Can you describe what happens when milk is converted into curd or yoghurt from your understanding of proteins?

Can you suggest a method to remove oil (hydrocarbon) from seeds based on your understanding of rDNA technology and chemistry of oil ?

Take 2kg of ice is at - 5^@ C. Supply heat is continuously to ice. Till it starts boiling. Note the temperature every minute. Draw a graph between temperature and time using the values you get. What do you understand from the graph. Write the conclusions. ( You know that ice melts at 0^@ c and boils at l00^@C

Calculate potential energy of a point charge - q placed along the axis due to a charge + Q uniformly distributed along a ring of radius-, R. Sketch P .F. as a function or axial distance z from the centre of the ring. Looking at graph, can you see what would happen if - q is displaced slightly from the centre of the ring (along the axis) ?

The electricity bill of Atulbhai's house is more. So Sachin advised him to go for Government's subsidy scheme and put solar panels in his house. By doing so Atulbhai's electricity bill reduces. (1) In the solar panel the solar energy is converted into what form of energy ? (2) How many watts of electricity is produced from a typical solar cell when exposed to the sum ? (3) State the limitations of solar energy.

Assertion : Microorganisms such as lactobacillus and others commonly called lactic acid bacteria (LAB) grow in milk and convert it to curd. Reason : During growth, these bacteria produce acids that coagulate and partially digest the milk proteins (A) If both assertion and reason are true and reason is the correct explanation of assertion. (B) If both assertion and reason are true but reason is not the correct explanation of assertion. (C) If assertion is true but reason is false. (D) If both assertion and reason are false.

Can you compress it? Is it a solid? Why? Think. Is anything coming out from the sponge when it is compressed.

Answer the following questions based on the P-T phase diagram of CO_(2) : What happens when CO_(2) at 4 atm pressure is cooled from room temperature at constant pressure ?

(a) When a molecule (or an elastic ball) hits a ( massive) wall, it rebounds with the same speed. When a ball hits a massive bat held firmly, the same thing happens. However, when the bat is moving towards the ball, the ball rebounds with a different speed. Does the ball move faster or slower? (b) When gas in a cylinder is compressed by pushing in a piston, its temperature rises. Guess at an explanation of this in terms of kinetic theory using (a) above. (c) What happens when a compressed gas pushes a piston out and expands. What would you observe ? (d) Sachin Tendulkar used a heavy cricket bat while playing. Did it help him in anyway ?

Answer the following questions based on the P - T phase diagram of CO_(2) : (a) CO_(2) at 1 atm pressure and temperature -60^(@)C is compressed isothermally. Does it go through a liquid phase ? (b) What happens when CO_(2) at 4 atm pressure is cooled from room temperature at constant pressure ? (c) Describe qualitatively the changes in a given mass of solid CO_(2) at 10 atm pressure and temperature -65^(@)C as it is heated up to room temperature at constant pressure. (d) CO_(2) is heated to a temperature 70^(@)C and compressed isothermally. What changes in its properties do you expect to observe ?