9th Class Chemistry Chapter Wise Online MCQ Test With Answers PDF English Medium

9th Class Chemistry English Medium Online Test For Full Book

Sr. #	Questions	Answers Choice
1	Which element is capable of forming all the three types of bonds, covalent coordinate covalent or ionic.	Carbon Silicon Magnesium Oxygen
2	When molten copper and olten zinc are mixed together , they give rise to a new substnce called brass. Predict what type of bond is formed between copper and zinc.	Ionic bond Coordinate Covalent bond Metallic bond Covalent Bond
3	Carbon -14 is used for the	Growth of bones Diagonosis of goiter Age determination of old objects All of these
4	Whcih Isotopes is used for diagonosis of goiter?	Iodine-131 Cobalt -60 P-32 Sr-90
5	The percentage of ²³⁸ U ₉₂ found in nature.	97% 0.72% 98% 1.5%
6	¹³ C and ¹⁴ C are both present in nature.	0,1 % 1.1 % 0.9 % 1.5 %
7	Number of isotopes of hydrogen is	2 5 4 3
8	Which Isotopes is commonly used to irradiate cancer cells.	Cobalt -60 Iodine-23 Carbon -14 Iodine-131
9	Chlorine has two isotopes, both of which have	Same mass Number Same number of electrons Same number of neurtons Different number of protons
10	Which isotope is used in nuclear reactors.	U-234 U-235 U-238 All of these
11	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
12	Mass Number is repreented by	Z S A M