Paper no.4 CHEMISTRY

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MDCAT Chemistry Paper 4

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1.Which one of the following is simplest amino acid?

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2.Which one of the following polymer is called as Nylon 6,6? 

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3.Which one of the following is an exact composition of a carbohydrates? 

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4.Which one of the following nitrogen base is NOT present in DNA? 

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5.In the woody parts of trees, the %age of cellulose is: 

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6.In laboratory experiment an unknown compound was added in test tube containing iodine, the colour became intense blue. What could be the unknown compound?

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7.Ozone concentration is measured in:

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8.The gas which is mainly produced in landfills from the waste is:

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9.The substance for the separation of isotopes is firstly converted into the:

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10.The number of moles of CO2 which contain 8.00 gm of oxygen is:

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11.London dispersion forces are the only forces present among the:

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12.Electrical conductivity of graphite is greater in one direction that in other due to:

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13.The maximum number of electrons in electronic shell can be calculated by using formula:

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14.12H2(g)H(g) H=218 kJ mol-1 In this reaction, H will be called:

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15.Mg + 1/2 O2(g)MgO(g)+-692 kJ mol-1 at STP

Enthalpy of the above reaction will be called:

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16.Freezing point will also be defined as that temperature at which its solid and liquid phases have the same: 

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17.What mass of NaOH is present in 0.5 mol sodium hydroxide?

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18.Study the following redox reaction:

10Cl+ 16H+ + 2MnO4- → 5Cl₂ + 2Mn+2 + 8H₂O

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19.Human blood maintains its pH between:

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20.Value of Ksp for PbSO, system at 25°C is equal to:

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21. 2A+B → Product If the reactant 'B' is in excess, the order of reaction with respect to 'A' in given rate law,

Rate k[A][B] is:

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22. The rate constant 'k' is 0.693 min-1. The half-life for the 1st order reaction will be:

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23.Melting points of group II-A elements are higher than those of group

I-A because:

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24.The ionic radius of fluoride ion is:

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25. 2NaOH(aq)+Cl2(g) NaCl + NaClO + H₂O proceed at:

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26.Which halogen molecule 'X2' has lowest dissociation energy?

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27.The anomalous electronic configuration shown by chromium and copper among 3-d series of elements is due to:

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28.Which element of 3d series of periodic table shows the electronic configuration of 3d, 4s¹?

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29.The %age of nitrogen in ammonium nitrate is:

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30.Which one of the following is anhydride of sulphuric acid?

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