General Science MCQ – 11 (Chemistry)

General Science mcqs

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General Science MCQs including Physics, Chemistry, Biology. This help is General Eligibility Test like Entrance Exam, Sainik School, NDA, Army, All India Competitive exam, and All HP Exams. You can also play our weekly quiz and download all quizzes PDF as well

1. According to Bohr Theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon?
(A) n = 7 to n = 5
(B) n = 6 to n = 5
(C) n = 6 to n = 4
(D) n = 7 to n = 4

2. Consider a 3dxz orbital. Which of the following statements is incorrect?
(A) The xy plane divides the electron probability distribution into two identical mirror-image halves
(B) The yz plane divides the electron probability distribution into two identical mirror-image halves
(C) The nucleus is located at a node
(D) The xz plane is a nodal surface

3. The electronic configuration of the element whose atomic number is 26 is?
(A) 1s2 2s2 2p6 3s2 3p6 4s2 3d6
(B) 1s3 2s3 2p6 3s2 3p6 4s2 3d6
(C) 1s2 2s2 2p6 3s3 3p3 4s2 3d6
(D) 1s2 2s3 2p6 3s2 3p7 4s2 3d6

4. In Bohr’s model of the hydrogen atom, the radius of an orbit?
(A) It is smallest for the lowest energy state
(B) It is smallest for the highest energy state
(C) is proportional to n2
(D) All of the above

5. Which of the following statements about periodic properties is incorrect?
(A) Atomic size increases to the right across a period
(B) Atomic size increase down a group
(C) Atomic size increase top a group
(D) Ionization energy increases to the right across a period

6. The metal used to recover copper from a solution of copper sulphate is?
(A) Ag
(B) Fe
(C) Na
(D) Hg

7. The ore which is found in abundance in India is?
(A) Monazite
(B) Magnetite
(C) Monazite
(D) None of these

8. Which of the following is used to control the inherited traits of an organism?
(A) DNA molecules
(B) RNA molecules
(C) Nucleotides
(D) All of the above

9. The heat energy produced when the human body metabolisms 1 gram of fat is?
(A) 40 KJ
(B) 39 KJ
(C) 30 KJ
(D) 29 KJ

10. What are the number of moles of CO2 which contains 16g of oxygen?
(A) 0.3 mole
(B) 0.2 mole
(C) 0.1 mole
(D) 0.5 mole

General Science MCQ – 152 (Biology)

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