1
WB JEE 2017
MCQ (Single Correct Answer)
+1
-0.25
C6H5F18 is a F18 radio-isotope labelled organic compound. F18 decays by positron emission. The product resulting on decay is
A
C6H5O18
B
C6H5Ar19
C
B12C5H5F
D
C6H5O16
2
WB JEE 2016
MCQ (Single Correct Answer)
+1
-0.25
If radium and chlorine combine to form radium chloride, the compound would be
A
half as radioactive as radium
B
twice as radioactive
C
as radioactive as radium
D
not radioactive
3
WB JEE 2016
MCQ (Single Correct Answer)
+1
-0.25
An element E loses one $$\alpha$$ and two $$\beta$$-particles in three successive stages. The resulting element will be
A
an isobar of E
B
an isotone of E
C
an isotope of E
D
E itself
WB JEE Subjects