Explanation

Explanation

The reaction 2KMnO₄ + Cl₂ → 2KMnO₄ + 2KCl is  Oxidation reduction reaction. 

In this reaction, the oxidation number of chlorine changes from 0 in Cl₂ to -1 in KCl, which is considered reduction.

While the oxidation state of manganese and potassium remains the same in KMnO₄,

The overall reaction involves a transfer of electrons between chlorine and potassium, making it a redox reaction. 

Explanation

Molar mass of nitrogen (N): 14.01 g/mol 

Molar mass of hydrogen (H): 1.01 g/mol (3 H atoms in NH3) 

Molar mass of ammonia (NH3): 14.01 + (3 * 1.01) = 17.04 g/mol 

Percentage of nitrogen in NH3 = (14.01 / 17.04) * 100 = 82.23% 

This is very close to the provided option of 82.35%, which can be expressed as 14/17 * 100. 

Explanation

 A NiCad (Nickel-Cadmium) battery has a nickel oxide hydroxide (NiO2) cathode and a cadmium anode. 

Explanation

 As a reaction proceeds, the rate of reaction decreases because the concentration of reactants decreases, leading to fewer collisions and slower reaction. 

Explanation

 The Calvin cycle is also known as the C3 cycle or the light-independent reactions of photosynthesis.

It can also be referred to as the Calvin-Benson cycle or the reductive pentose phosphate cycle (RPP cycle). 

Explanation

  Cohesion refers to the attraction between water molecules due to their polar nature, allowing them to "stick" together. 

Explanation

Metal is a good conductor of heat, so it quickly transfers heat from the hot object (like tea or soup) to your hand.

Plastic is an insulator, meaning it does not transfer heat well, so it feels cooler to the touch.

Explanation

In a solution, the solute is the substance that dissolves, and the solvent is the one that does the dissolving.

In lemonade, lemon juice is the solute, and water is the solvent.

Explanation

Fractional distillation separates the components of petroleum based on their boiling points.

It produces useful products like petrol, diesel, kerosene, and more.