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JEE Main 2016 (Offline)
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Which of the following atoms has the highest first ionization energy?
A
Na
B
K
C
Sc
D
Rb
2
JEE Main 2016 (Offline)
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The main oxides formed on combustion of Li, Na and K in excess of air are, respectively :
A
LiO2, Na2O2 and K2O
B
Li2O2, Na2O2 and KO2
C
Li2O, Na2O2 and KO2
D
Li2O, Na2O and KO2
3
JEE Main 2016 (Offline)
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The hottest region of Bunsen flame shown in the figure below is :

JEE Main 2016 (Offline) Chemistry - s-Block Elements Question 107 English
A
region $$1$$
B
region $$2$$
C
region $$3$$
D
region $$4$$
4
JEE Main 2015 (Offline)
MCQ (Single Correct Answer)
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Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy?
A
BeSO4
B
BaSO4
C
SrSO4
D
CaSO4
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