Find the type of the function f(x) = x², x € Z
Answers
Answer:
Step-by-step explanation:
1 Write the energy conversion that takes place in a hydropower plant?
A compound X on heating with excess conc Sulphuric acid at 443 K gives an unsaturated
compound Y X also reacts with sodium metal to evolve a colourless gas z identify X Y
and Z Write the equation of the chemical reaction of formation of Y and also write the role
of sulphuric acid in the reaction?
3. Name one gustatory receptors and one olfactory receptor present in human beings?
4. If the image formed by spherical mirror for all position of the object placed in front fit is always
erect and diminished. What type of mirror is it? Draw a labelled ray diagram to support your
answer?
The pH of a salt used to make tasty and crispy pakoras is 14. Identify the salt and write a
chemical equation for its formation List its two uses
6 Why is most carbon compounds poor conductor of electricity?
7. Write the name and structure of a saturated compound in which the carbon atoms are
arranged in a ring. Give the number of single bonds present in this compound?
8 Name the hormones secreted by the following endocrine glands and specify one function f
each:
a Thyroid
b. Pituitary
c Pancreas
9. State the law of refraction of Light. Explain the term 'absolute refractive index of a medium
and write an expression to relate it with the speed of light in vacuum
10. What is meant by power of a lens? Write its si unit. A student uses a lens of focal length 40
cm and another of -20cm write the nature and power of each lens?
11. Show how would you join three resistors, each of resistance 9 ohm so that the equivalent
resistance of the combination is 13.5 ohm and be ?
12. Write Joule's law of heating?
13. Two lamps one rated 100 W 220 v and other 60 W, 220 V are connected in parallel to electric
main supply. Find the current drawn by two bulbs from the line, if the supply voltage is 220v.
14 List the factors on which the resistance of a conductor in the shape of a wire depends?
15. Why are metals good conductor of electricity whereas glass is bad conductor of electricity?
16. Why are alloy commonly used in electrical heating device?
What is a dam? Why do we seek to build large dams? While building large dams, which three
main problems should particularly be addressed to maintain peace among local people?
18. Write steps involved in extraction of pure metals in the middle of the activity series from their
carbonate ores
19. How is copper extracted from its sulphide ore? Explain the various steps supported by
chemical equations. Draw labelled diagram for the electrolytic refining of copper?
20. The modern periodic table has been evolved through early attempts of Dobereiner's, Newland
and a Mendeleev. List one advantage and one limitation of all the three attempts
21. Name the scientist who first of all showed that atomic number of an element is a more
fundamental property that its atomic mass.
22. State modern periodic law?
23. Mention any two components of blood?
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