GATE CY topic:chemical-sciences PYQs & Answers — Page 57

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topic:chemical-sciences

Questions 561–570 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 57 of 65

The major product of the following reaction sequence is

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Diagram for Chemistry question 31 (figure 2)

Diagram for Chemistry question 31 (figure 3)

Diagram for Chemistry question 31 (figure 4)

Diagram for Chemistry question 31 (figure 5)

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The major product formed in the following retro-aldol reaction is

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Diagram for Chemistry question 32 (figure 2)

Diagram for Chemistry question 32 (figure 3)

Diagram for Chemistry question 32 (figure 4)

Diagram for Chemistry question 32 (figure 5)

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The elimination product of the following reaction is

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I₂

CH₃I

CH₃COI

I₃⁻

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A one-dimensional anharmonic oscillator is treated by perturbation theory. The harmonic oscillator is used as the unperturbed system and the perturbation is

(

is a constant). Using only the first order correction, the total ground state energy of the anharmonic oscillator is

(Note: For a one-dimensional harmonic oscillator

)

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The O₂ coordinated to metal ion centres in oxy-myoglobin and oxy-hemocyanin exists, respectively, as

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superoxide and peroxide

superoxide and superoxide

peroxide and peroxide

superoxide and oxygen

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Spectroscopic ground state term symbols of cobalt ions in [Co(H₂O)₆]²⁺ and [CoCl₄]²⁻, respectively, are

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²T₁g and ⁴A₂

⁴T₁g and ⁴A₂

⁴T₂g and ⁴T₁

²T₁ and ⁴A₁

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Generally, the coordination number and the nature of the electronic absorption band (f → f transition) of lanthanide(III) ion in their complexes are, respectively,

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greater than 6 and sharp

6 and broad

less than 6 and sharp

greater than 6 and broad

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Second-order rate constant for the reaction between [Co(NH₃)₅X]ⁿ⁺ (n = 3 for X = NH₃ and H₂O; n = 2 for X = Cl⁻) and [Cr(H₂O)₆]²⁺ at room temperature varies with the X as

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NH₃ > H₂O > Cl⁻

Cl⁻ > H₂O > NH₃

NH₃ > Cl⁻ > H₂O

H₂O > NH₃ > Cl⁻

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For the following reaction sequence,

X and Y, respectively, are

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and

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For an inverse spinel, AB₂O₄, the A and B, respectively, can be

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Ni(II) and Ga(III)

Zn(II) and Fe(III)

Fe(II) and Cr(III)

Mn(II) and Mn(III)

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GATE CY topic:chemical-sciences PYQs

Question 31

Question 32

Question 33

Question 34

Question 35

Question 36

Question 37

Question 38

Question 39

Question 40