Name the non-metal which is used:
(a). To convert vegetable oil into vegetable ghee (solid fat)
(b). As a rocket fuel (in liquid form).
(c). To make electrodes of dry cells
(d). To preserve food materials.
(e). In the vulcanisation of rubber.

Element A is d-block as well as transition element of 3d series it is used to convert vegetable oil into vegetable ghee, (X) is poisonous gas which is used for the extraction of element A. Which option is incorrect?

(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?

Name the following : (a) A metal which is preserved in kerosene (b) A lustrous coloured non-metal (c ) A metal which can melt while kept on palm (d) A metal which is poor conductor of heat.

Name: (a) Three different forms of carbon. (b) A form of carbon used as a gem. (c) Two substances used to make electric wires. (d) Two substances used to make jewellery. (e) A substance used as an insulator.

In the reactor of a nuclear power plant, name the material which is used : (a) as a moderator (b) to absorb radiations (c ) in the fuel rods (d) in the control rods (e) to carry away heat

(a). Define non-metals. Give five examples of non-metals. (b). Name a non-metal which conducts electricity. (c). Name a non-metal haivng lustre (shining surface). (d). Name a non-metal which is extremely hard. (e). How do non-metlas react with oxygen? Explain with an example. Give equation of the reaction involved. What is the nature of the product formed ? How will you demonstrate it?

Identify the following. (a) The gaseous compound of two non-metals required for photosynthesis. (b) The compound of two non-metals which exists in all the three states under normal conditions. (c) The metal which breaks into pieces on the application of force. (d) The metal used in thermometers. (e) The inert gas used in advertisement sign boards.

Raghav is a student of class X who was trying to convert the groundnut oil into solid fat (vanaspati ghee). He took the oil inan appropriate flask having an arrangement for passing hydrogen gas into it. Raghav pased the hydrogen gas into oil and heated them together for a considerable time. On cooling the apparatus, Raghav found that even after heating them together for a considerable time. On cooling the apparatus, Raghav found that even after heating together oil and hydrogen for a considerable time, no solid fat was formed. Raghav shard this problem with his sister Divya who is studyging in class XI. She advised him ot add a certain finely divided substance while heating oil wih hydrogen gas. When Raghav repeated the experiment by adding this substance to oil and hydrogen mixture, then the liquid oil was converted into a solid fat.Divya advised Raghav not to consume the fat prepared by him in the laboratory. (a) What was he finely divided substance which Raghav was asked to add for converting oil into fat? What is its function? (b) What type of substance is (i) an oil, and (ii) a fat? (c) What is the special name of conversion of oils into fats used in Industry? (d) What are the two types of chemical reactions exemplified by the conversion of oils into fats? (e) Why did Divya ask Raghav not to consume the fat prepared by him in the laboratory? (f) What values are exhibited by Divya in this episode?