9th Class Chemistry Chapter 2 Online MCQ Test With Answers PDF English Medium (Structure of Atoms)

Chemistry 9th Class English Medium Unit 2 Online Test

Sr. #	Questions	Answers Choice
1	Carbon -14 is used for the	Growth of bones Diagonosis of goiter Age determination of old objects All of these
2	Whcih Isotopes is used for diagonosis of goiter?	Iodine-131 Cobalt -60 P-32 Sr-90
3	The percentage of ²³⁸ U ₉₂ found in nature.	97% 0.72% 98% 1.5%
4	¹³ C and ¹⁴ C are both present in nature.	0,1 % 1.1 % 0.9 % 1.5 %
5	Number of isotopes of hydrogen is	2 5 4 3
6	Which Isotopes is commonly used to irradiate cancer cells.	Cobalt -60 Iodine-23 Carbon -14 Iodine-131
7	Chlorine has two isotopes, both of which have	Same mass Number Same number of electrons Same number of neurtons Different number of protons
8	Which isotope is used in nuclear reactors.	U-234 U-235 U-238 All of these
9	Which of the following statement is not correct about isotopes.	they have same atomic number They have same number of protons They have same physical properties They have same chemical propeties
10	Mass Number is repreented by	Z S A M
11	²³⁸U₉₂ has number of neutrons.	92 146 238 330
12	Atomic number is represented by	P A At Z