1
KCET 2025
MCQ (Single Correct Answer)
+1
-0

$$ \text { Given below and the atomic masses of the elements: } $$

$$ \begin{array}{|l|l|l|l|l|l|l|l|l|l|} \hline \text { Element: } & \mathrm{Li} & \mathrm{Na} & \mathrm{Cl} & \mathrm{~K} & \mathrm{Ca} & \mathrm{Br} & \mathrm{Sr} & \mathrm{I} & \mathrm{Ba} \\ \hline \text { Atomic Mass }\left(\mathrm{g} \mathrm{~mol}^{-1}\right): & 7 & 23 & 35.5 & 39 & 40 & 80 & 88 & 127 & 137 \\ \hline \end{array} $$

$$ \text { Which of the following doesn't form triad? } $$
A
$\mathrm{Ba}, \mathrm{Sr}, \mathrm{Ca}$
B
$\mathrm{Cl}, \mathrm{Br}, \mathrm{I}$
C
$\mathrm{Cl}, \mathrm{K}, \mathrm{Ca}$
D
$\mathrm{Li}, \mathrm{Na}, \mathrm{K}$
2
KCET 2023
MCQ (Single Correct Answer)
+1
-0

The correct order of first ionisation enthalpy of given elements is

A
$$\mathrm{Li}<\mathrm{B}<\mathrm{Be}<\mathrm{C}$$
B
$$\mathrm{Be < Li < B < C}$$
C
$$\mathrm{C}<\mathrm{B}<\mathrm{Be}<\mathrm{Li}$$
D
$$\mathrm{Li}<\mathrm{Be}<\mathrm{B}<\mathrm{C}$$
3
KCET 2023
MCQ (Single Correct Answer)
+1
-0

A pair of amphoteric oxides is

A
$$\mathrm{Al}_2 \mathrm{O}_3, \mathrm{Li}_2 \mathrm{O}$$
B
$$\mathrm{BeO}, \mathrm{BO}_3$$
C
$$\mathrm{BeO}, \mathrm{MgO}$$
D
$$\mathrm{BeO}, \mathrm{ZnO}$$
4
KCET 2023
MCQ (Single Correct Answer)
+1
-0

In which one of the following pairs, both the elements does not have $$(n-1) d^{10} n s^2$$ configuration in its elementary state?

A
$$\mathrm{Zn}, \mathrm{Cd}$$
B
$$\mathrm{Cd}, \mathrm{Hg}$$
C
$$\mathrm{Hg}, \mathrm{Cn}$$
D
$$\mathrm{Cu}, \mathrm{Zn}$$
KCET Subjects
EXAM MAP