Home
Class 11
CHEMISTRY
Which of the following substance give of...

Which of the following substance give off visible light when excited in an electric discharge tube?
(i) Helium (ii) Neon
(iii) Sodium (iv) Mercury

A

`(i),(ii),(iii),(iv)`

B

`(iii),(iv)`

C

`(ii),(iii)`

D

`(ii),(iii),(iv)`

Text Solution

Verified by Experts

The correct Answer is:
A
Two types of lemp used in streel lights reys on atomic emission. The mercury lamp and the sodium lamp and the sodium lamp. In both cases, light is generated by the electron bombardment of either mercury or sodium vapon. The visible portion of mercury emission falls mainly in the yellow, green, and purple regions, and sodium emission is centerted mainly in the yellow region.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • STRUCTURE OF ATOM

    R SHARMA|Exercise Follow-up Test 9|1 Videos

  • STRUCTURE OF ATOM

    R SHARMA|Exercise Follow-up Test 10|1 Videos

  • STRUCTURE OF ATOM

    R SHARMA|Exercise Follow-up Test 7|1 Videos

  • STATES OF MATTER

    R SHARMA|Exercise ARCHIVES|41 Videos

  • THE P BLOCK ELEMENTS

    R SHARMA|Exercise Archives|40 Videos

Similar Questions

Explore conceptually related problems

Which of the following is not a unit of distance? (i) Light year (ii) Parsec (iii) Leap year (iv) angstrom

What are the following substances ? Give one example of each type . (i) Antacid (ii) Nonionic detergents (iii) Antiseptics

Knowledge Check

  • Which one of the following is not formed when an electric discharge passes through helium ?

    A
    `HeH^(+)`
    B
    `HeH^(2+)`
    C
    `He_(2^(+))`
    D
    `He_(2)`

  • Which of the following substances when dissolved in water will give a solution that does not conduct electricity

    A
    Hydrogen chloride
    B
    potassium hydroxide
    C
    sodium acetate
    D
    Urea

  • Which of the following compounds gives positive Lassaigne's test for nitrogen? (i) Urea (ii) Hydrazine (iii) Phenylhydrazine (iv) Azobenzene

    A
    (i), (ii), (iii), (iv)
    B
    (i), (iii), (iv)
    C
    (i), (ii), (iii)
    D
    (ii), (iii), (iv)

    • Similar Questions

    Explore conceptually related problems

    What provides the restoriing force for simple harmonic oscillations in the following cases? (i)simple pendulum (ii) spriing (iii) column of mercury in U tube.

    Which of the following are compounds ? (i) Co (ii) NO(iii) NO(iv)CO

    Which of the following compounds will give a yellow precipitate with iodine and alkali? (i) Acetophenone (ii) Acetamide (iii) Methyl acetate (iv) 2- Hydroxypropane

    Which of the following species is/are isoelectronic with Neon ? (i) N^(3-) (ii) Mg^(2+) (iii) K^+ (iv) Ca^(2+)

    Which of the following gases can be used to make neon signs? (i) Neon (ii) Argon (iii) Krypton

    Home
    Profile