At which plate boundary do frequent, large earthquakes, volcanic activity, and the formation of deep ocean and trenches occur? a. divergent. b. fault. c. convergent. d. formative

Option (C)

Explanation:

In a convergent type of plate boundary, the plates move towards each other. Due to the collision of plates, it results in the formation of a subduction zone where the denser plate subducts below the less dense plate. The subduction zone is marked by the presence of a narrow depression above it which is commonly known as the oceanic trench.

As the denser crust goes into the asthenosphere layer, the rocks undergo partial melting and mix with the magma, which then rises upward in the over-riding plate and leads to the formation of volcanoes.

The convergent plates are responsible for the occurrence of deep-focus earthquakes.

Thus, the correct answer is option (C).

here we have to get the change of moles on decrease the volume of the reaction in gas phase.

the   per the given options it will decrease by (d) 11-50%

we know, on decreasing the volume of the gas phase reaction the reaction moves to the product side.

the reaction:                     so₂cl₂ (g) = so₂ (g) + cl₂ (g)         total

the moles at equilibrium:   1 - α                 α               α           = 1+α

concentrations:                   1 - α               α               α           = 1 + α

(concentration = moles/volume, as volume is 1 l)

(where α is the degree of dissociation)

now the dissociation constant in terms of concentration is :

=  

or,

or,   = (at v = 1l)

the reaction:                     so₂cl₂ (g) = so₂ (g) + cl₂ (g)         total

the moles at equilibrium:   1 - α                 α               α           = 1+α

concentrations:               (1 - α)/0.5           α/0.5         α/0.5       = (1 + α)/0.5

thus, the dissociation constant in terms of concentration is :

or,  

=  

so, the change of 1 : 1/0.5

or, 1: 2

thus it will decrease by 50%.

or, as per the given options it will decrease by 11-50%

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.