Online NAT IM Pre Medical Chemistry Test Preparation for Pakistani Students

NAT I Medical Chemistry

Sr. #	Questions	Answers Choice
1	A cell constant is generally found by measuring the conductivity of aqueous solution of	BaCI<sub>2</sub> KCI NaCI MgCI<sub>2</sub>
2	An electrolyte	Forms complex ions in solution Gives ions only when electricity is passed Possesses ions even in solid state Gives ions only when dissolved in water
3	When electricity is passed through molten AI₂O₃ + Na₃AIF₆ and 13.5 gms AI are deposited,the number of faraday must be	0.5 1.0 1.5 2.0
4	The reference calomel electrode is made from which of the following?	ZnCI<sub>2</sub> CuSO<sub>4</sub> Hg<sub>2</sub>CI<sub>2</sub> HgCI<sub>2</sub>
5	If a salt bridge is removed between the two half cells the voltage	Drops to zero Does not change Increases gradually Increases rapidly
6	When quantity of electricity passed is one faraday then the mass deposited at the electrode is equal to	One gm. atomic weight One gm. Equivalent weight Electrochemical equivalent None of the above
7	Which of the substances Na, Hg, S Pt and graphic can be used as electrodes in electrolytic cells having aqueous solution?	Na,Pt and graphite Na and Hg Pt and graphite only Na and S only
8	Which is not a colligative property?	Osmotic pressure Lowering of vapour pressure Depression of freezing point Elevation of boiling point