Download App

Practical Work — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryPractical Work3 Marks
Question
Using Sodium hydroxide solution, how would you distinguish: Ammonium sulphate from sodium sulphate.
✓

Answer

Ammonium sulphate on reacting with sodium hydroxide liberates ammonia gas:
$
\left. NH _4\right)_2 SO _4( aq )+2 NaOH ( I ) \longrightarrow Na _2 SO _4( aq )+2 NH _3( I )+2 H _2 O ( I )
$
Sodium sulphate on reacting with sodium hydroxide undergoes the following change:
$
NaOH + Na _2 SO _4 \longrightarrow NaOH + Na _2 SO _4
$
However the products would be the same as the reactants, therefore providing no observation for a visible chemical reaction.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[3 Mark Question Answer]" from Practical Work→Practical Work — all question types→Chemistry STD 10 question papers→ICSE Board STD 10 question papers→ICSE Board question paper generator→

Similar questions

Give equation for the reduction of Lead (II) oxide
→
Define a coordinate bond and give the conditions for its formation.
→
(a) What do you understand by the term electron affinity?
(b) Does electron affinity represent energy released or absorbed?
(c) Name an element having strong electron affinity.
→
Give the structural formulae of acetic acid? IUPAC name of acetic acid. What is glacial acetic acid?
→
Column A Column B
1. A substance that turns moist starch iodide paper blue. A. Ammonium sulphate
2. A compound which release a reddish brown gas on reaction with concentrated sulphuric acid and copper turnings. B. Lead carbonate
3. A solution of this compound gives dirty green precipitate with sodium hydroxide. C. Chlorine
4. A compound which on heating with sodium hydroxide produces a gas which forms dense white fumes with hydrogen chloride. D. Copper nitrate
5. A white solid which gives a yellow residue on heating E. Ferrous sulphate
→
(a) Distinguish between Qualitative and Quantitative analysis.
(b) Define Reagent
(c) Define Precipitate
→
Copy and complete the following table which relates to three homologus series of hydrocarbons:
General formula $C_nH_{2n}$ $C_nH_{2n-2}​​​​​​​$ $C_nH_{2n+2}​​​​​​​$​​​​​​​
IUPAC name of the homologus series      
Characteristic bond type     Single bond
IUPAC name of the first member of the series      
Type of reaction with chlorine   Addition  
→
What is an alloy? How do the properties of an alloy differ from its constituents?
→
The gases chlorine, nitrogen, ammonia and sulphur dioxide are collected under the same conditions of temperature and pressure. The following table gives the volumes of gases collected and the number of molecules (x) in 20 litres of nitrogen. You are to complete the table giving the number of molecules in the other gases in terms of x.
GasVolume (in litres)Number of molecules
Chlorine Nitrogen Ammonia Sulphur dioxide10 20 20 5x
→
Draw the orbit structure of the following:
$H_2$
→