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Standard XII
Mathematics
Composite Function
Choose the co...
Question

Choose the correct word/phrase from within the brackets to complete the following sentences​

(v) The product formed when ethene gas reacts with water in the presence of sulphuric acid (ethanol/ethanal/ethanoic acid)​

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Solution

The product formed when ethene gas reacts with water in the presence of sulphuric acid ethanol.​

CH2=CH2+H2O→CH3CH2OH ​

When ethene gas reacts with water it undergoes hydration to form ethyl alcohol.​​

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Q. Choose the correct word/phrase from within the brackets to complete the following sentences:
(i) The catalyst used for conversion of ethene to ethane is commonly __________ (nickel/iron/cobalt).
(ii) When acetaldehyde is oxidized with acidified potassium dichromate, it forms _________ (ester/ethanol/acetic acid).
(iii) Ethanoic acid reacts with ethanol in presence of concentrated H2SO4, so as to form a compound and water. The chemical reaction which takes place is called __________ (dehydration/hydrogenation/esterification).
(iv) Write the equation for the reaction taking place between 1, 2-dibromoethane and alcoholic potassium hydroxide.
(v) The product formed when ethene gas reacts with water in the presence of sulphuric acid is ________ (ethanal/ethanol/ethanoic acid).
Q. Ethanol can be converted to ethene which can then be changed to ethane.
Choose the correct word or phrase from the brackets to complete the following sentences:
(i) The conversion of ethanol to ethene is an example of ........... (dehydration, dehydrogenation).
(ii) Converting ethanol to ethene requires the use of ......... (concentrated hydrochloric acid, concentrated nitric acid, concentrated sulphuric acid).
(iii) The conversion of ethene to ethane is an example of ......... (hydration, hydrogenation).
(iv) The catalyst used in the conversion of ethene to ethane is commonly ............ (iron, cobalt, nickel).
Q.

Ethanol can be converted into ethene which can be changed into ethane. Choose the correct word or phrase from the brackets to complete the following sentences.

(a) The conversion of ethanol into ethene is an example of (dehydration, dehydrogenation).
(b) Converting ethanol into ethene requires the use of (conc. HCl, conc. HNO3,conc.H2SO4).
(c) The conversion of ethene into ethane is an example of (hydration, hydrogenation).
(d) The catalyst used in the conversion of ethene into ethane is commonly (iron, nickel, cobalt).

Q. Choose the correct word from the brackets to complete the sentences.
(i) Sulphur can be converted to sulphuric acid using ......... (concentrated/dilute) nitric acid.
(ii) Write the equation for the reaction in 2 (i).
Q.

Complete the following sentence, choosing the correct word from the brackets.
"Concentrated sulphuric acid is used in the laboratory preparation of nitric acid and hydrochloric acid because it is ................ (less volatile/stronger) in comparison to these two acids."

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