Explanation

When the reaction quotient (Qc) is equal to the equilibrium constant (Kc), the system is at equilibrium and is stable.

Qc = Kc indicates that the rates of forward and reverse reactions are equal, and the concentrations of reactants and products remain constant.

Explanation

The periodic table divided into S, P, d, and f block based on Electronic Configuration.

• S block: The s block includes the first two columns of the periodic table, which are the alkali and alkaline earth metals.
• P block: The p block includes the elements in the six columns on the right side of the periodic table.
• D block: The d block includes the elements in the ten columns in the middle of the periodic table. These are also known as the transition metals.
• F block: The f block includes the elements at the bottom of the periodic table, which are known as the inner transition metals or lanthanides and actinides.

Explanation

 Alkali metals are found in Group 1 of the periodic table.

Potassium (K) is located in Group 1, making it an alkali metal. 

Explanation

Aromatic hydrocarbons have a high carbon-to-hydrogen ratio, which leads to incomplete combustion and the production of soot when burned, resulting in a smoky flame. 

Explanation

Each molecule of water (H₂O) has 10 electrons (2 from hydrogen and 8 from oxygen).

Therefore, 1 mole of water has 10 moles of electrons.

So, 10 moles of water have 10 x 10 = 100 moles of electrons.

Explanation

Sepsis, chemosis, and proptosis following an ENT injection are indicative of a serious condition known as cavernous sinus thrombosis.

This occurs when a blood clot forms in the cavernous sinus

Typically due to an infection spreading from nearby structures such as the sinuses or the middle ear.

Explanation

 Cleavage is the tendency of a crystal to break along specific planes of weakness.

Copper, being a metal, has a unique atomic structure that doesn't exhibit distinct planes of weakness.

When stressed, it tends to deform rather than cleave, resulting in a jagged fracture. 

Explanation

 Though fluorine is more electronegative, chlorine has the highest electron affinity due to less electron-electron repulsion.

Explanation

 The crystal structures with a coordination number of 12 are Face-Centered Cubic (FCC) and Hexagonal Close-Packed (HCP).

In these structures, each atom is surrounded by 12 other atoms. 

Explanation

 The maximum number of electrons in an atom is given by the formula:  

Total electrons = 2n²  

For n = 4:  

2(1² + 2² + 3² + 4²) = 2(1 + 4 + 9 + 16) = 2(30) = 60  

But this is a misunderstanding. Each shell holds:

- n=1: 2  

- n=2: 8  

- n=3: 18  

- n=4: 32  

So total = 2 + 8 + 18 + 32 = 60, but this is not per atom.  

If n = 4 is the maximum principal quantum number, then the 4th shell is being filled.  

The maximum number of electrons that can exist in the 4th shell is:  

2n² = 2(4)² = 32