Life Sciences
GATE XL year:2020 PYQs
Build your understanding with focused practice from past exam papers.
Questions 11–20 of 125. Imported answers require independent review unless marked reviewed.
Question 1
Open questionXL-PMCQ1 markNeeds review
An aqueous solution contains a mixture of
M NaCl and
M HCl. Choose the correct statement about this solution.Your answerChoose one option.
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Open questionXL-PMCQ1 markNeeds review
The coordination complex which has a distorted octahedral structure is (Given: Atomic numbers of V: 23; Mn: 25; Ni: 28; Cu: 29)
Your answerChoose one option.
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Open questionXL-PNAT1 markNeeds review
In naphthalene, the value of the integer “n” according to Hückel’s rule of aromaticity is _____.
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Open questionXL-PNAT1 markNeeds review
The azimuthal quantum number (
) of an electron in the
orbital of a copper atom (atomic number: 29) is _____.Log in to check the answer
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Open questionXL-PNAT1 markNeeds review
The standard enthalpy of reaction (in kJ mol
) for obtaining three moles of H
(g) from atomic hydrogen in gas phase is _____. (Given: Standard enthalpy of formation of atomic hydrogen in gas phase is 218 kJ mol
)Log in to check the answer
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Open questionXL-PMCQ2 marksNeeds review
The correct order of the first ionization energies of He, B, N and O in their corresponding ground state is
Your answerChoose one option.
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Open questionXL-PMCQ2 marksNeeds review
Based on the molecular orbital theory, which one of the following statements with respect to N
, N
, O
and O
is correct?Your answerChoose one option.
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Open questionXL-PMCQ2 marksNeeds review
Which one of the following statements is incorrect about the diborane molecule?
Your answerChoose one option.
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Open questionXL-PMCQ2 marksNeeds review
Given below are Newman projections of ethylene glycol and 1,2-difluoroethane about their respective C-C bonds. The most stable conformations (lowest energy) of ethylene glycol and 1,2-difluoroethane are
Your answerChoose one option.
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Open questionXL-PMCQ2 marksNeeds review
In the reaction given below, choose the condition that gives an anti-Markovnik’s product.
Your answerChoose one option.
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