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The ……….% aqueous solution of salt is ca...

The ……….% aqueous solution of salt is called brine.

A

25

B

60

C

30

D

50

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CHETANA PUBLICATION-MAS03-EXERCISE
  1. Molecular mass of methane is………….. .

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  2. Sound waves with frequency greater than 20 kHz are called……….. .

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  3. The ……….% aqueous solution of salt is called brine.

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  4. If the reflected rays do not actually meet, such an image is called as...

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  5. Find the odd one out: Submarines, icebergs, internal organ, sunken s...

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  6. Complete the analogy: Propene : double bond : : Propyne : …………. .

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  7. State True or False. Correct the false statement: A convex mirror is ...

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  8. What is dye?

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  9. Match the columns:

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  10. Bats can navigate in dark.

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  11. Give reasons, (any 2) Methane is used as a domestics fuel.

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  12. Give scientific reasons: Bleaching powder has the odour of chlorine.

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  13. Give the uses of Coal.

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  14. If you hear the thunder 20 seconds after you see the flash of lightnin...

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  15. An object 10 cm in height is placed at a distance of 36 cm from a conc...

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  16. The speed of sound in air at 0^@C is 332 m//s. If it increases at the ...

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  17. Give structural formula and electron dot model of methane.

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  18. What is an echo? What factors are important to get a distinct echo?

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  19. Write a short note on biogas plant. (3) Give the properties and uses o...

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  20. Explain the sign conventions for reflection by spherical mirrors

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