Practice Gk questions set 3 - general science mcq Online Quiz (set-1) For All Competitive Exams
Q-1) Valency of Cr in CrP$O_4$ is
(a)
(b)
(c)
(d)
Q-2) An oxide of nitrogen has molecular weight 30. What is the number of electrons in one molecule of the compound?
(a)
(b)
(c)
(d)
Q-3) The number of neutrons in 7Al27 is
(a)
(b)
(c)
(d)
Explanation:
Q-4) Which of the following is not a subatomic particle?
(a)
(b)
(c)
(d)
Q-5) The atomic nucleus was discovered by
(a)
(b)
(c)
(d)
Q-6) The number of electrons in an element with atomic number X and atomic mass Y will be
(a)
(b)
(c)
(d)
Explanation:
No. of electrons = no. of protons = Atomic number = X
Q-7) Radioactivity was discovered by
(a)
(b)
(c)
(d)
Q-8) Which of the following statements is /are correct? According to Dalton’s theory- An atom is the smallest particle of matter
- An atom is the smallest particle of an element
- An atom is the smallest indivisible particle of an element that can take part in a chemical change
- An atom is the radioactive emission
(a)
(b)
(c)
(d)
Q-9) The Nucleus of Helium has
(a)
(b)
(c)
(d)
Q-10) Which one of the following is not needed in a nuclear fission reactor?
(a)
(b)
(c)
(d)