Computer Science MCQs (Set–31 | Level — Beyond Classical Frontiers 😈🔥)

301. The Analytical Hierarchy extends the Arithmetical Hierarchy by allowing quantification over: A) Natural numbers only B) Strings only C) Sets of natural numbers D) Finite automata Answer: C) Sets of natural numbers 302. The problem TOT (set of Turing machines that halt on all inputs) is: A) RE-complete B) coRE-complete C) Π₂⁰-complete D) Decidable Answer: C) Π₂⁰-complete 303. The equality IP = PSPACE was proven by: A) Adi Shamir B) Richard Karp C) Stephen Cook D) John Nash Answer: A) Adi Shamir 304. The PCP Theorem was proven independently by: A) Sanjeev Arora and Shmuel Safra B) Leonid Levin and Michael Rabin C) Andrew Wiles and Terence Tao D) Leslie Valiant and Dana Scott Answer: A) Sanjeev Arora and Shmuel Safra 305. The class AWPP lies between: A) P and NP B) BQP and PP C) PSPACE and EXP D) L and NL Answer: B) BQP and PP 306. The result QIP = PSPACE was shown by: A) Rahul Jain, Zhengfeng Ji, Sarvagya Upadhyay and John Watrous B) Scott Aaronson alone C) Peter Shor D) Noam N...
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Chemistry MCQs – Set 2

🔬 Chemistry MCQs (Set–2)

11. The smallest unit of an element that retains its properties is:
A) Molecule
B) Atom
C) Ion
D) Compound
👉 Answer: B) Atom

12. Which of the following is a noble gas?
A) Oxygen
B) Nitrogen
C) Helium
D) Hydrogen
👉 Answer: C) Helium

13. The law of conservation of mass was given by:
A) Antoine Lavoisier
B) John Dalton
C) Dmitri Mendeleev
D) Henry Moseley
👉 Answer: A) Antoine Lavoisier

14. Which of the following acids is present in vinegar?
A) Citric acid
B) Acetic acid
C) Sulphuric acid
D) Nitric acid
👉 Answer: B) Acetic acid

15. The valency of oxygen is:
A) 1
B) 2
C) 3
D) 4
👉 Answer: B) 2

16. Which metal is liquid at room temperature?
A) Iron
B) Mercury
C) Copper
D) Aluminium
👉 Answer: B) Mercury

17. The chemical symbol ‘K’ stands for:
A) Krypton
B) Potassium
C) Calcium
D) Cobalt
👉 Answer: B) Potassium

18. Which gas is known as “laughing gas”?
A) Nitric oxide
B) Nitrogen dioxide
C) Nitrous oxide
D) Carbon monoxide
👉 Answer: C) Nitrous oxide

19. The process of solid changing directly into gas is called:
A) Evaporation
B) Condensation
C) Sublimation
D) Fusion
👉 Answer: C) Sublimation

20. The atomic number of carbon is:
A) 6
B) 8
C) 12
D) 14
👉 Answer: A) 6

If you want Hard Level Chemistry MCQs, Organic Chemistry MCQs, or Numerical-based MCQs, tell me 🔥

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