AIEEE Sample Test

Question

On gold surface, the rate of decomposition of HI is independent of the pressures of HI but on Pt surface, the rate is proportional to concentration of HI. It is concluded that

Possible Answers

Selected	Possible Answer
	HI is strongly absorbed on gold
	HI is weakly adsorbed on Pt
	Reaction follow zero order on Au and Ist order on Pt
	all of these

Question

A cell with two electrodes, one of grey tin an the other white tin, both dipping in solution of (NH_4)_2SnCl_6 showed zero emf at 18^oC . What conclusion may be drawn from this?

Possible Answers

Selected	Possible Answer
	The free energy change of the cell becomes zero
	Grey tin being non-metallic ceases to provide a reversible electro reaction
	Electrode surface develops a protective layer and the cell develops a very large internal resistance
	The emf developed at the electrode-solution phase boundary cancels the normality emf

Question

Amongst NO_3^-, $AsO_3^{2-},CO_3^{2-},ClO_3^-,SO_3^{2-} \quad and \quad BO_3^{3-}$ the non planar species are

Possible Answers

Selected	Possible Answer
	$CO_3^{2-}, SO_3^{2-},BO_3^{3-}$
	$NO_3^-, CO_3^{2-},BO_3^{3-}$
	$AsO_3^{2-},ClO_3^-,SO_3^{2-}$
	$SO_3^{2-},NO_3^{-},BO_3^{3-}$

Question

When n-pentane is isomerized to using AlCl_3 catalyst at 575 K traces of olefine formed is

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Selected	Possible Answer

Question

The system in which all bond lengths are not same is

Possible Answers

Selected	Possible Answer

	$[Ni(CN)_4]^{2-}$

Question

A hydrogen electrode is placed in a solution of 0.1 M CH_3--COOH which is being titrated against 0.1 M NaOH. How would the electrode potential change?

Possible Answers

Selected	Possible Answer
	gradually decreases
	first decrease then increase
	first increase then decrease
	gradually increases

Question

A water soluble substance gives with AgNO_3 solution in presence of dilute HNO_3 a pale yellow precipitate. What may be observed if a solution of the substance in dilute H_2SO_4 is treated with drops of KMnO_4 ?

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