Chemistry
GATE CY topic:chemical-reactions PYQs
Build your understanding with focused practice from past exam papers.
Questions 481–490 of 650. Imported answers require independent review unless marked reviewed.
Question 16
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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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The total number of α and β particles emitted in the following radioactive decay is ________.
²³⁸₉₂U → ²¹⁰₈₂Pb
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An ideal gas occupies an unknown volume V liters (L) at a pressure of 12 atm. The gas is expanded isothermally against a constant external pressure of 2 atm so that its final volume becomes 3 L. The work involved for this expansion process is ________ cal. (Round off to two decimal places)
(Gas constant R = 0.082 L atm mol⁻¹ K⁻¹ = 2 cal mol⁻¹ K⁻¹)
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The entropy change for the melting of ‘x’ moles of ice (heat of fusion is 80 cal g⁻¹) at 273 K and 1 atm pressure is 28.80 cal K⁻¹. The value of ‘x’ is ______. (Round off to two decimal places)
(Molecular weight of water =18 g/mol)
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Consider a two-state system at thermal equilibrium having energies 0 and 2kᵦT for which the degeneracies are 1 and 2, respectively. The value of the partition function at the same absolute temperature T is __________. (Round off to two decimal places)
(kᵦ is the Boltzmann constant)
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Consider a system of three identical and distinguishable non-interacting particles and three available nondegenerate single particle energy levels having energies 0, ε and 2ε. The system is in contact with a heat bath of temperature T K. A total energy of 2ε is shared by these three particles. The number of ways the particles can be distributed is __________.
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In a 400 MHz ¹H NMR spectrometer, a proton resonates at 1560 Hz higher than that of tetramethylsilane. The chemical shift value of this proton is ____________ ppm. (Round off to one decimal place)
(Chemical shift of tetramethylsilane is fixed at zero ppm)
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Gas phase bond length and dipole moment of a compound (MX) is 3 Å and 10.8 D, respectively. The ionic character in gas phase MX is __________%. (Round off to one decimal place)
(1D = 3.336 × 10⁻³⁰ C m)
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