EASYUPES B.Tech Admissions 2025
Ranked #42 among Engineering colleges in India by NIRF | Highest CTC 50 LPA , 100% Placements
Sodium Chloride and Sodium Hydroxide - Practice Questions & MCQ
Edited By admin | Updated on Sep 18, 2023 18:35 AM | #JEE Main
Quick Facts
-
Sodium Chloride and Sodium Hydroxide is considered one of the most asked concept.
-
28 Questions around this concept.
Solve by difficulty
A red solid is insoluble in water. However it becomes soluble if some KI is added to water. Heating the red solid in a test tube results in liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is
I2 + NaOH ( Hot ) ---->
The above reaction is a
Caustic soda is prepared by :
JEE Main 2025: Rank Predictor | Admit Card Link
JEE Main 2025 Memory Based Question: Jan 28- Shift 1 | Shift-2 | Jan 22, 23 & 24 (Shift 1 & 2)
JEE Main 2025: High Scoring Topics | Sample Papers | Mock Tests | PYQs
Caustic soda is prepared by:
In castner- Kellner cell when electrolysis of brine solution is carried out using mercury electrode which reaction takes place at cathode:
NaOH is used in :
The formula of caustic soda is :
The formula of caustic soda is:
The oxidation state of carbon in the product is :
JEE Main Exam's High Scoring Chapters and Topics
This free eBook covers JEE Main important chapters & topics to study just 40% of the syllabus and score up to 100% marks in the examination.
Download EBookWhen the brine solution is electrolyzed using carbon electrodes, which gas liberates at the cathode.
Concepts Covered - 0
Sodium Chloride and Sodium Hydroxide
Sodium Chloride(NaCl)
It is called common salt or rock salt or sea salt or table salt. Seawater has nearly 2.95% NaCl. 28% aqueous NaCl solution is called brine.
Preparation
It is mainly manufactured from seawater by evaporation in the sun. As it contains impurities of MgCl2, CaCl2, CaSO4 hence it is further purified by passing HCl gas where due to common ion effect pure NaCl gets precipitated.
Physical Properties
- It is a white crystalline solid and hygroscopic in nature.
- It melts at 1081K and boils at 1713K.
- It dissolves in water and the process of dissolution is endothermic.
- Its solubility is 36g per 100g of water at 273K. The solubility does not increase much with the increase in temperature.
Uses
- It is an essential constituent of our food.
- Ir is used in the manufacture of sodium, sodium hydroxide, washing soda, hydrogen chloride, chlorine, etc.
- It is used in freezing mixture.
- It is used for the preparation of soap.
- It is used for regenerating ion exchange resins.
Sodium Hydroxide(NaOH)
It is also known as caustic soda.
Preparation
Ir is prepared by the following methods:
- Gossage or Causticization Method
In this method, a suspension of lime [CaO+Ca(OH)2] is treated with sodium carbonate to obtain NaOH as follows:
- Lowig's Method
Here a mixture of sodium carbonate and ferric oxide is heated in a revolving furnace up to redness to get sodium ferrite which is first of all cooled and hydrolyzed by hot water into NaOH solution and insoluble ferric oxide. The solution is filtered and evaporated up to dryness to get the flacks of NaOH.
Physical Properties
- It is a white crystalline, deliquescent soapy solid with a meting point of 591.4K.
- It is highly soluble in water bur less soluble in alcohol.
- It is corrosive in nature and bitter in taste.
Uses
- The manufacture of soap, paper, artificial silk and a number of chemicals.
- In petroleum refining.
- In the purification of bauxite.
- In the textile industries for mercerising cotton fabrics.
- For the preparation of pure fats and oils,
- As a laboratory reagent.
"Stay in the loop. Receive exam news, study resources, and expert advice!"
Get Answer to all your questions
JEE Main Articles
Back to top