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प्रश्न
What are catalysts?
उत्तर
Catalyst is a substance which increases the rate of a reaction without causing any disturbance to it.
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संबंधित प्रश्न
In order to study saponification reaction, we first prepare 20% solution of sodium hydroxide. If we record the temperature of this solution just after adding sodium hydroxide flakes to water and also test its nature using litmus, it may be concluded that the process of making this solution is
(A) exothermic and the solution is alkaline
(B) endothermic and the solution is alkaline
(C) endothermic and the solution is acidic
(D) exothermic and the solution is acidic
Give a reason for Conductivity of dilute hydrochloric acid is greater than that of acetic acid
Give the common names and IUPAC names of the following compounds of CH3COOH.
Give the common name and IUPAC name of C2H5OH.
Which of the following will give brisk effervescence with sodium hydrogen carbonate and why?
CH3COOH, CH3CH2OH
Describe a test for carboxylic acid.
What type to compound is CH3COOH?
How does ethanoic acid react with sodium hydrogen carbonate? Give equation of the reaction which takes place.
When ethanoic acid reacts with sodium hydrogen carbonate, then a salt X is formed and a gas Y is evolved. Name the salt X and gas. Y Describe an activity with the help of a labelled diagram of the apparatus used to prove that the evolved gas is the one which you have named. Also write the chemical equation of the reaction involved.
The structural formula of an ester is :
Write the formula of the acid and the alcohol from which it is formed.
Give the structural formulae of acetic acid.
A student takes 2 mL acetic acid in a dry test tube and adds a pinch of sodium hydrogen carbonate to it. He makes the following observations:
I. A colourless and odourless gas evolves with a brisk effervescence.
II. The gas turns lime water milky when passed through it.
III. The gas burns with an explosion when a burning splinter is brought near it.
IV. The gas extinguishes the burning splinter that is brought near it.
The correct observations are:
(A) I, II, and III
(B) II, III and IV
(C) III, IV and I
(D) IV, I and II
On adding NaHCO3 to acetic acid, a gas is evolved which turns lime water milky due to the formation of:
(1) Calcium bicarbonate
(2) Calcium hydroxide
(3) Calcium carbonate
(4) Calcium acetate
Explain the following term with an example.
Oxidant
Under what conditions does ethane get converted to ethyl alcohol?
Name the first four members of alphatic carboxylic acid.
Fill in the blank with appropriate word/words.
Vinegar is a solution of about ________per cent ________in water.
Choose the correct answer:
Select the acid which contains four hydrozen atoms in it.
State how the following conversions can be carried out:
Ethene to Ethyl alcohol
