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9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -கற்கண்டு (இலக்கணம்) - தொடர் இலக்கணம், ஆகுபெயர் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -விரிவானம் (துணைப்பாடம்) - தாய்மைக்கு வறட்சி இல்லை! Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் -கவிதை பேழை (செய்யுள்) - மார்கழி பெருவிழா Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உயிருக்கு வேர்-இலக்கணம் - பகுபத உறுப்பிலக்கணம் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil அமுதென்று பேர் - இலக்கணம்-எழுத்து -அளபெடை Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil அமுதென்று பேர்-துணைப்பாடம் - ஆறாம்திணை Important Questions And Answers Study Material - QB365 Set A
Published on: 12/09/2019
Applied Chemistry
Download Tamil Nadu 9th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
Chlorinated hydrocarbons are used as
fertilizers
pesticides
food colourants
preservatives
2.
The groups responsible for the colour of an organic compound is called
isotopes
auxochrome
chromogen
chromophore
3.
Which of the following does not contain natural dyes?
Potato
Beetroot
Carrot
Turmeric
4.
_____________ is a chemical used in finger print analysis.
5.
Aspirin is an _____________
6.
____________ is an electrochemical cell which converts electrical energy into chemical change(Reaction).
7.
Nanorobotics
8.
Nanoparticle
9.
Hyperthyroidism
10.
Corrosion prevention
11.
Antipyretics
12.
What is Forensic chemistry related to?
13.
What is Chemotherapy?
14.
Name various food additives and explain their functions.
15.
Draw the cell diagram of Daniel cell. Give its reactions.
1.
(b)
pesticides
2.
(d)
chromophore
3.
(a)
Potato
4.
( )
Ninhydrin
5.
( )
Analgesic and Antipyretic
6.
( )
Electrolytic cell
7.
Cancer cell identification
8.
Large surface area
9.
Iodine -131
10.
Electroplating
11.
Fever
12.
Forensic chemistry applies scientific principles, techniques and methods to investigate a crime.
13.
Treatment of certain diseases by destroying the invading organism without damaging the cells of the host, by the use of certain organic compounds is known as Chemotherapy. It is widely used for treating cancer.
14.
Food additives:
These are the chemicals added to food for specialized functions as a preservatives, colourants, artificial sweeteners, flavour enhancers, Antioxidants.
| Type of additive | Function of the additive | Example |
| Preservatives | They protect food from spoilage by microorganism in storage. | Vinegar, Sodium benzoate, benzoic acid, sodium nitrite |
| Colourants | They give pleasant colours to food | Carotenoids, Anthocyanin, Curcumin |
| Artificial Sweeteners | They add sweet taste to food | Saccharin, Cyclamate |
| Flavor enhancers | They are used to enhance the flavour of food items | Monosodium glutamate, Calcium diglutamate |
| Antioxidants | They prevent the oxidation of food. They protect us against cardiovascular disease. | Vitamin C, Vitamin E, Carotene |
15.
1. In Daniel cell zinc metal acts as anode and copper metal acts as cathode .
2. Aqueous zinc sulphate solution makes the anodic electrolyte. Whereas aqueous copper sulphate solution makes the cathodic electrolyte.
3. Saturated solution of potassium chloride (KCl) acts as salt bridge .
4. At anode, zinc undergoes oxidation losing its electrons .
. Zn(S) ⟶ Z2++ 2e- (Oxidation)
5. At cathode, copper ions from cathodic electrolyte gain electrons at the surface of cathode and get reduced to copper metal.
Cu2+ + 2e- ⟶ Cu(S)(Reduction)
Net reaction,
Zn + Cu2+ ⟶ Zn2+ + Cu(s)
6. Cell potential of Daniel cell is 1.1V
9th Standard Syllabus & Materials
9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - திருக்குறள் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - மணிமேகலை Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உள்ளத்தின் சீர் - ஏறு தழுவுதல் Important Questions And Answers Study Material - QB365 Set A
NEW9th Standard
TN 9th Tamil உயிருக்கு வேர் - தண்ணீர் Important Questions And Answers Study Material - QB365 Set A
Tamilnadu Stateboard 9th Standard Subjects
Tamilnadu Stateboard Standards
