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	The nucleus of an atom is composed of	Electrons Electons and protons Protons and neutrons Electrons and neutrons
2	Proton are feflected toward plate.	Positive Negative Both a and b None of these
3	Quantum means.	Virable energy Fixed energy High energy Minimum energy
4	According to Rutherford's atomic theory, atom should produce.	Line spectrum Continuous spectrum Both a and b None of these
5	Who performed fist experiment to split atom	Bohr Newton Rutherford Soddy
6	Rutherford used a gold foil in his experiment, which had a tickness of	0,0002 cm 0,0001 cm 0.001 cm 0.00004cm
7	John Dalton put forward his atomic theory.	1800 1803 1805 1903
8	A sub sheel that cna accommodate 6 electrons is	b s f p
9	M shell has sub sheels.	1s , 2s 1s,2s,3s 2s,2p 3s,3p,3d
10	How doe electrons keep themselves away from the oppositely charged nucleus.	A agnetic field around the nucleus keeps them away By keeping themselves stationary By revolving around the nucleus Due to their wave like nature
11	What does keep the particles present in the nucleus intact.	Particles are held together by dipolar force Particles are held together by wee nuclear force Particles are held together by strong nuclear force Particles are held together by electrostatic force
12	How is radio carbon dating useful for archeolgists.	It helps detemine whether the matter is radioactie or not It helps determine the age of organic matter It helps determine the composition of matter It helps deterime the usefulness of matter

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