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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In the van der Waals equation (P + n2a / v2) (v – nb) = nRT which of the following statement is not true?

N2a/v correct for the intermolecular forces.

Nb correct for the volume occupied by gas molecules.

At high densities the equation reduces to the ideal gas law

All of the above statements are correct.

Methyl alcohol is not used as

A solvent

An anti freezing agent

A substitute for petrol

For denaturing of ethyl alcohol

The inhaled breath of diabetics patient contain acetone. A medical student wishes to test for diabetes by asking patient to bubble their breath through a reagent.

Alkaline aquenous iodine

Aqueous bromine

Fehling solution

Aqueous NaOH

Oxygen (molecular weight = 32) diffuses at a rate of 10cm3/min under the same conditions of temperature and pressure how fast will hydrogen (molecular weight = 2) diffuse?





When aquious bromine is added to aqueous phenol a creamy white ppt is obtained. What does this reaction show?

Phenol is unsaturated

2-bromophenol is insoluble in water

A hydroxy group makes the benzene ring more susceptible to electrophilic attack

Acid-base reaction

As a substance moves from a solid to a liquid all of the following changes occur except:

Molecules become more disordered.

K.E of the molecules decreases

Intermolecular forces become weaker.

Molecules move more frequently.

If a graph is plotted between temperature on x-axis and volume on y-axis for 1 mole of gas then we get straight line which cuts the temperature exis at



?273.16 K


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