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.