Physics Current Affairs Quiz 2020-2021 - 2

Question: 6

The average salinity of sea water is

(A) 20%

(B) 30%

(C) 35%

(D) 40%

Question: 7

Which one of the following is used for dating archaeological specimens in words, bones and shells?

(A) Argon isotope

(B) Carbon 14

(C) Strontium 90

(D) Uranium 238

Question: 8

Chemical formula for water glass is

(A) Al₂O₃ 

(B) NaAIO₂

(C) Na₂SiO₃

(D) CasiO₃

Question: 9

The pitch of the voice of woman is in general

(A) Much lower than that of men

(B) Marginally lower than that of men

(C) Higher than that of men

(D) The same as that of men

Question: 10

Nuclear fission is caused by the impact of

(A) Neutron

(B) Electron

(C) Proton

(D) Both A and B