Explanation

The given compound is an ionic compound

It is made up of:

• one potassium
• one manganese,
• four oxygen atoms.

Oxidation numbers of potassium (K) and oxygen (O) are +1 and -2 respectively.

Let us assume that the oxidation number of Mn is $x$.

Since ionic compounds are neutral, the net charge on them is zero.

(Oxidation number of K) + (Oxidation number of Mn) + (4 $\times$ The oxidation number of O) = $0$

(1)$\times$(K) + (1)$\times$(Mn) + 4$\times$(O) = $0$

$(1)$$\times$(+1) + (1)$\times$($x$) + 4$\times$(-2) = $0$

$x$ = +7

Hence, the oxidation number of $\text{Mn}$ in ${\text{KMnO}}_4$ is +7.

Explanation

• If a reaction rate does not change with concentration, then it is Zero order.
• In zero-order reactions, the rate is constant and independent of the concentration of the reactants.
• It means that changes in concentration do not affect the reaction rate.

Explanation

Pakistan conducted a series of nuclear tests on 28 May 1998 at the Chagai test site, in Balochistan.

5 Nuclear tests were conducted by Pakistan at 15:15 hrs PST on 28 May 1998.

The tests were performed at Ras Koh Hills in the Chagai District of Balochistan Province.

Chagai-I was Pakistan's first public test of nuclear weapons.

while 

Chagai II

Chagai-II is the codename assigned to the second atomic test conducted by Pakistan, carried out on 30 May 1998

These tests followed the Chagai-I series

The test site was Kharan Desert, Pakistan

The number of tests is 1

Explanation

In a reverse-biased PN junction, the reverse current is typically very small, usually in the range of microamperes (μA).

This current is primarily due to minority charge carriers.

Explanation

Quaternary

(Haemoglobin has a quaternary structure as it consists of multiple polypeptide chains.)

Explanation

The reactivity of aldehydes towards nucleophilic addition depends on the size of the alkyl group attached to the carbonyl carbon.

Formaldehyde (HCHO) has no alkyl groups attached to the carbonyl carbon, making it the most reactive

Because there is no steric hindrance, and the electron-donating effect is minimal.

Explanation

A carbocation is a carbon atom with a positive charge attached to three other atoms or groups.

Explanation

Potassium ferrocyanide ​ [K[Fe(CN) 6] is an example of a complex salt

Because it contains a central metal atom (iron) bonded to ligands (cyanide ions)

Explanation

The peptidoglycan cell wall is a unique and defining feature of bacteria.

It provides structural support and protection, helping bacteria maintain their shape.

Peptidoglycan is not found in amoeba, protozoa, or viruses, as these organisms have different structural components.

Explanation

The depletion of the ozone layer is primarily caused by the release of chlorofluorocarbons (CFCs).

It break down ozone molecules, reducing the protective layer that shields the Earth from harmful UV radiation.