1
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
Which of the following nuclear reactions will generate an isotope?
A
neutron particle emission
B
positron emission
C
$$\alpha$$-particle emission
D
$$\beta$$-particle emission
2
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
Consider the reaction, 2A + B $$\to$$ products. When concentration of B alone was doubled, the half-life did not change. When the concentration of A alone was doubled, the rate increased by two times. The unit of rate constant for this reaction is
A
L mol-1 s-1
B
no unit
C
mol L-1 s-1
D
s-1
3
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
Regular use of which of the following fertilizer increases the acidity of soil?
A
Potassium nitrate
B
Urea
C
Superphosphate of lime
D
Ammonium sulphate
4
AIEEE 2007
MCQ (Single Correct Answer)
+4
-1
The actinoids exhibits more number of oxidation states in general than the lanthanoids. This is because :
A
the 5f orbitals are more buried than the 4f orbitals
B
there is a similarity between 4f and 5f orbitals in their angular part of the wave function
C
the actinoids are more reactive than the lanthanoids
D
the 5f orbitals extend further from the nucleus than the 4f orbitals

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