Surface Chemistry
Get insights from 217 questions on Surface Chemistry, answered by students, alumni, and experts. You may also ask and answer any question you like about Surface Chemistry
Follow Ask QuestionQuestions
Discussions
Active Users
Followers
New answer posted
6 months agoContributor-Level 10
This is a Short Answers Type Questions as classified in NCERT Exemplar
Ans: The colloidal impurities present in water get coagulated by added alum, thus making water potable.
New answer posted
6 months agoContributor-Level 10
This is a Short Answers Type Questions as classified in NCERT Exemplar
Ans: It is a 4% solution of nitrocellulose in a mixture of alcohol and ether.
New answer posted
6 months agoContributor-Level 10
This is a Short Answers Type Questions as classified in NCERT Exemplar
Ans: Ice creams are emulsions which get stabilised by emulsifying agents like gelatin.
New answer posted
6 months agoContributor-Level 10
This is a Short Answers Type Questions as classified in NCERT Exemplar
Ans: Clouds are colloidal in nature and carry charge. Spray of silver iodide, an electrolyte, results in coagulation leading to rain.
New answer posted
6 months agoContributor-Level 10
This is a Short Answers Type Questions as classified in NCERT Exemplar
Ans: Gold sol is a lyophobic sol. Addition of gelatin stabilises the gold sol.
New answer posted
6 months agoContributor-Level 10
This is a Short Answers Type Questions as classified in NCERT Exemplar
Ans: At lower concentration soap forms a normal electrolytic solution with water. After a certain concentration called critical micelle concentration, colloidal solution is formed.
New answer posted
6 months agoContributor-Level 10
This is a Short Answers Type Questions as classified in NCERT Exemplar
Ans: Chemisorption involves formation of bond between gaseous molecules/atoms and the solid surface for which high activation energy is required. Thus it is referred to as activated adsorption.
New answer posted
6 months agoContributor-Level 10
This is a Short Answers Type Questions as classified in NCERT Exemplar
Ans: It is important to have clean surface as it facilitates the adsorption of desired species.
New answer posted
6 months agoContributor-Level 10
This is a Long Answers Type Questions as classified in NCERT Exemplar
Ans: Catalytic reaction which depends on the pore structure of catalyst and size of the reactant, product molecules is known as shape-selective catalysis. Zeolites are considered as good shape-selective catalysts due to their honeycomb-like structures. They are aluminosilicates with three-dimensional network of silicates wherein some of the silicon atoms are replaced by aluminium atoms giving Al-O-Si frame work. The reactions taking place in zeolites depends upon size and shape of reactant and product molecules, the pores and cavities of the zeolites also. They are fo
New answer posted
6 months agoContributor-Level 10
This is a Long Answers Type Questions as classified in NCERT Exemplar
Ans: This method is used for removing gangue from sulphide ores. In this, a suspension of powdered ore is made with water. To which both the collectors and froth stabilisers are added. Collectors for example pine oils, fatty acids, xanthates enhance non-wettability of the mineral particles and froth stabilisers such as cresols, aniline stabilise the froth.
Taking an Exam? Selecting a College?
Get authentic answers from experts, students and alumni that you won't find anywhere else
Sign Up on ShikshaOn Shiksha, get access to
- 66k Colleges
- 1.2k Exams
- 680k Reviews
- 1800k Answers