Class 10 Ammonia ICSE notes pdf

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Ammonia notes class 10, ICSE class 10 Ammonia notes, Preparation of Ammonia gas, Haber's process, Properties of Ammonia gas, analytical use of Ammonium hydroxide....

ICSE CHEMISTRY PRACTICE PAPER - PERIODIC TABLE - CHEMICAL BONDING - HYDROGEN CHLORIDE

ICSE CHEMISTRY CLASS 10 Organic Chemistry - 8

ICSE CHEMISTRY CLASS 10

Organic Chemistry - 8

a)      Name the following:

i) Catalyst used in the conversion of Ethene to Ethane.

ii) The reaction between Ethyl alcohol and Aceetic acid in presence of Conc.sulphuric acid.

iii) The gas released when Calcium carbide is treated with cold water.

iv) The process of removal of Carbon dioxide from a carboxylic acid.

v) The property of an element to form long chains of identical atoms.

     b)      State your observation when:

i)  Ethene passed through Bromine water.

ii) Acetylene gas is passed into Ammoniacal Silver nitrate

     c)      Give reason :

i) 90% of all known compounds are organic in nature.

ii) Ethene under goes addition reactions but Ethane does not.

iii) Alkenes are more reactive than alkanes.

d)     Distinguish between Ethene and Ethyne using a common reagent

      e)       Write the branched structures of the following compounds:

i) 2,2-di chloro butane             ii) Di methyl ether

iii) Ethanoic acid                     iv) Propanone (Acetone)

      f)      Write balanced equations for the following reactions:

i) Dehydration of Ethyl alcohol at 170⁰C using a dehydrating agent.

ii) Esterification of Acetic acid.

iii) Preparation of Ethane from Sodium propanoate.

iv) Chlorination of Metane

v) Hydrogenation of Acetylene.

vi) Reaction between 1,2-dibromo Ethane and alc.KOH on boiling.

CLASS 10 ICSE Chemistry - Practice paper 18

ICSE - PRACTICE PAPER 18

ELECTROLYSIS

a) Give one term for the following:

i) The decomposition of a chemical compound when electricity is passed through its aqueous solution or fused state resulting in the discharge of ions at respective electrodes.

ii) The electrolytic process in which impure metals are purified to pure metals.

iii) The process in which metals are extracted from their ores using electrolysis.

iv) Separation of ions of an electrovalent compound when dissolved in water.

v) Electrolytic deposition of a superior metal on the surface of a baser metal or article.

b) A, B and C are three water soluble compounds.

When their aqueous solutions are taken in the electrolytic cell and the key is on the following observations are seen.

If A is taken the bulb glows brightly, with B the bulb becomes dim but when C is taken the bulb does not glow.

Then choose the correct answer from A, B or C for the following statements.

i) The solution which contains molecules only.

ii) The solution which contains ions only.

iii) The solution which possesses ions and molecules.

c) If a compound of X(metal) and Y(non metal) is taken in fused state and electricity is passed through it then the ions of _______ migrate towards cathode and are __________ to X and deposits on the cathode where as Y is obtained at ____________.( cations, Anode, cathode, reduced, oxidized,X)

d) In electrolysis ___________ migrate to cathode and anions to __________. Anode________ electrons from anions where as cation gains electrons from __________. Cations are ___________ while anions are __________ to neutral atoms. (Cathode, gains, reduced, cations, anode, oxidized)

e) ____________  are responsible for the flow of current through the electrolytic solution. As we descend the electrochemical series containing cations, the tendency of the ions to get ___________ at the cathode increases. The _____________ the concentration of an ion in a solution, greater is the probability of its being discharged at its appropriate electrode. (reduced, free ions, oxidized, lower, higher, free electrons).

f) Here are some electrode reactions. State at which electrode these reactions take place.(anode/cathode).

Mention the change that the given ion/atom undergoes in each case.

i) Cu²⁺ + 2e^- à Cu

ii) Cu – 2e^- à Cu²⁺

iii) 2Br ^– – 2e^- à Br₂

g) Choose the correct answer for the following statements.

(SO₄^2-, Anode, Silver, cathode, OH^–, Iron, Copper)

i) The metal taken as anode during the electroplating of an article with Silver metal using Sodium argento cyanide.

ii) A metallic electrode which does not take part in an electrolysis reaction.

iii) The anion which is discharged with most difficulty.

iv) The oxidizing electrode.

h) ‘M’ is a metal which is above Hydrogen in the activity series of metals. Its oxide M₂O dissolves in water and forms corresponding hydroxide.

i) State whether the hydroxide is an electrolyte.

ii) Write the cathode reaction during its electrolysis.

iii) Write the product at anode when inert electrodes are used.

i) State your observations in the electrolysis of:

i) Fused Lead bromide using Graphite electrodes

Cathode:

Anode:

ii) Dil. Sulphuric acid using platinum electrodes

Cathode:

Anode:

iii) Copper sulphate solution using Copper electrodes

Cathode:

Anode:

j) Write balanced electrode reactions during the electrolysis of :

i) Fused Lead bromide using Graphite electrodes

Cathode:

Anode:

ii) Dil. Sulphuric acid using platinum electrodes

Cathode:

Anode:

iii) Copper sulphate solution using inert electrodes

Cathode:

Anode:

k) Give reason:

i) Iron is not used as anode in the electrolysis of fused PbBr₂.

ii) Electrolytic cell is made of Silica in the above process.

iii) Water is acidified with dil. Sulphuric acid before electrolysis.

iv) The blue colour of Copper sulphate solution does not fade when it is electrolysed using Copper electrodes.

v) Silver nitrate is a strong electrolyte but not used not used in the electroplating with Silver.

vi) In electroplating the article to be plated is always made cathode.

vii) Direct current must be used in electroplating.

viii) Aluminium is extracted by the electrolysis of its salt in fused state.

ICSE CHEMISTRY - PRACTICE PAPER 17

ICSE CHEMISTRY - PRACTICE PAPER 17

 Chapters : Periodic Table and Chemical Bonding

a)  Name/Give a term/State the following.

1.        A covalent compound which when dissolved in water behaves like an electrovalent compound.

2.        A bond formed by the transfer of electrons from an electropositive element to an electronegative element.

3.        The atom bearing two lone pairs of electrons in water molecule.

4.     A covalent compound in which the shared pair of electrons are unequally distributed between the atoms.

5.               The weak intermolecular force of attraction existing in covalent compounds.

6.      An element which has 1,2 or 3 valence electrons and lose electrons to form cations.

7.      An element which has 4,5,6 or 7 electrons in its valence shell and accept electrons to attain stable electronic configuration.

8.      A covalent compound which when dissolved in water behaves like an electrovalent compound.

9.      A polar covalent compound with one lone pair of electrons on Nitrogen atom.

10.  A non polar covalent molecule of identical atoms with one triple bond.

11.  A polar covalent compound which combines with H⁺ and forms Hydronium ion.

12.  The charged particle which attract one another in the formation of an electrovalent compound.

13.  A bond formed by the transfer of electrons from an electropositive element to an electronegative element.

14.  A bond formed by a shared pair of electrons with both electrons coming from the same atom.

  b) Classify the following as Oxidation or Reduction reactions.

i)   Fe --> Fe²⁺

ii)  Cl^{–   -->} Cl

iii)  O     --> O^2–

iv)   Na    -->   Na⁺

c) A, B, C and D are the elements with valence electrons 7,2, 4 and 1 respectively. Answer the following:

i)  Nature of the bonding between C and A.

ii) Formula of the compound between B and A.

iii) Nature of the bonding between D and A. and draw the electron dot structure of that compound.

iv)       If A is a non metal containing diatomic molecule then write balanced equation for the reaction between A and B.

d) Give reasons

1.      Electrovalent compounds are crystalline solids and have high boiling point and melting point.

2.      Electrovalent compounds are non volatile.

3.      Electrovalent compounds conduct electricity in fused or aqueous solution state but do not in solid state

		IA	IIA											IIIA		IVA		VA		VIA		VIIA	0
		1	2	3	4	5	6	7	8	9	10	11	12	13		14		15		16		17	18
1		A																					D
2		C	E											Q				W		X		Z
3		G	H											R		T				Y			J
4		M

i) State the number of shells present in ‘C’.

ii) Write the valencies of M, E and X.

iii) Formula of the compound between ‘E’ and ‘X’.

iv) What type of bonding is possible between A and Z.

v) Write the formula of the oxide of G.

vi) Which one has the highest electronegativity among the elements belonging to Period 3. (from the given table).

vi) Write the balanced equation for the reaction between E and Y.

vii) Identify the metalloids in the table.

d) Give reason why:

i) Electronegativity decreases in a group.

ii) Atomic radium decreases a period