Explanation
The work of chlorophyll is to absorb light energy from sunlight and transfer it to other molecules used for a process of photosynthesis. This energy is utilized in synthesize carbohydrates using $$CO_2$$.
Further, it also doesn't use in a reaction of photosynthesis hence it acts as the catalyst in this reaction.Complete balanced chemical equation is $$6H_2O + 6CO_2 \rightarrow C_6H_{12}O_6 + 6O_2$$
Hydrogenation is a chemical reaction between molecular hydrogen $$(H_2)$$ and another compound or element, usually in the presence of a catalyst such as nickel, palladium, or platinum. The process is commonly employed to reduce or saturate organic compounds.
The metal used as a catalyst in the hydrogenation of oil is:
A substance which alters the rate of reaction:
Catalyst is a substance that changes (usually increases) the rate of a reaction, without being involved in the reaction.A catalyst provides large surface area to one of the reactants, providing it an exposure to be reacted upon by the other reactant.
Which metal is used as a catalyst in the hydrogenation of oils?
Physisorption is the physical bonding of gas molecules to the surface of a solid or liquid that the gas comes into contact with at low temperatures. This occurs due to Van der Waals forces. The weak, long-range bonding is not surface specific and takes place between all gas molecules on any surface. The process, which does not involve any surface reaction, is achieved quickly at low temperatures, but surface coverage reduces with temperature increase. Physisorption is used when measuring the total surface area and in pore size analysis of mesopores, micropores and nanopores.
Physisorption is also known as physical adsorption.
Hence options A & B are correct.
Manganese dioxide lowers the activation energy which makes the reaction of decomposition of hydrogen peroxide to oxygen fast. It allows more molecules of $$H_2O_2$$ to undergo decomposition in a shorter period of time.
Balanced chemical equation of reaction is $$2H_2O_2(aq) \xrightarrow{{MnO_2(s)}} 2H_2O(l)+O_2(g)$$
Fog: Dispersed phase - Liquid and Dispersed medium - Gas Mist: Dispersed phase - Liquid and Dispersed medium - Gas Butter: Dispersed phase - Liquid and Dispersed medium - Solid Milk: Dispersed phase - Liquid and Dispersed medium - Liquid Smoke: Dispersed phase - Solid and Dispersed medium - Gas
Hint: Sol is a gel-like substance.
Correct Answer: Option A
Explanation:
Sol is a colloidal suspension when a solid is dispersed in a liquid.
An example of sol is a gel, blood, paint, etc.
A liquid is dispersed in a gas called aerosols.
A gas dispersed in liquid or solid called foam.
Final Answer: Sol is formed when solid is dispersed in the liquid.
A catalyst used in Rosenmund reaction can be prepared by reduction of $$palladium(II) \space chloride$$ solution in the presence of $$BaSO_4$$
The Palladium Catalyst used in Rosenmund’s reduction must be poisoned with $$BaSO_4$$ because the untreated catalyst $$Palladium (Pd)$$ is too reactive and will undergo over reduction forming other products.
An emulsion is a colloid of two or more immiscible liquids where one liquid contains a dispersion of the other liquids. In other words, an emulsion is a special type of mixture made by combining two liquids that normally don't mix.
Mayonnaise often abbreviated as mayo is a thick, creamy dressing often used as a condiment.
It is a stable emulsion of oil, egg yolk, and acid, either vinegar or lemon juice, with many options for embellishment with other herbs and spices. It is an emulsion.
Whereas Whipped cream is a colloid. It consists of a gas in a liquid, so it is foam, Fog is an example of liquid aerosol, Gelatin is a sol.
Hence the correct option is B.
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