Computer Science MCQs (Set–29 | Level — Frontier Open Conjectures & Deep Structural Theory 😈🔥)

281. The statement “P ≠ NP” would immediately imply: A) NP ⊄ P B) No NP-Complete problem is solvable in polynomial time C) There exist problems verifiable but not efficiently solvable D) All of the above Answer: D) All of the above 282. The class coNP consists of languages whose complements are in: A) P B) NP C) PSPACE D) EXP Answer: B) NP 283. If PH collapses to level k, then: A) All higher levels equal Σₖ^P B) PSPACE collapses C) NP = PSPACE D) EXP collapses Answer: A) All higher levels equal Σₖ^P 284. The problem of graph isomorphism is currently known to be in: A) P (proven decades ago) B) NP-Complete C) Quasi-polynomial time D) PSPACE-Complete Answer: C) Quasi-polynomial time 285. The class #P deals with: A) Optimization problems B) Counting accepting paths C) Space-bounded computation D) Quantum proofs Answer: B) Counting accepting paths 286. If #P = FP (polynomial-time computable functions), then: A) P = NP B) PH collapses C) PSPACE = NP D) BQP = P Answer: B) PH collapses ...
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Chemistry MCQs (Set–40)

 Here are 🔬 Chemistry MCQs – Set 40 (Beyond Ultimate Level Chemistry Marathon 🔥🔥🔥🔥🔥)

391. The maximum number of electrons that can have n = 7 is:

A) 49
B) 98
C) 32
D) 72
👉 Answer: B
(Maximum electrons = 2n² = 2 × 7² = 98)

392. Which of the following has highest electronegativity?
A) O
B) F
C) Cl
D) N
👉 Answer: B

393. The number of σ-bonds in benzene is:
A) 6
B) 9
C) 12
D) 15
👉 Answer: C

394. The pH of 1×10⁻⁹ M HCl solution is approximately:
A) 9
B) 8
C) 7
D) Slightly less than 7
👉 Answer: D
(Water contribution dominates; pH slightly < 7)

395. Which radical is most stable?
A) Vinyl
B) Methyl
C) Benzyl
D) Primary

👉 Answer: C

396. The bond order of N₂⁺ is:
A) 3
B) 2.5
C) 2
D) 1.5

👉 Answer: B

397. The number of unpaired electrons in Co³⁺ (high spin, d⁶) is:
A) 4
B) 3
C) 2
D) 1

👉 Answer: A

398. For a second-order reaction, if concentration is halved, rate becomes:
A) Half
B) One-fourth
C) Double
D) Same

👉 Answer: B

399. Which compound gives positive Tollens’ test?
A) Propanal
B) Acetone
C) Acetamide
D) Benzophenone

👉 Answer: A

400. The geometry of XeF₆ is:
A) Octahedral
B) Distorted octahedral
C) Square pyramidal
D) Trigonal bipyramidal

👉 Answer: B

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