Options:
- A. Beta-rays
- B. Alpha-rays
- C. X-rays
- D. Gamma-rays
View Answer
C. X-rays
Chemistry
The number of fundamental particles in an atom of the lightest isotope carbon are_______________?
Options:
- A. 6
- B. 12
- C. 18
- D. 20
View Answer
C. 18
Atom with higher atomic number produces X-rays of__________________?
Options:
- A. Shorter wavelength
- B. Larger wavelength
- C. X-ray not produced
- D. All are possible
View Answer
A. Shorter wavelength
Increase in atomic number is observed during_________________?
Options:
- A. Alpha emission
- B. Beta emission
- C. Both A & B
- D. Radioactivity
View Answer
B. Beta emission
Space around nucleus where finding probability of electrons is maximum is called ____________________?
Options:
- A. Orbital
- B. Orbit is elliptical
- C. subshell
- D. Electron cloud
View Answer
A. Orbital
Electronic configuration of K is_________________?
Options:
- A. [Ar]4s2
- B. [Ar]4s1
- C. [Kr]5s1
- D. [He]2s1
View Answer
B. [Ar]4s1
Which one is not true about cathode rays ?
Options:
- A. 9.11
- B. Cast shadow
- C. Heat up the platinum foil
- D. Cannot ionize
View Answer
D. Cannot ionize
Rutherfords planet like structure was defective and unsatisfactory because_________________?
Options:
- A. Moving e- accelerate towards the nucleus
- B. Continuous spectrum
- C. behavior of electron remain unexplained
- D. all
View Answer
D. all
Liquid gets the shape of the container when it is poured into it. Which one of the following reasons justifies it ?
Options:
- A. Liquid do not have definite shape
- B. Liquid do not have definite volume
- C. Lieuid is highly compressible
- D. Liquid molecules can slide over each other
View Answer
D. Liquid molecules can slide over each other
Splitting of spectral lines when atom is subjected to magnetic field is called _______________?
Options:
- A. Zeemans effect
- B. Starks effect
- C. Photo electric effect
- D. Compton effect
View Answer
A. Zeemans effect