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261. ICICI Bank on 20 April 2015 launched which payment service in collaboration with Tech Mahindra IT company, thus it enables customers to make over-the-counter payments without using cash?
262. What is the wavelength of visible spectrum?
263. In an atomic explosion, enormous energy is released which is due to
- A. conversion of chemical energy into heat energy
- B. conversion of mechanical energy into nuclear energy
- C. conversion of mass into energy
- D. conversion of neutrons into protons
- Check Answer | Discussion
264. Isotopes are separated by
265. Which of the following shows the masses of the three elementary particles in decreasing order?
- A. Leptons, Baryons, Mesons
- B. Mesons, Baryons, Leptons
- C. Baryons, Mesons, Leptons
- D. Leptons, Mesons Baryons
- Check Answer | Discussion
266. 'No two electrons in an atom can have the same set of four quantum numbers' is
267. According to Avogadro's Hypothesis, the smallest particle of an element or a compound, that can exist independently, is called ____ .
268. Atoms are composed of
269. In an atomic nucleus, neutrons and protons are held together by
270. Atoms of an element differ from those of all other elements in
- A. atomic number and electronic configuration
- B. number of neutrons and number of valence electrons
- C. atomic number and number of valence electrons
- D. number of neutrons and electronic configuration
- Check Answer | Discussion
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