- Total number of questions: 123
- 0 questions carry one mark each
- 123 questions carry two marks each
- Negative marking: 1/3 of the marks allotted to the question
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Exam Details
Life Sciences (XL) 2009
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Questions
123
Duration
180 mins
Package
Life Sciences (XL) - Previous Year Papers
Paper pattern & analysis
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Topic distribution
Subtopic distribution
Difficulty distribution
123questions
Easy
121
98.4%
Hard
2
1.6%
Question type distribution
123questions
Multiple Choices
123
100%
Instructions
Life Sciences (XL) 2009 – Instructions
Syllabus
Full Syllabus
Sample questions from this paper
Questions are selected across the paper subjects wherever the paper contains that variety.
2009 · Unclassified
Life Sciences (XL) 2009
For a second order reaction, R → P, the relation between half-life time (t1/2) and the initial reactant concentration [R]0 is
2009 · Unclassified
Life Sciences (XL) 2009
The reversible and irreversible entropy changes of a system on going from state '1' to state '2' are ΔS12rev and ΔS12irr respectively. The correct relationship between the two entropy changes is
2009 · Unclassified
Life Sciences (XL) 2009
Among the following molecules the one that is planar is
2009 · Unclassified
Life Sciences (XL) 2009
Among the following molecules the one that exhibits only one isomer is
2009 · Unclassified
Life Sciences (XL) 2009
The most stable carbocation among the following is
A
CH₃OCH₂CH₂
B
CH₃CH=CHCH₂
C
CH₃CH₂
D
2009 · Unclassified
Life Sciences (XL) 2009
The carboxylic acid with the lowest pKa value is