Explanation

An oxidizing agent readily accepts electrons, and higher oxidation states of a metal generally indicate a greater tendency to gain electrons and act as an oxidizing agent. 

Mn⁴⁺:

While not as strong as MnO4-, Mn4+ is still a potent oxidizing agent due to its high oxidation state. 

Mn³⁺:

This ion is considered a particularly strong oxidizing agent because it readily reduces to Mn²+, a more stable configuration. 

Mn⁷⁺:

In the form of permanganate ion (MnO₄⁻), Mn⁷+ is the strongest oxidizing agent among the listed options.

It has the highest oxidation state of manganese and readily accepts electrons. 

Explanation

All gases will start effusing at the same time, but the rate of effusion depends on their molar mass (Graham’s Law).  

Lighter gases like H₂ effuse faster than heavier ones like Cl₂.

Explanation

 When a body moves against the force of friction on a horizontal plane, the work done by the body is negative.

This is because work is defined as the dot product of force and displacement,

And when moving against friction, the force of friction acts in the opposite direction to the displacement of the body,

Resulting in an angle of 180 degrees between them. 

Explanation

 Energy = Power × Time = 40 W × 3600 s = 144000 J

Explanation

Stokes' law applies to small spherical particles in viscous fluids. 

Stokes' law describes the drag force exerted on a spherical particle moving slowly through a viscous fluid.

And it is only valid for small, spherical particles moving in a laminar flow with low Reynolds numbers

Where the viscosity of the fluid plays a significant role. 

Explanation

The correct answer is:  All of the above

A complete revolution corresponds to an angular displacement of:

• 360°

• $2\pi$ radians

So, for 2 complete revolutions:

• Degrees: $2\times 360°=720°$

• Radians: $2 times 2pi = 4pi$ radians

• Approximate radians:

  $$4\pi \approx 4\times 3.14=12.56\text{ radians (rounded to 12.6)}$$

Explanation

Kinetic energy formula: KE = ½ mv²

Let initial KE = ½ * m * v²  

New KE = ½ * (3m) * (2v)²  

= ½ * 3m * 4v²  

= 6mv²  

Now divide new KE by original KE:  

(6mv²) / (½mv²) = 12 times

Explanation

The work done on a unit charge against an electric field intensity is called electric potential.

It is also known as voltage or potential difference.

It is measured in volts (V) and represents the energy transferred per unit charge.

Electric potential (V) = Work done (W) / Charge (Q)

V = W / Q

Explanation

Counterclockwise is the positive rotation direction

and clockwise is the negative direction.

For example, a torque that rotates an object counterclockwise is a positive torque

Explanation

 joule is a scalar quantity.

SI base units: kg⋅m2⋅s−2

Symbol: J

joule, a unit of work or energy in the International System of Units (SI)