TN 10th [New Book 2019-2020] Chemistry Bookback Questions with Answer Key Download

Here You Download the Tamil nadu 10th STD New Book (2019-2020) Book Back Questions with Answer Key. These Bookback question and answers are very helpful for your competitive exam preparation especially for exams conducted by TNPSC, TRB, TNUSRB, TN TET, and other Tamil Nadu state level recruitment. Download book back multiple choice questions, MCQs, One marks questions from our TNPSCGURU.In website.


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Click Here To Download the TN 10th Chemistry Bookback Questions with Answer Key

Fertilizers, Pesticides, Insecticides - TNPSC Chemistry Study Materials

Some important list of insecticides, rodenticides, funficides, weedicides as follows.

Pesticides

Insecticides

1. DDT - Dichloro diphenyl tricloro ethane
2. Malathion 
3. Endosulfan (Banned)
4. Aldrin
5. Parathion
6. Metasystox

Acids, Bases and Salts


Acids
• Taste: Sour
• Testing: Changes the Blue litmus paper to Red.
• Conducts Electricity when acid solution is mixed with water.
• Ions produced in water: H3O+ or H+ ions


Common Acids and its Sources
1. Acetic Acid - Vinegar
2. Citric acid - Citrus fruits like orange, lemon, etc..,
3. Lactic Acid - Curd
4. Methanoic Acid - Ant sting, Nettle sting..
5. Oxalic acid - Tomato
6. Tartaric Acid - Tamarind


Bases
• Taste: Bitter
• Testing: Changes Red litmus paper to Blue.
• The purple colour litmus solution indicates that the solution is neither acidic nor basic.
• Conducts Electricity when basic solution is mixed with water.
• Ions produced in water: OH- ions.
• Alkali: Bases which are soluble in water.


pH Scale
• Used to find the hydrogen ion concentration in the given solution.
• pH , p - power(potenz in german).
• Minimum value - 0 and Maximum Value -14
• Value '0' represents - very acidic
• Value '14' represents - Very basic or very alkaline
• Value '7' represents - Neutral
• pH value for acid rain - less than 5.6.




Salts:
• Chlorine - Water treatment
• Bleaching powder - oxidising agent, disinfectants
• Sodium Hydrogen carbonate - Antacids, baking soda
• Sodium carbonate - Washing Soda