Science Chemistry MCQ-206

Science-Chemistry MCQ test for UPPSC,CivilsPrelims,NDA/NA,SSC,JKPSC,CDS Exams

The fundamental particles present in equal numbers in neutral atoms are


The absolute value of charge on electron was determined by-


Mass of electron is


Rutherford’s a-scattering experiment related to the size of the


Atomic size is of the order of


The radius of an atomic nucleus is of the order of


Positive ions are formed from neutral atoms by loss of


The nitrogen atom has 7 protons and 7 electrons. The nitride ion will have


The particle with 13 protons and 10 electrons is


Which of the following atom contains the least number of neutrons


The number of neutrons in dipositive zinc ion (Zn2+ , mass number 70 and atomic number 30) is


Which of the properties of the element is a whole number ?


Isotopes of the atoms of same element have


Nucleons are


The charge on positron is equal to the charge on


Discovery of the nucleus of an atom was due to the experiment carried out by


Na + ion is Isoelectronic with


Neutrino has


Electromagnetic radiation with maximum wavelength is


The value of Planck


Rydberg’s constant for hydrogen line is


”The position and velocity of a small particle like electron can not be simultaneously determined.” This statement is


The concept of dual nature of radiation was proposed by-


Which of the ions is not having the configuration of Ne?


The last orbit of argon has ……… electrons.