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- Molecular Basis of Inheritance NEET MCQ
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Molecular Basis of Inheritance Neetprep Objective for Students
A reaction is 50% complete in 2 hours and 75% complete in 4 hours. The order of this reaction is
a) 1
b) 2
c) 3
d) 0
Option a – 1
The decomposition of phosphine (PH₃) on tungsten at low pressure is a first-order reaction because
a) The rate is proportional to surface coverage
b) The rate is inversely proportional to surface coverage
c) The rate does not depend on surface coverage
d) The decomposition rate is very low
Option a – The rate is proportional to surface coverage
When the initial concentration of a reactant is doubled and the half-life remains unchanged, the order of reaction is
a) Second
b) Between zero and first
c) Zero
d) First
Option d – First
For a first-order reaction, if the concentration drops to 25% in one hour, the half-life of the reaction is
a) 2 hours
b) 4 hours
c) 0.5 hours
d) 0.25 hours
Option c – 0.5 hours
If 75% of a first-order reaction is completed in 30 minutes, the time required for 93.75% completion is (in minutes)
a) 45
b) 90
c) 120
d) 60
Option d – 60
In a zero-order reaction, when the concentration is reduced to one-fourth, the time required for half the reaction to complete
a) Remains unchanged
b) Becomes 4 times longer
c) Becomes one-fourth
d) Becomes double
Option a – Remains unchanged
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Also, check out:
- Molecular Basis of Inheritance NEET MCQ
- Mechanical Properties of Solids MCQ
- Isomerism Chapter Class 11
