Positive rays give flash on________________?

Related Mcqs:

1. Positive rays are produced__________________?

   A. By burning of gas
   B. By cooling of the gas
   C. By the bombardment of cathode rays on gas molecules
   D. From anode like cathode rays produced from cathode

2. Which one is not true about cathode rays ?

   A. 9.11×10-31 Kg
   B. Cast shadow
   C. Heat up the platinum foil
   D. Cannot ionize

3. Atom with higher atomic number produces X-rays of__________________?

   A. Shorter wavelength
   B. Larger wavelength
   C. X-ray not produced
   D. All are possible

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

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

5. Which of the following properties prove that cathode rays are material in nature_________________?

   A. they cast shadow
   B. they possess momentum
   C. they are negatively charged
   D. all of the above

6. Which of the following substances does not give iodoform test ?

   A. acetaldehyde
   B. ethyl alcohol
   C. methyl alcohol
   D. acetone

7. Which of the following will not give addition reaction with NaHSO3________________?

   A. HCHO
   B. CH3CHO
   C. CH3-CH2-CHO
   D. None of the above

8. Which one of the following methods will not give benzene ?

   A. Heating sod. Salt of Benzoic acid with soda lime
   B. Distilling phenol with Zn dust
   C. Chlorobenzene with NaOH at 360°C & 150atm.
   D. Hydrolysis of benzene sulphonic acid with super heated steam

9. Which alcohol will undergo elimination reaction to give alkene in the presence of acidic potassium dichromate ?

   A. Primary alcohol
   B. Secondary alcohol
   C. Tertiary alcohol
   D. All of above

10. Give Electronic configuration of Sodium:

    A. 1s2,2s2,2p6
    B. 1s2,2s2,2p6,3s2
    C. 1s2,2s2,2p6,3s1
    D. None of these

    Submitted by: Naintara Mustafa