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Question:- The number of neutrons and protons in the nucleus of 88Ra226 are: (a) 138 and 88 (b) 88 and 138 (c) 226 and 88 (d) 88 and 226
Answer:- a
Question:- Who was the inventor of radioactivity? (a) Madam Curie (b) Irine Curie (c) Henery Bacqurel (d) Rutherford
Answer:- c
Question:- The penetrating power of which of the following invisible radiations emitting from the nucleus has its maximum value: (a) a-rays (b) f)-rays (c) y-rays (d) None of these
Answer:- c
Question:- Which of the following is negatively charged? (a) Alpha-rays (b) Beta-rays (c) Gama-rays (d) X-ray
Answer:- a
Question:- How many charges alpha-rays consist of? A. Two unit positive charges B. Unit negative charge C. Unit positive charge D. None of these
Answer:- A
Question:- Which of the following is not a radioactive element? A. Astatine B. Francium C. Titanium D. Zirconium
Answer:- D
Question:- Which of the following is the unit of radioactivity? A. Curie B. Becquerel C. Rutherford D. All of these
Answer:- B
Question:- The substance (element) obtained after emission of a beta-particle from 11Na22: A. Mg B. Mn C. Ag D. Pb
Answer:- A
Question:- The half life of a radioactive substance is 4 months then the time spent in decaying ¾th of the substance would be: A. 3 months B. 4 months C. 8 months D. 12 months
Answer:- C
Question:- The estimation of the age of the earth is done by: A. Uranium dating B. Carbon dating C. Atomic clock D. Bio clock
Answer:- A
Question:- The isotope of any atomic nucleus is in which: A. Number of neutrons be same but number of protons be different B. Number of protons be same but the number of neutrons be different C. Number of protons and neutrons both are same D. Number of protons and neutrons both are different
Answer:- B
Question:- The group displacement law is propounded by: A. Sody & Fujan B. Rutherford & Sody C. Rutherford & Fujan D. Rutherford & Madam Curie
Answer:- A
Question:- Which of the following is estimated by the radio carbon dating? A. Age of the human being B. Age of the fossils C. Disease of the human body D. Purity of the metals
Answer:- B
Question:- The number of isotopes in the hydrogen: A. 2 B. 3 C. 4 D. 5
Answer:- B