Explain the following industrial uses of hydrogen-(a) Heat production on combustion(b) Reaction with vegetable oils in the presence of a catalyst
ImRitz
Asked:
December 2022
The physical and chemical properties of elements belonging to the same group are similar, why?
ImRitz
Asked:
December 2022
How do animals and plants, living in lakes and ponds in snowy regions, survive during win-ter?
ImRitz
Asked:
December 2022
List the various appliances working on the thermal effect produced by the electric current, which are used in our homes, and discuss their working?
ImRitz
Asked:
December 2022
A fish seems to be at a depth of 75cm from the surface. What is the actual distance from the surface? (Refractive index of water is 1.33).
ImRitz
Asked:
December 2022
Write the balanced chemical equations for formation of chlorides and oxides of the following elements - hydrogen, phosphorous, sodium and magnesium.
ImRitz
Asked:
December 2022
Acids "A" and "B" were taken in two beakers. Acid "A" ionizes partially in water while acid "B" ionizes completely. On this basis, tell:(a) Which among "A" and "B" is strong acid and which is weak?(b) What is a weak acid?(c) What is a strong acid?(d) Give examples of both...
ImRitz
Asked:
December 2022
Samaru added baking soda to raw milk so that its pH changed from 6 to 8. This milk will take longer to change into curd; why?
If the absolute refractive index of glass is 3/2 and that of water is 5/4, then find the ratio of speed of light in water and to that in glass.
ImRitz
Asked:
December 2022
What do you mean by refraction of light? How is it different from reflection of light?
ImRitz
Asked:
December 2022
Write the equation and corresponding conditions for reaction between nitrogen and hydrogen.
Write the names of any two acids found in the food that we eat.
What are the types of heat transfer? Write about them.
ImRitz
Asked:
December 2022
Explain the Ohm's law in your own words and establish the relation between V & I by drawing a graph.
A bus travels a distance of y km in 5 hours. Find the speed of the bus.
ImRitz
Asked:
December 2022
What are the factors that cause hardness of water? How many types of hardness are there?
ImRitz
Asked:
December 2022
When two objects with different temperatures are put in contact with each other, they both achieve the same temperature after some time. Why is it so?
ImRitz
Asked:
December 2022
Compare the arrangement of elements in Mendeleev's periodic table and the modern periodic table.