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–31)

🔬 Chemistry MCQs – Set 31 (INSANE Level: Mixed Integer + Multi-Concept + Calculation Based 🔥🔥🔥🔥🔥)

301. The maximum number of electrons that can have n = 4 and ms = +½ is:

A) 8
B) 16
C) 18
D) 32
👉 Answer: B
(Total orbitals in n=4 = 16 → one electron with ms = +½ per orbital)

302. The number of σ bonds in toluene (C₆H₅CH₃) is:
A) 14
B) 15
C) 16
D) 17
👉 Answer: C

303. The value of pH for 0.1 M CH₃COOH (Ka = 1×10⁻⁵) is approximately:
A) 2
B) 3
C) 4
D) 5
👉 Answer: B

304. Which species has bond order 2.5?
A) O₂
B) NO
C) N₂
D) CO
👉 Answer: B

305. The number of geometrical isomers possible for [Co(NH₃)₄Cl₂]⁺ is:
A) 1
B) 2
C) 3
D) 4
👉 Answer: B

306. The activation energy of a reaction is 50 kJ/mol. If temperature increases from 300 K to 310 K, rate increases approximately:
A) 1.5 times
B) 2 times
C) 3 times
D) 4 times

👉 Answer: B

307. Which of the following is most stable carbocation?
A) CH₃⁺
B) C₂H₅⁺
C) (CH₃)₂CH⁺
D) (CH₃)₃C⁺

👉 Answer: D

308. The number of π-bonds in anthracene is:
A) 6
B) 7
C) 8
D) 9

👉 Answer: B

309. For a first-order reaction, if 75% reacts in 40 minutes, half-life is:
A) 10 min
B) 20 min
C) 30 min
D) 40 min

👉 Answer: B
(75% completion → 2 half-lives)

310. The geometry of SF₄ is:
A) Tetrahedral
B) Square planar
C) See-saw
D) Trigonal planar

👉 Answer: C

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