Answer:
A food chain shows how energy flows from one organism to another. In general, energy flows from the Sun to producers and then to consumers. The path is linear as the energy present in one step is transferred to the next. You can find specific examples of this pathway in an ecosystem
What are " of the following"?
Answer:
The contributions are not listed in the question. I guess the following are the options you are talking about.
Same elements have same properties:
In 1803 Dalton gave the atomic theory that the properties of the atoms of the same element are same.
Electrons in Orbits:
Electrons were discovered in 1897 by J J. Thompson but the hypothesis of electrons in the orbits were given by Hantaro Nagaoka in 1904.
Plum pudding model:
Plum pudding model was given by J. J. Thompson in 1904 with the concept of positively charged medium containing the negatively charged electrons in it.
Positively Charged Atomic Nucleus:
Earnest Rutherford in 1911 discovered the positively charged atomic nucleus.
The correct answer is option C. The outcome of putting litmus paper into bleach would be that red paper turns blue, blue paper does not change. Domestic bleach is a strong base it typically has a pH of 11 to 13. So when testing for pH, it would really go with the basic characteristics.
Benzene is produced as a side product when water react with phenyl magnesium bromide during Grignard reactions.
<h3>What is Grignard Reaction ? </h3>
The Grignard reaction involves an R-Mg-X, a carbon chain bound to a magnesium halide, used to form alcohols by attacking carbonyls such as in aldehydes or ketones.
Here R act as a nucleophile and Mg-X act as a electrophile. Instead of attacking carbonyl, which is present in the reaction, the benzene ring will attack water molecules present around, grabbing a H⁺ and pushing away MgBr .
The required reaction is :
PhMgBr + H₂O → Ph-H + MgBrOH
Thus from the above conclusion we can say that it is always advised to use dry Grignard to avoid this reaction.
Learn more about the GRIGNARD REACTION here :
brainly.com/question/23971610
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