General Science MCQ – 39 (Chemistry)

chemistry, physics, biology

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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. Which one will have the highest 2nd ionization energy?
(A) 1s2 2s2 2p6 3s1
(B) 1s2 2s2 2p4
(C) 1s2 2s2 2p6
(D) 1s2 2s2 2p6 3s2

2. Which one is the strongest acid?
(A) MgO
(B) Cao
(C) Al2O3
(D) Na2O

3. Two different beakers contain m1-O-H, and M2-O-H solutions separately. Find the nature of the two solutions if the electronegativity of M1 = 3.4, M2 = 1.2, O = 3.5, H = 2.1?
(A) acidic, acidic
(B) basic, acidic
(C) basic, basic
(D) acidic, basic

4. The correct order of electronegativity is?
(A) Cl > F > O > Br
(B) F > O > Cl > Br
(C) F > Cl > Br > O
(D) O > F > Cl > Br

5. Which of the following statements is incorrect?
(A) I.E.1 of O lower than that of N but I.E.2 O is higher than that of N
(B) The enthalpy of N to gain an electron is almost zero but of P is 74.3 kj mol-1
(C) Isoelectronic ions belong to the same period
(D) The covalent radius of iodine is less its Van der Waal’s radius

6. Which of the reactions will need the maximum amount of energy?
(A) Na -> Na + + e-
(B) Ca -> Ca++ + e-
(C) K+ ->K+ ++ e-
(D) C2+ -> C3+ + e-

7. For the same value of n, the penetration power of orbital follows the order?
(A) s = p = d = f
(B) p > s > > d > f
(C) f < d < p < s
(D) s < p < d < f

8. The correct order for the size of I, I+, I- is?
(A) I > I- > I+
(B) I > I+ > I-
(C) I- > I > I+
(D) I+ > I- > I

9. In the modern periodic table, the number of periods of the element is the same as?
(A) Principal quantum number
(B) Atomic number
(C) Azimuthal quantum number
(D) Atomic mass

10. Find the successive element of the periodic table with ionization energies, 2372, 520 and 890 kj per mol respectively?
(A) Li, Be, B
(B) H, He, Li
(C) B, C, N
(D) He, Li, Be

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