GATE CY kind:question PYQs & Answers — Page 17

Questions 161–170 of 650. Imported answers require independent review unless marked reviewed.

The number of metal-metal bond(s) in the complex

and in

. The value of

is ___. (Assume 18 electron rule is followed.) (Answer in integer)

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H NMR spectrum of a mixture containing CH

Br (

mol) and (CH

)

CBr (

mol) shows two singlets at 2.7 ppm and 1.8 ppm, with the relative ratio of 3:1 (integration value), respectively. The value of

is ____. (rounded off to the nearest integer)

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The value of

in atomic unit of energy is _____. (

: charge of electron;

: Bohr radius;

: permittivity of vacuum) (rounded off to the nearest integer)

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The partial vapor pressure of 0.1 mol solution of B in liquid A is 60 kPa at 300 K. The partial vapor pressure (in kPa) of a solution containing B with mole fraction of 0.1 in liquid A at 300 K is ____. (Assume the solute B obeys Henry’s law. The molar mass of A is 80 g mol

.) (rounded off to three decimal places)

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Consider the following two parallel irreversible first-order reactions, where

at 300 K. After complete conversion of R at 300 K, the concentration of P1 in the reaction mixture was 15 mol L

. The initial concentration of R (in mol L

) was ____.

(

and

are the rate constants) (rounded off to one decimal place)

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Borax on treatment with NaOH and H₂O₂ forms X. The compound X on reaction with PhCN at 60 °C in methanol-water mixture gives Y as the major product. X and Y, respectively, are

Your answerChoose one option.

NaB(O)(OH)₂·nH₂O and PhCONH₂

NaB(O)(OH)₂·nH₂O and PhCOOH

Na₂B₂(O₂)₂(OH)₄·nH₂O and PhCONH₂

Na₂B₂(O₂)₂(OH)₄·nH₂O and PhCOOH

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In the EPR spectrum of an aqueous solution of VSO₄ at room temperature, the total number of hyperfine splitting signals is

Your answerChoose one option.

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The hapticity of allyl and Cp and the ligation mode of NO in the thermodynamically stable complexes [(ηˣ-allyl)Ru(CO)₂(NO)] and [(ηʸ-Cp)Ru(CO)₂(NO)], respectively, are (The hapticity of allyl and Cp are denoted by ηˣ and ηʸ, respectively.)

Your answerChoose one option.

(η³, NO-bent) and (η⁵, NO-linear)

(η³, NO-linear) and (η⁵, NO-bent)

(η¹, NO-bent) and (η³, NO-bent)

(η¹, NO-bent) and (η⁵, NO-linear)

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