer & Solution
C. size of Na atom Answer & Solution
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