(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

Identify the term or substance based on the descriptions given below:

The compound formed where two alkyl are linked by group

\[\begin{array}{cc}
\ce{O}\\
\ce{-||-}\\
\ce{C}
\end{array}\]

Draw the structural formula for the following:

2, 3-dimethyl butane

Draw the structural formula for the following:

Diethyl ether

Draw the structural formula for the following :

propanoic acid

Give the structural formulae of the following:

2-methyl propane

Salts A, B, C, D and E undergo reactions (i) to (v) respectively. Identify the anion present in these salts on the basis of these reactions. Tabulate your answers in the format given below:
(i) When silver nitrate solution is added to asolution of A, a white precipitate, insoluble in dilute nitric acid, is formed.
(ii) Addition of dilute hydrochloric acid to B produces a gas which turns lead acetate paper black.
(iii) When a freshly prepared solution of ferrous sulphate is added to a solution of C and concentrated sulphuric acid is gently poured from the side of the test, a brown ring is formed.
(iv) When dilute sulphuric acid is added to D, a gas is produced which turns acidified potassium dichromate solution from orange to green.
(v) Addition of dilute hydrochloric acid to E produces an effervescence. The gas produced turns limewater milky but does not affect acidified potassium dichromate solution.

Give the structural formulae of the following :

Ethanoic acid

Give the structural formulae of the following :

Butna-2ol

Select from the list given (a to e) one substances in each case which matches the description given in parts (i) to (v). (Note : Each substance is used only one in the answer)
(a) Nitroso Iron (II) Sulphate
(b) Iron (III) chloride
(c) Chromium sulphate
(d) Lead (II) chloride
(e) Sodium chloride
(i) A compound which is deliquescent
(ii) A compound which is insoluble in cold water, but soluble in hot water
(iii) The compound responsible for the brown ring during the brown ring test of nitrate iron
(iv) A compound whose aqueous solution is neutral in nature
(v) The compound which is responsible for the green colouration when sulphur dioxide is passed through acidified potassium dichromate solution

Sodium hydroxide solution is added to the solutions containing the ions mentioned in List X. List Y gives the details of the precipitate. Match the ions with their coloured precipitates.

Give a chemical test to distinguish between the following pair of compounds:

Sodium chloride solution and sodium nitrate solution.

Give a chemical test to distinguish between the following pair of compounds:

Hydrogen chloride gas and hydrogen sulphide gas

State the inference drawn from the following observation :

On carrying out the flame test with a salt P a brick red flame was obtained. What is the cation in P?

State the inference drawn from the following observation:

A gas Q turns moist lead acetate paper silvery black. Identify the gas Q.

State your observation of the following case :
When excess sodium hydroxide is added to calcium nitrate solution

Identify the anion present of the following compound:
When barium chloride solution is added to salt solution E a white precipitate insoluble in dilute hydrochloric acid is obtained

Identify the salts P and Q from the observation given below:
When dilute HCl is added to a salt Q, a brisk effervescence is produced and the gas turns lime water milky. When NH₄OH soltion is added to the above mixture (after adding dilute HCl), it produces a white precipitate which is soluble in excess NH₄OH solution.

Draw the structural formula for the following:

Ethanoic acid

Give the structural formulae for the following:

An isomer of n-butane.

Give the structural formulae for the following:

2-propanol