GATE CY format:nat PYQs & Answers — Page 11

Questions 101–110 of 166. Imported answers require independent review unless marked reviewed.

Topic practice 166 questionsPage 11 of 17

Assuming no interaction between vibrational and rotational energy levels in HF, the frequency (in cm

, rounded off to the nearest integer) of the R branch line originating from

in its IR spectrum is ______

(Given: Rotational constant for HF = 19.35 cm

;

)

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The van der Waals constants

and

for gaseous CO are given as 1.49 L

atm mol

and 0.039 L mol

, respectively. The fugacity (in atm, rounded off to two decimal places) of CO at 35 °C and 95 atm is ________ (Given:

L atm K

mol

)

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At 30 °C, the vapor pressure and density of a 1.0 M aqueous solution of sucrose are 31.207 mm Hg and 1.1256 g/mL, respectively. If the vapor pressure of pure water at 30 °C is 31.824 mm Hg, the activity coefficient (rounded off to three decimal places) of water in the given solution is ________ (Given: The molar mass of sucrose = 342.3 g mol

)

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For the ring opening reaction of cyclopropane to propene at 25 °C, the pre-exponential factor is 4.3 × 10

. The entropy of activation (in J K

mol

, rounded off to two decimal places) is ________ (Given:

J s;

J K

;

J K

mol

)

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In a reaction, reactant X is converted to products Y and Z consecutively with rate constants 6.0 × 10

min

and 9.0 × 10

min

, respectively. If the initial amount of X is 12.5 moles, the number of moles (rounded off to one decimal place) of Y formed after 10 minutes is ________

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Among the following compounds, the number of compounds that DO NOT exhibit optical activity at room temperature is ________.

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The number of following diene(s) that undergo Diels-Alder reaction with methyl acrylate is ________.

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The number of ¹H NMR signals observed for the following compound is ______________.

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The number of CO stretching bands in IR spectrum of trigonal bipyramidal cis-M(CO)₃L₂ is ____________. (M = metal and L = monodentate ligand)

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On heating a sample of 25 mg hydrated compound (molecular weight = 250 g/mol) in thermogravimetric analysis, 16 mg of dehydrated compound remains. The number of water molecules lost per molecule of hydrated compound is ____________. (Molecular weight of water = 18 g/mol)

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GATE CY format:nat PYQs

Question 51

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Question 18