GATE CY topic:chemical-reactions PYQs & Answers — Page 4

Questions 31–40 of 650. Imported answers require independent review unless marked reviewed.

A 0.005 M solution of compound X transmits 80% of the incident light of wavelength (λ) 500 nm. The absorbance of 0.01 M solution of X is _____ (rounded off to three decimal places).

(Given: path length = 1.0 cm)

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The microwave spectrum of gaseous HF consists of a series of lines separated by 41.11 cm

. The bond length (in Å) of HF is _____ (rounded off to two decimal places).

(Given: Atomic mass (in amu): H = 1.008, F = 18.998; 1 amu = 1.661 × 10

kg; h = 6.626 × 10

J s; c = 2.998 × 10

m s

)

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In a

H NMR spectrum obtained from a spectrometer operating at a magnetic field of 14.1 T, two resonances are observed at 1.25 ppm and 5.75 ppm. The separation between the two resonances (in Hz) is _____ (rounded off to one decimal place).

(Given: gyromagnetic ratio (γ) of H = 2.675 × 10

)

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The maximum work (|W

|, in kJ) that can be obtained by complete combustion of 1.0 mol of CH

at constant pressure and 25 °C is _____ (rounded off to one decimal place).

(Given: ΔS = −241.60 J K

mol

; ΔH = −890.0 kJ mol

; R = 8.314 J mol

)

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If the ionic mobility of Ag

ion in a very dilute aqueous solution of AgNO

at 298 K is y × 10

, then the value of y is _____ (rounded off to two decimal places).

(Given: viscosity of water at 298 K = 8.94 × 10

kg m

; k = 1.38 × 10

J K

; F = 96500 C mol

; R = 8.314 J mol

; Stokes radius of Ag

= 0.15 nm)

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The major product formed in the following reaction is

Your answerChoose one option.

Diagram for Chemistry question 36 (figure 2)

Diagram for Chemistry question 36 (figure 3)

Diagram for Chemistry question 36 (figure 4)

Diagram for Chemistry question 36 (figure 5)

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The correct match for the protons labeled in compound X in Column M with the corresponding chemical shifts (δ, ppm) in Column N is

Column M: P—H

; Q—H

; R—H

; S—H

Column N: I—7.00 (dd, J = 8.4, 7.3, 1.4 Hz, 1H); II—7.17 (dd, J = 8.4, 1.4 Hz, 1H); III—7.59 (dd, J = 8.4, 7.3, 1.4 Hz, 1H); IV—8.12 (dd, J = 8.4, 1.4 Hz, 1H).

Your answerChoose one option.

P → II; Q → III; R → I; S → IV

P → I; Q → IV; R → II; S → III

P → II; Q → IV; R → I; S → III

P → I; Q → III; R → II; S → IV

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