A compound that has coloure in solid state is:

1. \(Ag_2SO_4\)

2. \(CuF_2\)

3. \(ZnF_2\)

4. \(Cu_2Cl_2\)

On addition of a small amount of KMnO₄, to concentrated H₂SO₄, a green oily compound is obtained which is highly explosive in nature. What is the compound ?
$1.<mspace\; width="1em"></mspace>{\mathrm{Mn}}_2{\mathrm{O}}_7$
$2.<mspace\; width="1em"></mspace>{\mathrm{MnO}}_2$
$3.<mspace\; width="1em"></mspace>{\mathrm{MnSO}}_4$
$4.<mspace\; width="1em"></mspace>{\mathrm{Mn}}_2{\mathrm{O}}_3$

The magnetic nature of elements depends on the presence of unpaired electrons. Which of the configuration of transition element will shows highest magnetic moment ?

$1.<mspace\; width="1em"></mspace>3{\mathrm{d}}^7$

$$
$2.<mspace\; width="1em"></mspace>3{\mathrm{d}}^5$

$$
$3.<mspace\; width="1em"></mspace>3{\mathrm{d}}^8$

$$
$4.<mspace\; width="1em"></mspace>3{\mathrm{d}}^2$

Which of the following elements does not belong to the actinoid series?
1. Uranium (U)
2. Neptunium (Np)
3. Thulium (Tm)
4. Fermium (Fm)

The electronic configuration of gadolinium (atomic number of 64) is:

1. $\left[\mathrm{Xe}\right]4{\mathrm{f}}^{3}5{\mathrm{d}}^{5}6{\mathrm{s}}^2$

2. $\left[\mathrm{Xe}\right]4{\mathrm{f}}^{7}5{\mathrm{d}}^{2}6{\mathrm{s}}^1$

3. $\left[\mathrm{Xe}\right]4{\mathrm{f}}^{7}5{\mathrm{d}}^{1}6{\mathrm{s}}^2$

4. $\left[\mathrm{Xe}\right]4{\mathrm{f}}^{8}5{\mathrm{d}}^{6}6{\mathrm{s}}^2$

The actinoid that can show oxidation states up to +7 is:

1. Am

2. Th

3. U

4. Np

An actinoid that does not have one electron in its 6d orbital is:

Which of the following has the highest spin-only magnetic moment value?

1. ${\mathrm{Ti}}^{3+}$

2. ${\mathrm{Mn}}^{2+}$

3. ${\mathrm{Fe}}^{2+}$

4. ${\mathrm{Co}}^{3+}$

Match Column I (Catalyst) with Column II (Process), and mark the appropriate option:

Codes:

Match the properties given in Column I with uses given in Column II