Question

Choose the correct option from the following options:- (5)

I. Rutherford alpha particles scattering experiment discovered,

a. Electron

b. Proton

c. Atomic nucleus.

d. Neutron.

II. Number of valance electrons in O2- ion is,

a. 6

b. 8

c. 10

d. 4

III. The mass no. Of an atom whose unipositive ion has 10 electrons and 12 neutrons is,

a. 23

b. 22

c. 20

d. 21

IV. Soap is chemically a sodium salt of,

a. Palmic acid.

b. Stearic acid.

c. Acetic acid.

d. Polyvinyl sulfurous acid.

V. Chemical formula CaSO4. 2H2O represents,

a. Calamite

b. Dolomite

c. Bauxite

d. Gypsum.​

Answer 1

Answer:

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Answer 2

Answer:

1)a

2)c

3)b

4)d

5)b

hope it helps