BPSC – Combined Competitive Examination · ಪ್ರಶ್ನೆ 63
Which of the following is the first artificially prepared element?
ಉತ್ತರ ತೋರಿಸು ಮತ್ತು ವಿವರಣೆ
ಉತ್ತರ: (B) Tc (Technetium)
ವಿವರಣೆ
Technetium (Z = 43) was produced by Perrier and Segrè in 1937; its name means 'artificial'.
- (A) ತಪ್ಪು
Wrong: a naturally occurring element.
- (B) ಸರಿ
Correct: technetium (1937) was the first element made artificially.
- (C) ತಪ್ಪು
Wrong: a natural radioactive element.
- (D) ತಪ್ಪು
Wrong: a naturally occurring element.