Each of the following is a noncovalent interaction except a carbon-hydrogen bond. The correct option is B.
Explanation:
Non covalent interaction: is the sharing of electron as weak bonds between hydrogen and other atom. Non covalent interaction have large roles in the maintenance of structures of biomolecules as proteins. In biological processes many times a transient bonds are formed between molecules for various functions. The interaction between atoms of the same molecule termed as intermolecular bonds are also non-covalent interactions.
Non- covalent bonds are present in the helix formation.
The non covalent interactions are hydrogen bonds, Van Der Waals forces dipole -dipole bonds and hydrobhic interactions.
The bonds formed in C-H is non-polar and thus are not involved in hydrogen bond hence non covalent interaction.
Ka and Kb values of weak acids and weak bases are small.
This is because weak acids and weak bases do not dissociate completely, favoring the reactants more than dissociating into the product of H+ or OH-.
An ionic equation refers to a chemical equation where the electrolytes in aqueous solution are demonstrated as dissociated ions. Generally, this is a salt dissolved in water, where the ionic species are succeeded by (aq) in the equation, to suggest that they are in aqueous solution.
Net ionic equation refers to a chemical equation for a reaction that lists only those species that takes part in the reaction. It is an equation, which demonstrates only the reactants taking part in the formation of a precipitate.
In the given case, balanced chemical equations is,
AgNO₃ (aq) + NaCl (aq) = AgCl (s) + NaNO₃ (aq)
Complete ionic equation:
Ag⁺ (aq) +NO₃⁻ (aq) + Na⁺ (aq) + Cl⁻ (aq) = AgCl (s) + Na⁺ (aq) + NO₃⁻ (aq)
Net Ionic equation:
Ag⁺ (aq) + Cl⁻ (aq) = AgCl (s) (Silver chloride settles as white precipitate)
The rate law for the reaction : r=k.[A]²
<h3>Further explanation</h3>
Given
Reaction
A ⟶ B + C
Required
The rate law
Solution
The rate law is a chemical equation that shows the relationship between reaction rate and the concentration / pressure of the reactants
For the second-order reaction it can be:
1. the square of the concentration of one reactant.
![\tt r=k[A]^2](https://tex.z-dn.net/?f=%5Ctt%20r%3Dk%5BA%5D%5E2)
2. the product of the concentrations of two reactants.
![\tt r=k[A][B]](https://tex.z-dn.net/?f=%5Ctt%20r%3Dk%5BA%5D%5BB%5D)
And the reaction should be(for second order) :
2A ⟶ B + C
Thus, for reaction above (reactant consumption rate) :
![\tt r=-\dfrac{\Delta A}{2\Delta t}=k[A]^2](https://tex.z-dn.net/?f=%5Ctt%20r%3D-%5Cdfrac%7B%5CDelta%20A%7D%7B2%5CDelta%20t%7D%3Dk%5BA%5D%5E2)
