[" 9.Our reaction like aggressive behaviour,use of abusive words,restlessness etc.are regulated "],[" by brain,name the parts involved."]

Explain how, a reduction reaction fo aluminium can be used for welding cracked machine parts of iron. Write a chemical equation for the reaction involved.

Which of the following statements are true about the brain? (i) The main thinking part of brain is hind brain. (ii) Centres of hearing, smell, memory, sight, etc., are located in fore brain (iii) Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hind brain. (iv) Cerebellum does not control posture and balance of the body.

Which of the following statements are true about the brain? (i) The main thinking part of brain is hind brain. (ii) Centres of hearing, smell, memory, sight, etc., are located in fore brain (iii) Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hind brain. (iv) Cerebellum does not control posture and balance of the body.

In electrostatics, Electric charge is a feature of par ticles like protons, electrons etc. that decides the force of interaction among them. Br Write the name of the law that is used to measure the above force of interaction.

Drugs like LSD barbiturates, amphetamines etc are used as medicines to help patients with mental illness. However, excessive doses and abusive usage are harmful. Enumerate the major effects of these drugs in human.

(a) Name the reaction which is usually sued in the conversion of vegetable oils to fats. Explain the reaction involved in detail .Write a chemical equation to illustrate your answer (b) What is saponification? Write the chemical equation of the reaction involved in this process. Name all the substances which take part in this process and also those which are formed. (c ) Why does micelle formation take place when soap is added to water ? will a micelle be formed in other solvents like ethanol also?

(a) Esters are sweet smelling substances and are used in making perfumes. Describe an activity for the preparation of an ester with the help of a well labelled diagram. Write an equation for the chemical reaction involved in the formation of the ester . Also write the names of all the substances involved in the process of esterification. (b) State any two uses of esters.

Answer in one sentence / word. Write name of electrophile used in Kolbe's Reaction.