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1
KCET 2019
MCQ (Single Correct Answer)
+1
-0

The first ionisation enthalpy of the following elements are in the order :

A
C < N < Si < P
B
P < Si < N < C
C
P < Si < C < N
D
Si < P < C < N
2
KCET 2018
MCQ (Single Correct Answer)
+1
-0
Which of the following is the correct order of radius?
A
$\mathrm{H}^{-}>\mathrm{H}>\mathrm{H}^{+}$
B
$\mathrm{Na}^{+}>\mathrm{F}^{-}>\mathrm{O}^{2-}$
C
$\mathrm{F}^{-}>\mathrm{O}^{2-}>\mathrm{Na}^{+}$
D
$\mathrm{Al}^{3+}>\mathrm{Mg}^{2+}>\mathrm{N}^{3-}$
3
KCET 2018
MCQ (Single Correct Answer)
+1
-0
Which of the following is an amphoteric oxide?
A
$\mathrm{V}_2 \mathrm{O}_5, \mathrm{Cr}_2 \mathrm{O}_3$
B
$\mathrm{Mn}_2 \mathrm{O}_7, \mathrm{Cr}_2 \mathrm{O}_3$
C
$\mathrm{CrO}, \mathrm{V}_2 \mathrm{O}_5$
D
$\mathrm{V}_2 \mathrm{O}_5, \mathrm{~V}_2 \mathrm{O}_4$
4
KCET 2018
MCQ (Single Correct Answer)
+1
-0
The electronic configuration of transition element " $X$ ", $[\mathrm{Ar}] 3 d^5$ is oxidation state is +3 . What is its atomic number?
A
25
B
26
C
27
D
24
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