Question
What are hormones ?
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Answer
→"Hormones are molecules that act as intracellular messengers. These are produced by endocrine glands in the body and are poured directly in the blood stream which transports them to the site of action."
→" In terms of chemical nature, some of these are steroids. e.g. estrogens and androgens, some are polypeptides for example insulin and endorphins and some others are amino acid derivatives such as epinephrine and norepinephrine.
→" In terms of chemical nature, some of these are steroids. e.g. estrogens and androgens, some are polypeptides for example insulin and endorphins and some others are amino acid derivatives such as epinephrine and norepinephrine.
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Similar questions
State how the following compounds obtained from benzoic acid 2.
(i) m-Nitrobenzoic acid (ii) m-Bromobenzoic acid
(i) m-Nitrobenzoic acid (ii) m-Bromobenzoic acid
Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Reason: Zinc is less reactive than copper.
- Both assertion and reason are true and the reason is the correct explanation of assertion.
- Both assertion and reason are true and the reason is not the correct explanation of assertion.
- Assertion is true but the reason is false.
- Both assertion and reason are false.
- Assertion is false but reason is true.
Reason: Zinc is less reactive than copper.
(a) Why in the redox titration of KMnO4 versus oxalic acid do we heat oxalic acid solution before starting the titration?
(b) What are the units of rate of a reaction?
(b) What are the units of rate of a reaction?
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Answer the following:
(a) The time required to decompose $SO _2 Cl _2$ to half of its initial amount is 60 min . If the decomposition is a first order reaction, calculate the rate constant of the reaction?
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→(a) The time required to decompose $SO _2 Cl _2$ to half of its initial amount is 60 min . If the decomposition is a first order reaction, calculate the rate constant of the reaction?
(b) The decomposition reaction of ammonia gas on platinum surface has a rate constant $k =2.5 \times 10^{-4}$ $mol L ^{-1} s^{-1}$. What is the order of the reaction?
Nitric oxide, NO, reacts with oxygen to produce nitrogen dioxide.
$\text{2NO(g)+O}_2(\text{g)}\rightarrow\text{2NO}_2\text{(g)}$
The rate law for this reaction is:
$\text{Rate = k}[\text{NO]}^2[\text{O]}_2$
Propose a machanism for the reaction.
→$\text{2NO(g)+O}_2(\text{g)}\rightarrow\text{2NO}_2\text{(g)}$
The rate law for this reaction is:
$\text{Rate = k}[\text{NO]}^2[\text{O]}_2$
Propose a machanism for the reaction.
Explain the mechanism of addition of HCl to propene.