HARD
8th CBSE
IMPORTANT
Earn 100

Discharge doesn't take place at normal atmospheric pressure inside the cathode ray tube. Justify.

Important Questions on Atomic Structure

MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 75
The e/m ratio of cathode rays does not change by changing the gas in cathode ray discharge tube. But the e/m ratio of anode rays changes by changing the gas in the discharge tube. Justify this statement.
MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 76
When the canal ray experiment was conducted by taking helium gas in the discharge tube, e/m value of the particles was found to be less under low voltage and it was found to be more under high voltage. How do you explain this?
MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 77
Different gases can produced colours in discharge tube. Explain with reason.
MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 78
Anode rays produced by isotopes and isobars possess the same charge when taken in different discharge tubes. Which among the two sets of anode rays show different deflections in the presence of an electric field?
HARD
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 79
If  A+1xy or B+1x-1y-2 were used instead of a α-particles in Rutherford's experiment, which would be better and why?
HARD
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 80
According to Bohr's theory, the electrons revolve round the nucleus in definite paths called orbits. Do the electrons revolve round with same speed in all orbits? Justify.
MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 80
A natural sample of an element contains two isotopes A and B. The difference in their atomic mass is 2 units. If the percentage abundance of the lighter isotope A is 25% and its atomic mass is y, calculate the average atomic weight.
MEDIUM
8th CBSE
IMPORTANT
Pearson IIT Foundation Chemistry>Chapter 1 - Atomic Structure>PRACTICE QUESTIONS (COMPETITION WING)>Q 81
M-shells of two elements A and B have 18 electrons. The difference in the number of electrons present in N-shell of A and B is 8. The M-shell is the penultimate shell in B. Predict the range of probable atomic numbers of A and B.