p-(dimethylamino)azobenzene is a yellow dye which was formerly used as a colouring agent in margarine. Write the structures of the reactants used in the preparation of this dye.

Which of the plants is used to extract the blue dye?

Answer the following question: Write the uses of natural dye.

Which is the main source of colour for preparing a natural dye ?

Identify the following: Plants used to obtain a product which is used a solidifying agent in preparation of ice-creams and jellies.

Name the compounds which are used for the preparation of benzophenone by Friedel-Crafts acylation reaction. Draw their structures.

Complete the paragraph Select the appropriate options and complete the following paragraph. (neutral, earth, live, series, _ potential difference, parallel, 220 V, 110 V) There are three types of wires used for domestic connections. The wire which is red or brown in colour through which current enters is called as______ wire. The wire which is blue or black in colour through which current retums is called as_______ wire. The wire which is yellow or green in colour and used for safety purposes is called as________ wire. Various domestic appliances are connected in________ combination so that_______ across every appliance remains the same. In India, the voltage difference between the live and neutral wires is about _______.

Use your brain power! Can you tell : The names of four fatty acids separated from vegetable oils are given in the table. Identify the number of carbon - carbon double bonds from their structure and molecular formula from the below fatty acids which one when reacts with iodine will make the colour of iodine disappear.

Read the following passage write the appropriate amount in the boxes and discuss. Govind, who is a dry land farmer from Shiralas has a 5 acre land. His family inclde his wife two children and his old mother. He borrowed one lakh twenty five thousand rupees from the bank for one year as agriculatral loan at 10 p.c.p.a . He cultivated soyabean in x acres and cotton and tur in y acres. He spent Rs. 10,000 on seeds. The expenses for fertilizers and pesticides for the soyabean crop was 2000x rupees and 4000x2 rupees were spent on wages and cultivation of land. He spent 8000 y rupees on fertilizers and pesticides and rupees 9000 y2 for wages and cultivation of land for the cotton and tur crops. Let us write the total expenditure on all the crops by using variables x and y. rupees. He harvested 5x2 quintals soyabean and sold it at Rs. 2800 per quintal. The cotton crop yield was 5/3y2 quintals which fetched Rs. 5000 per quintal. The tur crop yield was 4y quintals and was sold at Rs. 4000 per quintal. Let us write the total income in rupees that was obtained by selling the entire farm produce, with the help of an expression using variables x and y. square + square + square rupees