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Molecular mass of methane is ………… ....

Molecular mass of methane is ………… .

A

19

B

16

C

17

D

18

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CHETANA PUBLICATION-MAS03-EXERCISE
  1. The image made by a plane mirror is a ………….image.

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  2. Molecular mass of methane is ………… .

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

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

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

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  6. Find the odd man out: Submarines, icebergs, internal organ, sunken shi...

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

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  8. State whether the following statements are true or false. Correct the ...

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  9. What is dye?

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  10. Give reasons, (any 2) Bats can navigate in the 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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