(A) Radiant energy is not absorbed or emitted continuosly
(B) Radiant energy is absorbed or emitted in the form of small packets
(C) The quantum of light energy is called photon
(D) The energy associated with photon of radiation is directly proportional with the wavelength
Tag: Chemistry mcqs
Which particle has the longest wavelength if they have same speed?
(A) Electron
(B) Proton
(C) Alpha paticles
(D) Neutron
Which of the following statement is not correct regarding electromagnetic radiation?
(A) The frequency of microwave is less than UV
(B) The velocity of X-rays is more then UV
(C) The frequency of UV is grater than visible rays
(D) All radiation has same velocity
Visible light is just a proton of radiation emitted by atoms. Which of the following statement is not related to visible light?
(A) visible light is electromagnetic in nature
(B) It travels with the speed of light
(C) The wave number of light is directly proportional to its wave length
(D) The range of visible light is 400-780nm
Which of the following determines the position of an element in the periodic table?
(A) Chemical reactivity
(B) Ionization potential
(C) No. of protones in the nucleus
(D) No. of electrones in the outer orbit
Which of the following pairs of fundamental particlas are present in equal number in a nutural atom?
(A) Proton and neutron
(B) Proton and positron
(C) Electron and negatron
(D) Electron and Proton
A specific isotope has an atomic number of 18 and a mass number of 35. How many electrons are there is the natural atom?
(A) 34
(B) 18
(C) 17
(D) 35
Which of the following statement is not related to Rutherford observation about structure of an atom?
(A) An atom consist of central core or nucleus around which electrons exist
(B) The nucleus has most of the atom
(C) The nucleus consist of protons and neutrons
(D) Each distinct atom has a specific number of protons