Spectrum is produced due to________________?

Related Mcqs:

1. Pfund series are produced in the spectrum of hydrogen atom__________________?

   A. when electrons jump down to 2nd- orbit B. when electrons jump down to 3rd- orbit C. when electrons jump down to 4th- orbit D. when electrons jump down to 5th- orbit...

2. When an atom absorbs energy the lines in the spectrum will appear which are_________________?

   A. Brighter B. Darker C. Colourless D. Hard to locate...

3. Generally the limit of visible spectrum is__________?

   A. 1000 to 300 A° B. 3800 to 7600 A° C. 8000 to 10,000 A° D. 12,000 to 15,000 A° Submitted by: Muhammad Ali Kunbhar...

4. Different components of a mixture have different Rf values due to________________?

   A. Polar solvent used B. Combination of solvents used C. Their different distribution coefficients in the solvent D. Distributive law...

5. An enzyme has its specificity due to________________?

   A. Substrate B. Structure C. Temperature D. Pressure...

6. Activated complex is formed due to________________?

   A. Pressure B. Effective collision C. Ineffective collisions D. Temperature...

7. Carbonates of lithium are not stable like that of sodium due to________________?

   A. Low electronegativity B. Low electropositivity C. Low charge density D. Not known yet...

8. Electricity in voltaic cell is produced due to_________________?

   A. neutralization B. oxidation C. reduction D. both B & C...

9. When electrons collide with heavy metals than ___________ are produced?

   A. Beta-rays B. Alpha-rays C. X-rays D. Gamma-rays...

10. Colour of fluorescene produced by cathode rays depends upon________________?

    A. Temperature B. Pressure C. Volume D. Composition of glass...