ICSE CHEMISTRY CLASS 10 NITRIC ACID - 3

NITRIC ACID - 3

1.      The acid produced when conc. HNO₃ oxidizes Sulphur.

2.      A strong acid which on thermal decomposition gives nascent Oxygen atoms.

3.      A metal which can give Hydrogen gas with very dilute Nitric acid.

4.      A metal which shows passivity with conc. Nitric acid.

5.      The mixture of two concentrated acids which is used to dissolve Gold and Platinum.

6.      A compound which is used in photography.

7.      The compound which on thermal decomposition gives a buff residue along with reddish brown vapours.

8.      A crystalline blue salt which on heating gives a black residue with reddish brown vapours.

Give reasons

1.      Pure Nitric acid takes yellow brown colour when exposed to the light.

2.      Only all glass apparatus should be used in the laboratory preparation of Nitric acid.

3.      Iron is rendered passive with fuming Nitric acid.

4.      Nitric acid prepared in lab is in yellow colour.

5.      Dil. Nitric acid does not give Hydrogen gas with active metals.

6.      Higher ratio of air is used in Ostwald’s process.

State your observations

1.      Conc. Nitric acid is added to Copper turnings.

2.      Dil. Nitric acid is added to Copper turnings.

3.      Nitric oxide is passed into gas jar containing Oxygen gas.

4.      A salt containing nitrate ion is heated with conc. Sulphuric acid and Copper.

5.      Lead nitrate crystals are heated in a hard glass test tube.

ICSE CHEMISTRY Class 10 ORGANIC CHEMISTRY - 5

ICSE CHEMISTRY ORGANIC CHEMISTRY - 5

ORGANIC CHEMISTRY IMPORTANT QUESTIONS

Distinguish between the following pair of compounds:

1.      Ethane and Ethene

2.      Ethene and Ethyne

3.      Ethanoic acid and Ethane

Match the following.

1.      Esters

2.      Ethene

3.      Ethyne

4.      Ethyl chloride is boiled with alc.KOH

5.      Ethyl chloride is boiled with aq.KOH

6.      Neutral FeCl₃

7.      Hydrolysis of Ethyl acetate

8.      Methylated spirit

9.      Lab preparation of Ethyne

10.  Acetylene linkage

11.  Elimination of Carbon dioxide

12.  Decolourizes Bromine water

A.    Ethene

B.     Fruity smell

C.     Gives are a precipitate with Ammoniacal CuCl

D.    Ethyne

E.     Ethyl alcohol

F.      –CºC–

G.    Decarboxylation

H.    Ethyl alcohol containing Methyl  alcohol

I.       Ethyl alcohol + acetic acid

J.       CaC₂ + cold H₂O

CLASS 10 ICSE ORGANIC CHEMISTRY - 4

State your observations when:

1.      The gas which is obtained by the dehydration of Ethyl alcohol is passed into Bromine water.

2.      Acetic acid is heated with Ethyl alcohol in presence of conc. Sulphuric acid.

3.      Acetic acid is added neutral Ferric chloride solution.

4.      The gas obtained in the dehydrogenation of Ethyl bromide is passed through acidified Potassium permanganate solution.

5.      Acetylene is treated with Ammoniacal Silver nitrate solution.

6.      Ethyl alcohol is burnt in presence of sufficient Oxygen.

Give reasons

1.      Alkenes are more reactive than alkanes.

2.      Alkenes undergo addition reactions but alkanes do not.

3.      Hydrocarbons are excellent fuels.

4.      Pure Acetic acid is called glacial acetic acid.

5.      Alkenes decolourize Bromine water but alkanes do not.

Name the functional groups present in the following organic compounds:

1.      Ethanol

2.      Ethanoic acid

3.      Propanal

4.      Methoxy Methane

5.      Acetone

6.      Ethyl acetate

Class 10 ICSE Important questions ORGANIC CHEMISTRY - 3

ORGANIC CHEMISTRY - 3

Give a suitable term for the following.

1.      Displacement of Hydrogen atoms of a hydrocarbon by another atom.

2.      Elimination of Carbon dioxide from a carboxylic acid.

3.      Methyl iodide reacts with Sodium in presence of dry ether to produce Ethane.

4.      Methane reacts with Chlorine in UV light to produce Carbon tetra chloride.

5.      Elimination of the elements of water from Ethyl alcohol to produce Ethene.

6.      The reaction which involves removal Hydrogen halide.

7.      Conversion of unsaturated Hydrocarbons to saturated hydrocarbons.

8.      Simple molecules join to form large molecules.

9.      The reaction between Ethyl alcohol and Acetic acid to give Ethyl acetate.

10.  Preparation of Ethane from Ethyl acetate.

11.  Conversion of Ethane to Ethyl chloride.

12.  Methane in presence of Potassium dichromate gives Methanol.

13.  Ethyl alcohol on heating with Conc. Sulphuric acid gives Ethene.

14.  Ethyl chloride on boiling with alcoholic Potassium hydroxide gives Ethane.

15.  Ethene is converted to Ethane in presence of Nickel.

16.  Preparation of 1,1,2,2-tetra chloro Ethane from Ethyne.

17.  Alkyl halides on boiling with aqueous solution an alkali gives alcohols.

18.  Conversion of Carbohydrates to Ethyl  alcohol in presence of Enzymes.

19.  Condensation of an alcohol with a Carboxylic acid producing esters.

20.  The reaction in which Hydrogen atoms are replaced by halogen atoms.

Class 10 ICSE - ORGANIC CHEMISTRY Important questions - 2

ORGANIC CHEMISTRY Class 10 ICSE questions - 2

Name the following.

1.         The gas used in the manufacture of PVC and Mustard gas.

2.         The product formed in the chlorination of Ethene.

3.         The hydrocarbon with only two Carbons joined by a triple bond.

4.         The compound which liberates Acetylene on reaction with cold water.

5.         The colourless gas with faint garlic smell.

6.         The products formed in the Step I and step II of Hydrogenation of Ethyne.

7.         This gas reacts with Ammoniacal Cupric chloride and gives a red precipitate.

8.         This gas reacts with Ammoniacal Silver nitrate solution and gives a white precipitate.

9.         The hydroxyl derivatives of Ethane.

10.     This compound on hydrolysis in presence of aqueous Sodium hydroxide gives Ethyl alcohol.

11.     The compound formed when Ethyl alcohol reacts with Sodium.

12.     Ethyl alcohol reacts with acid and gives Ethyl acetate.

13.     The Ether formed when Ethyl alcohol is heated with Conc. Sulphuric acid.

14.     The alcohol used in thermometers and spirit levels.

15.     This alcohol when added to Ethanol makes it Methylated spirit.

16.     A monocarboxylic acid which contains two Carbons.

17.     This solution gives wine red colour solution with neutral FeCl₃.

18.     The product other than Ethyl alcohol in the hydrolysis of Ethyl acetate.

19.     This acid has pungent odour of Vinegar.

20.     The acid which forms ice-like solid on cooling.

21.     The main component of Marsh gas and natural gas.

22.     The salt obtained when Acetic acid reacts with Sodium hydroxide solution.

23.     The alcohol produced by the fermentation of Sucrose.

24.     Ethyl alcohol which contains large amount of Methyl alcohol.

Class 10 ICSE - ORGANIC CHEMISTRY - 1

ORGANIC CHEMISTRY - Important questions - 1

Name the following.

1.         The tetravalent non-metal which shows Catenation.

2.         The property of organic compounds having same molecular formula but different structural formula.

3.         A series of organic compounds where the successive members of that series follow a regular structural pattern.

4.         The hydrocarbons containing Carbon-Carbon multiple bond/s.

5.         The isomerism shown by the compounds differ in the arrangement of Carbon atoms in the chain.

6.         The functional group which is indicated by the secondary suffix ‘-oic acid’.

7.          Alkenes undergo this type of reactions.

8.         Theses organic compounds undergo substitution reactions.

9.         These compounds are also called as paraffins.

10.     The compound in which one Carbon atom is joined to four Hydrogen atoms by single covalent bonds.

11.     The gas produced when sodium propionate is heated with Soda lime.

12.     The gas produced when Sodium ethanoate is heated with Soda lime.

13.     The alkane obtained when Methyl iodide is reduced in presence of Zn/Cu couple.

14.     The reaction which is not suitable for the preparation of alkanes having even number of Carbons atoms.

15.     A hydrocarbon which contributes towards Green House Effect.

16.     The product formed in the step 3 of Chlorination of Methane.

17.     The product obtained in the final step of Chlorination of Methane.

18.     The gas produced when an Alkane burns in presence of sufficient Oxygen.

19.     The product obtained by the oxidation of Methane in a red hot Copper tube.

20.     The product formed when Methane is oxidized in presence of MoO as a catalyst.

21.     A Hydrocarbon used in the Manufacture of Carbon black used as a pigment in shoe polish.

22.     The hydrocarbons containing olefenic bond.

23.     The dehydrating agent used to prepare Ethene from Ethyl alcohol.

24.     The alkene produced when Ethyl alcohol is heated with Conc. Sulphuric acid at 170⁰C.

25.     The alkaline solution used to purify Ethane prepared from Ethyl alcohol.

26.     Dehydrogenation of Ethyl bromide in presence of this compound gives Ethene.

27.     An alkene which has a pleasant smell.

28.     The catalyst used in the hydrogenation of alkenes.

29.     The compound which is produced by dehydrohalogenation of Ethyl bromide and decolourises Bromine water.

30.     The alkene used in the artificial ripening of fruits and welding purposes.