Chemistry Set 1 2017-2018 (English Medium) ICSE Class 10 Question Paper Solution

The salt solution which does not react with ammonium hydroxide is :

Calcium Nitrate

Zinc Nitrate

Lead Nitrate

Copper Nitrate

The organic compound which undergoes substitution reaction is :

(A) `C_2H_2`

(B) `C_2H_4`

(C) `C_10H_18`

(D) `C_2H_6`

The electrolysis of acidified water is an example of :

(A) Reduction

(B) Oxidation

(C) Redox reaction

(D) Synthesis

The IUPAC name of dimethyl ether is

(A) Ethoxy methane

(B) Methoxy methane

(C) Methoxy ethane

(D) Ethoxy ethane

The catalyst used in the contact process is

(A) Copper

(B) Iron

(C) Vanadium pentoxide

(D) Manganese dioxide

The energy released when an electron is added to a neutral gaseous isolated atom to form a negatively charged iron.

A process of formation of ions from molecules which are not in the ionic state

Give one word/a phase/term/process for the following statement:

The tendency of an element to form chains of identical atoms.

The property by which certain hydrated salts, when left exposed to the atmosphere, lose their water of crystallization and crumble into powder.

The process by which sulphide ore is concentrated.

Write balanced chemical equations to show : The oxidizing action of conc. Sulphuric acid on carbon

Write a balanced chemical equation for the reaction of sodium hydroxide solution with iron (III) chloride solution

Write a balanced chemical equation for the action of heat on aluminium hydroxide.

Write a balanced chemical equation for the reaction of zinc with potassium hydroxide solution.

Write a balanced chemical equation for Action of dilute hydrochloric acid on magnesium sulphite.

Give the IUPAC name for of the following :

Give the IUPAC name of the following:

\[\begin{array}{cc}
\phantom{}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{..}\\
\phantom{}|\phantom{....}|\phantom{....}|\phantom{..}\\
\ce{H - C - C - C - OH}\\
\phantom{}|\phantom{....}|\phantom{....}|\phantom{..}\\
\ce{\phantom{}H\phantom{...}H\phantom{...}H\phantom{..}}
\end{array}\]

Give the IUPAC name for the following

Write the structural formula of the two isomers of butane

State one relevant observation for the following.

Lead nitrate solution is treated with sodium hydroxide solution dropwise till it is excess.

State one relevant observation for the following:

At the anode, when molten lead bromide is electrolyzed using graphite electrodes.

State your observation when dilute hydrochloric acid is added to a lead nitrate solution and the mixture is heated.

State one relevant observation for the following:

Anhydrous calcium chloride is exposed to air for some time.

State your observations when Barium chloride solution is mixed with Sodium Sulphate Solution.

Why do ionic compounds have high melting points?

Give a reason for Inert gases do not form ions.

Give a reason for Ionisation potential increases across a period, from left to right

Give a reason for Alkali metals are good reducing agents.

Give a reason for Conductivity of dilute hydrochloric acid is greater than that of acetic acid

Name the gas that is produced in the given cases :

Sulphur is oxidized by concentrated nitric acid.

Name the gas that is produced in the given cases :

An action of dilute hydrochloride acid on sodium sulphide.

Name the gas that is produced in the given case:

The action of cold and dilute nitric acid on copper

Name the gas that is produced in each of the given case :

At the anode during the electrolysis of acidified water.

Name the gas that is produced in the given case:

The reaction of ethanol and sodium.

Ionic or electrovalent compounds do not conduct electricity in their _______ state. (fused/solid)

Electrolysis of aqueous sodium chloride solution will form ________ at the cathode. (Hydrogen gas / Sodium metal)

Dry hydrogen chloride gas can be collected by ________ displacement of air. (downward / upward)

The most common ore of iron is ________. (Calcium / Haematite)

The salt prepared by the method of direct combination is _______.

Iron (II) chloride \[\ce{(FeCl2)}\]

Iron (III) chloride \[\ce{(FeCl3)}\]

What do you understand by a lone pair of electrons?

Draw the electron dot diagram of Hydionium ion (H = 1; O = 8)

In Period 3 of the Periodic Table, element B is placed to the left of element A. On the basis of this information, choose the correct word from the option to complete the following statement:

The element B would have ______ metallic character than A.

lower

higher

In Period 3 of the Periodic Table, element B is placed to the left of element A. On the basis of this information, choose the correct word from the option to complete the following statement:

The element A would probably have ______ electron affinity than B.

lesser

higher

In Period 3 of the Periodic Table, element B is placed to the left of element A. On the basis of this information, choose the correct word from the option to complete the following statement:

The element A would have ______ atomic size than B.

greater

smaller

Copy and complete the following table which refers to the conversion of ions to neutral particles.

Write the balanced chemical equation to prepare ammonia gas in the laboratory by using an alkali.

State why concentrated sulphuric acid is not used for drying ammonia gas

Why is ammonia gas not collected over water?

Name the acid used for the preparation of hydrogen chloride gas in the laboratory. Why is this particular acid preferred to other acids?

Write the balanced chemical equation for the laboratory preparation of hydrogen chloride gas.

For the preparation of hydrochloric acid in the laboratory:

Why is the direct absorption of hydrogen chloride gas in water not feasible?

For the preparation of hydrochloric acid in the laboratory:

What arrangement is done to dissolve hydrogen chloride gas in water?

For the electro-refining of copper: What is the cathode made up of?

For the electro-refining of copper: Write the reaction that takes place at the anode

The percentage composition of a gas is Nitrogen 82.35%, Hydrogen 17.64%. Find the empirical formula of the gas.  [N = 14, H = 1]

Aluminium carbide reacts with water according to the following equation :

`Al_4C_3 + 12H_2O-> 4Al(OH)_3 + 3CH_4`

1)What mass of aluminium hydroxide is formed from 12g of aluminium carbide?

2) What volume of methane at s.t.p. is obtained from 12g of aluminium carbide?

[Relatively molecular weight of `Al_4Cl_3 = 144; Al(OH)_3 = 78]`

If 150 cc of gas A contains X molecules, how many molecules of gas B will be present in 75 cc of B?. The gases A and B are under the same conditions of temperature and pressure.

Name the law om which same conditions of temperature and pressure

State the main components of the following alloys:

Brass

State the main components of the following alloys:

Duralumin

Complete the following table which relates to the homologous series of hydrocarbons.

Name the most common ore of the metal aluminium from which the metal is extracted. Write the chemical formula of the ore.

Name the process by which impure ore of aluminium gets purified by using the concentrated solution of an alkali.

Write the equation for the formation of aluminium at the cathode during the electrolysis of alumina.

A compound X (having the vinegar-like smell) when treated with ethanol in the presence of the acid Z, gives a compound Y which has a fruity smell.

The reaction is:

1) Identify Y and Z.

2) Write the structural formula of X.

3) Name the above reaction.

Ethane burns in oxygen to form CO₂ and H₂O according to the equation:

`2C_2H_6+7O_2 -> 4CO_2 + 6H_2O`

If 1250 cc of oxygen is burnt with 300 cc of ethane.

Calculate:

1) the volume of `CO_2` formed

2) the volume of unused `O_2`

Three solutions P, Q and R have pH value of 3.5, 5.2 and 12.2 respectively. Which one of these is a:

1) Weak acid?

2) Strong alkali?

Give a chemical test to distinguish between the given pairs of chemicals:

Lead nitrate solution and Zinc nitrate solution

Give a chemical test to distinguish between the given pairs of chemicals:

Sodium chloride solution and Sodium nitrate solution

Write a balanced equation for the preparation of the following salts:

Copper sulphate from Copper Carbonate.

Write a balanced equation for the preparation of the following salts:

Zinc carbonate from Zinc sulphate

What is the type of salt formed when the reactants are heated at a suitable temperature for the preparation of Nitric acid?

Which property of sulphuric acid is shown by the reaction of the concentrated sulphuric acid with Ethanol?

Which property of sulphuric acid is shown by the reaction of the concentrated sulphuric acid with carbon?