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.

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16.
All the transition elements show

Similar physical properties

Similar chemical properties

Both a and b

None

17.
Paramagnetic behaviour of substance is measured by a balance called

Analytical balance

Guoys balance

Electrical balance

Single beam balance

18.
In solids the temperature is the measure of

Average kinetic energy of molecules

Vibrational kinetic energy

Translational kinetic energy

None of the above

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

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.

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

23.
When methl iodide and ethyl iodide are treated with sodium metal possible major products are obtained.

1

2

3

4

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

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

28.
Which of the following statement is correct

Size of Cl atoms > Cl- ion

Size of Na+ ion C.size of Na atom

Size of Na atom

Cl-

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