1
KCET 2021
MCQ (Single Correct Answer)
+1
-0

Which of the following pairs has both the ions coloured in aqueous solution? [Atomic numbers of

$$\mathrm{Sc}=21, \mathrm{Ti}=22, \mathrm{Ni}=28, \mathrm{Cu}=29, \mathrm{Mn}=25]$$

A
$$\mathrm{Sc}^{3+}, \mathrm{Mn}^{2+}$$
B
$$\mathrm{Ni}^{2+}, \mathrm{Ti}^{4+}$$
C
$$\mathrm{Ti}^{3+}, \mathrm{Cu}^{+}$$
D
$$\mathrm{Mn}^{2+}, \mathrm{Ti}^{3+}$$
2
KCET 2020
MCQ (Single Correct Answer)
+1
-0

Identify the set of paramagnetic ions among the following.

A
$$\mathrm{V}^{2+}, \mathrm{Co}^{2+}, \mathrm{Ti}^{4+}$$
B
$$\mathrm{Ni}^{2+}, \mathrm{Cu}^{2+}, \mathrm{Zn}^{2+}$$
C
$$\mathrm{Ti}^{2+}, \mathrm{Cu}^{2+}, \mathrm{Mn}^{3+}$$
D
$$\mathrm{Sc}^{3+}, \mathrm{Ti}^{3+}, \mathrm{V}^{3+}$$
3
KCET 2020
MCQ (Single Correct Answer)
+1
-0

For $$\mathrm{Cu}_2 \mathrm{Cl}_2$$ and $$\mathrm{CuCl}_2$$ in aqueous medium, which of the following statement is correct?

A
$$\mathrm{CuCl}_2$$ is more stable than $$\mathrm{Cu}_2 \mathrm{Cl}_2$$
B
Stability of $$\mathrm{Cu}_2 \mathrm{Cl}_2$$ is equal to stability of $$\mathrm{CuCl}_2$$
C
Both are unstable
D
$$\mathrm{Cu}_2 \mathrm{Cl}_2$$ is more stable than $$\mathrm{CuCl}_2$$
4
KCET 2019
MCQ (Single Correct Answer)
+1
-0

The elements in which electrons are progressively filled in $$4 f$$-orbital are called

A
actinoids
B
transition elements
C
lanthanoids
D
halogens
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