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GPAT Paper, 2011 | Find out GPAT question Paper
Q.61 In the electrochemical series, the standard reduction potentials of copper and zinc are + 0.337 V and - 0.763 V, respectively. If the half cells of both of these metals are connected externally to each other through an external circuit and a salt bridge, which one of the following processes will take place?
(A) Zinc metal electrode will start cussohing.in solution while copper ions will start depositing on the copper electrode.
(B) Copper metal electrode will start dissolving in solution while zinc ions will start depositing on the zinc electrode
(C) Both of the metal electrodes will start dissolving in the solution
(D) Both types of ions will start depositing on their respective electrodes
Q.62 Indicators used in complexometric titrations are chelating agents. Choose the correct statement about them?
(A) Indicator-metal ion complex should have higher stability than EDTA-Metal ion complex
(B) Indicator-metal ion complex should have lower stability than EDTA-Metal ion complex
(C) Indicator-metal ion complex should have equal stability as EDTA-Metal ion complex
(D) Stability of the indicator-metal ion complex is not an important criterion in complexometric titrations
Q.63 Name the compound used for standardization of Karl-Fisher reagent in aquametry?
(A) Sodium tartrate dihydrate (B) Copper sulphate pentahydrate
(C) Sodium iodide (D) Sodium thiosulphate
Q.64 The following statements are given:
[P] Conformational isomers are interconvertible by rotation around a single bond while configurational isomers cannot be interconverted without breaking a bond.
[Q] Configurational isomers could be optically active or optically inactive while conformational isomers are optically inactive
[R] Geometric isomers must have a double bond in their structures
[S] Geometric and optical isomers are the two distinct categories of configurational isomers.
Choose the correct combination of statements.
(A) P, Q & S are true while R is false AB) P, R & S are true while Q is false
(C) Q, R & S are true while P is false (D) P, Q & R are true while S is false
Q.65 Determine the correctness or otherwise of the following Assertion (a) and the Reason (r):
Assertion (a): Formaldehyde and benzaldehyde both undergo Cannizaro reaction while acetaldehyde and phenyacetaldehyde undergo Aldol condensation.
Reason (r) : Aldehydes can undergo both Cannizaro as well as Aldol condensation while ketones undergo only Cannizaro reaction.
(A) Both (a) and (r) are false (B) (a) is true but (r) is false
(C) (a) is false but (r) is true (D) Both (a) and (r) are true
Q.66 Choose the correct statement for writing the sequence of amino acids in a polypeptide?
(A) Amino terminal is to be written on the left hand side while the carboxyl terminal is to be written on the right hand side
(B) Carboxyl terminal is to be written on the left hand side while the amino terminal is to be written on the right hand side
(C) Any of the amino acid terminals can be written on any sides but it is to be mentioned by specifying the amino terminal and the carboxyl terminal in abbreviations
(D) It varies from author to author how the sequence of amino acids in a polypeptide is to be written
Q.67 A carbocation will NOT show one of the following properties. Choose that.
(A) Accept an electron to give a carbene
(B) Eliminate a proton to afford an alkene
(C) Combine with a negative ion
(D) Abstract a hydride ion to form an alkane
Q.68 Choose the FALSE statement for E2 mechanism in elimination reactions?
(A) These reactions are accompanied by rearrangements
(B) These reactions show a large hydrogen isotope effect.
(C) These reactions show a large element effect
(D) These reactions are not accompanied by hydrogen exchange
Q.69 Polyamine polystyrene resins belong to which category of ion-exchange resins?
(A) Strongly Acidic Cation Exchange Resins
(B) Strongly Basic Anion Exchange Resins
(C) Weakly Acidic Cation Exchange Resins
(D) Weakly Basic Anion Exchange Resins
Q.70 Which amongst the following auxochromes produces a shift towards higher energy wave length?
(A) -CH3 (B) -NHCH3 (O -CI (D) -C=0
Q.71 Chloroform is stored in dark colored bottles because it is oxidized in presence of light and air to a toxic compound. Identify that.
(A) CH2C12 (B) COCl2 (C) CO (D) CCl4
Q.72 Given are the four statements about NMB:
[P] 13CMR is a less sensitive technique than PMR [Q] Both 13C and :H have 1=1/2
[R] Precessional frequency of the nucleus is directly proportional to the applied magnetic field
[S] Deuterium exchange studies can be performed to ascertain protons attached to heteroatoms.
Choose the correct combination of statements.
(A) P, Q & R are true while S is false (B) R, S & Q are true while P is false
(C) S, P & Q are true while R is false (D) All are true
Q.73 Discrepancies in potential measurements involving factors like 'alkaline error' and 'asymmetry potential' are associated with which of the following electrodes?
(A) Hydrogen electrode (B) Quinhydrone electrode
(C) Saturated calomel electrode (D) Glass Electrode
Q.74 What is the wavenumber equivalent of 400 nm wavelength?
(A) 0.0025 cm-1 (B) 0.25 cm-1 (C) 2500 cm-1 (D) 25000 cm-1
Q.75 All of the given compounds show n —> a* transition. Identify which one will have the highest λmax?
(A) Methanol (B) Methylamine
(C) Methyl iodide (D) Methyl bromide
