Chemistry
GATE CY purpose:exam-prep PYQs
Build your understanding with focused practice from past exam papers.
Questions 621–630 of 650. Imported answers require independent review unless marked reviewed.
Question 36
Open questionCYMCQ2 marksNeeds review
In cyclophosphazenes,
(X = F, Cl, Br and Me), the strength of P–N
-bond varies with X in the orderYour answerChoose one option.
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Open questionCYMCQ2 marksNeeds review
The structure type and shape of the polyhedral (skeletal) framework of the carborane,
, respectively, areYour answerChoose one option.
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Open questionCYMCQ2 marksNeeds review
If
is the octahedral splitting energy and P is the electron pairing energy, then the crystal-field stabilization energy (CFE) of
isYour answerChoose one option.
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Open questionCYMCQ2 marksNeeds review
The rates of substitution for the following reaction vary with L in the order
[Pt complex: Et₃P and Cl ligands in hashed wedges; L and PEt₃ ligands in solid wedges] + py → [Pt complex: Et₃P and py ligands in hashed wedges; L and PEt₃ ligands in solid wedges]⁺ + Cl⁻
L = CH₃⁻, Cl⁻, Ph⁻ and H⁻
Your answerChoose one option.
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Open questionCYMCQ2 marksNeeds review
The product formed in the reaction of
with
isYour answerChoose one option.
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Open questionCYMCQ2 marksNeeds review
For the following three alkenes, 1, 2 and 3, the rates of hydrogenation using Wilkinson’s catalyst at 25 °C vary in the order
1: cyclohexene; 2: alkene with CH₃ and C₂H₅ substituents on one alkene carbon and H on the other; 3: methyl-substituted cyclohexene
Your answerChoose one option.
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Open questionCYNAT2 marksNeeds review
undergoes
decay to
of its initial amount in 15 days. The time required for its decay to
of its initial amount is ______ days (up to two decimal places).Log in to check the answer
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Open questionCYMCQ2 marksNeeds review
The metal ion and the macrocyclic skeleton present in the green pigment of plants, respectively, are
Your answerChoose one option.
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Open questionCYMCQ2 marksNeeds review
The spinel structure of
has cubic close packed arrangement of oxide ions. The fractions of the octahedral and tetrahedral sites occupied by cations, respectively, areYour answerChoose one option.
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Open questionCYNAT2 marksNeeds review
The diffusion limiting current (
) at a dropping mercury electrode for an aqueous Mg(II) solution of concentration ‘c’ (mol L
) is 300 μA. If ‘c’ is increased by 0.1 mol L
,
increases to 900 μA. The value of ‘c’ (in mol L
) is ______ (up to two decimal places).Log in to check the answer
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