- Trending Categories
Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?
(a) Wash the hand with saline solution
(b) Wash the hand immediately with plenty of water and apply a paste of sodium hydrogen carbonate
(c) After washing with plenty of water apply a solution of sodium hydroxide on the hand
(d) Neutralise the acid with a strong alkali
Correct Answer: (b) Wash the hand immediately with plenty of water and apply a paste of sodium hydrogen carbonate
Explanation: Washing the affected hand with plenty of water will reduce the concentration of the acid. The remaining traces of the acid can be neutralized by applying a paste of Hydrogen carbonate which is basic in nature.[Note: NaOH is not used because it is corrosive in nature.]
- Related Articles
- Baking soda is a mixture of :(a) Sodium carbonate and acetic acid(b) Sodium carbonate and tartaric acid(c) Sodium hydrogen carbonate and tartaric acid(d) Sodium hydrogen carbonate and acetic acid
- Write a balanced chemical equation with state symbols for the following reactions :(i) Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.(ii) Sodium hydroxide solution (in water) reacts with hydrochloric acid solution (in water) to produce sodium chloride solution and water.
- Hydrochloric acid reacts with a metal X to form a gas Y which burns with a ‘pop’ sound. Sodium hydroxide solution also reacts with the same metal X (on heating) to form the same gas Y.(a) Name X and Y(b) Write the chemical equation of the reaction of metal X with (i) Hydrochloric acid, and (ii) Sodium hydroxide solution.
- Name the gas evolved when zinc granules are treated/heated with:(a) Hydrochloric acid solution(b) Sodium hydroxide solution
- Name the gas produced when aluminium foil reacts with:(a) dilute hydrochloric acid.(b) Sodium Hydroxide solution.
- Sodium metal reacts vigorously with water.(a) Name the gas evolved when sodium reacts with water.(b) State whether the solution formed by the reaction of sodium with water is acidic or basic.
- A student placed a few drops of a liquid over a portion of the red litmus paper as shown here. He observed that the red litmus paper turned blue. The liquid could be :(1) dilute hydrochloric acid (2) dilute sodium hydroxide(3)water(4)dilute acetic acid"
- What would be the colour of litmus in a solution of sodium carbonate?
- (a) Substitute formulae for names and balance the following reaction:Calcium carbonate reacts with hydrochloric acid to produce calcium chloride, water and carbon dioxide gas.(b) Write balanced chemical equation with state symbols for the following reaction:Sodium hydroxide solution reacts with hydrochloric acid solution to produce sodium chloride solution and water.
- List the conclusions you will draw while studying the following properties of ethanoic acid :(a) Odour(b) Solubility in water(c) Effect on litmus paper(d) Reaction with sodium hydrogen carbonate
- The correct way of making a solution of acid in water is to(a) add water to acid(b) add acid to water(c) mix acid and water simultaneously(d) add water to acid in a shallow container
- What is formed when zinc reacts with sodium hydroxide?(a) Zinc hydroxide and sodium (b) Sodium zincate and hydrogen gas(c) Sodium zinc-oxide and hydrogen gas(d) Sodium zincate and water
- Sodium carbonate is a basic salt because it is a salt of(a) strong acid and strong base(b) weak acid and weak base(c) strong acid and weak base(d) weak acid and strong base
- Explain the following:(a) Lime water turns milky on passing carbon dioxide gas into it.(b) Bubbles are produced when acetic acid is added to a solution of sodium hydrogen carbonate.
- During electrolysis of a saturated solution of sodium chloride, where is :(a) Chlorine formed? (b) Hydrogen formed? (c) Sodium hydroxide formed?
Advertisements