General Science MCQ – 119 (Chemistry)

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1. Find the amphoteric oxide?
(A) CaO₂
(B) CO₂
(C) SnO₂
(D) SiO₂

2. Graphite has a structural similarity with?
(A) B₂H₆
(B) B₄C
(C) B
(D) BN

3. Which is the correct order of decreasing acidity of Lewis acids?
(A) BBr₃ > BCl₃ > BF₃
(B) BF₃ > BCl₃ > BBr₃
(C) BCl₃ > BF₃ > BBr₃
(D) BBr₃ > BF₃ > BCl₃

4. In the presence of KF, AlF3 is soluble in HF. Find the complex formed?
(A) K₃[AlF₆]
(B) AlH₃
(C) K[AlF₃H]
(D) K₃[AlF₃H₃]

5. S-S bond is present in which of the ion pairs?
(A) S₂O₇^2-, S₂O₃^2-
(B) S₄O₆^2-, S₂O₇^2-
(C) S₂O₇^2-, S₂O₈^2-
(D) S₄O₆^2-, S₂O₃^2-

6. Which is the correct order of decreasing bond dissociation enthalpy?
(A) F₂ > Cl₂ > Br₂ > l₂
(B) l₂  > Br₂ > Cl₂ > F₂
(C) Cl₂ > Br₂ > F₂ > l₂
(D) Br₂ > l₂ > F₂ > Cl₂

7. Oxygen is not released on heating which of the compounds?
(A) (NH₄)₂Cr₂O₇
(B) K₂Cr₂O₇
(C) Zn(ClO₃)₂
(D) KClO₃

8 Which of the species has a permanent dipole moment?
(A) SF₄
(B) SiF₄
(C) BF₃
(D) XeF₄

9. Which of the statement is incorrect for XeO4?
(A) Four p𝜋-d𝜋 bonds are present
(B) Four sp3 – p 𝜎 bonds are present
(C) It has a tetrahedral shape
(D) It has a square shape

10. P₄O₁₀ has______ bridging O atoms?
(A) 4
(B) 5
(C) 6
(D) 2

General Science MCQ – 118 (Biology)