The alcohol that we use as disinfectant is a solution of ethyl alcohol and water held together by an intermolecular force of attraction (IMF) as shown in the figure. What type of IMF holds the alcohol and water in the solution?

(a)  

Arrange the gases below in the order of increasing rates of diffusion:

I: Ammonia, NH₃

II: Hydrogen,H₂

III: Oxygen, O₂

Atomic mass: O = 16 g/mol, N = 14 g/mol, H = 1g/mol,

(a)  

What is the hybridization of Phosphorus in PCl₅?

(a)  

Graphite, coal and diamond are allotropes of carbon. Of these 3 allotropes, what makes diamond the hardest element in the Moh’s scale of hardness? This is due to the difference in their:

(a)  

The picture represents a cell wall in solution, with red spheres being solute particles. What can be the condition of the solution surrounding the cell? The solution is:

(a)  

This syndrome is associated with COVID-19 virus and it occurs when the immune system accidentally attacks the nerves coming out of the spinal cord.

(a)  

Given the following standard reduction potentials in acid solution

O₂ +4H⁺ + 4e^– → 2H₂O E°= +1.23V

Sn⁴⁺ + 2e^– → Sn²⁺ E° = + 0.13 V

Zn²⁺+ 2e^– → Zn_(s) E° = –0.76 V

Write the formula of the WEAKEST reducing agent.

(a)  

The pH of a cup of coffee (at 25⁰C) was found to be 5.12. What is the hydronium-ion concentration?

(a)