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 4

 Here are Chemistry MCQs – Set 4 (Moderate Level):

🔬 Chemistry MCQs (Set–4)

31. The shape of a methane (CH₄) molecule is:
A) Linear
B) Trigonal planar
C) Tetrahedral
D) Square planar
👉 Answer: C) Tetrahedral

32. The electron was discovered by:
A) Ernest Rutherford
B) James Chadwick
C) J.J. Thomson
D) Niels Bohr
👉 Answer: C) J.J. Thomson

33. Which of the following is an example of a homogeneous mixture?
A) Sand and water
B) Oil and water
C) Air
D) Soil
👉 Answer: C) Air

34. The process of coating iron with zinc to prevent rusting is called:
A) Alloying
B) Galvanization
C) Electroplating
D) Smelting
👉 Answer: B) Galvanization

35. Which of the following is a non-metal?
A) Sodium
B) Magnesium
C) Sulphur
D) Calcium
👉 Answer: C) Sulphur

36. The molecular formula of glucose is:
A) C₆H₆
B) C₆H₁₂O₆
C) C₂H₅OH
D) CH₄
👉 Answer: B) C₆H₁₂O₆

37. Which particle has no charge?
A) Proton
B) Electron
C) Neutron
D) Ion
👉 Answer: C) Neutron

38. The gas evolved when zinc reacts with dilute HCl is:
A) Oxygen
B) Nitrogen
C) Hydrogen
D) Chlorine
👉 Answer: C) Hydrogen

39. The atomic mass of an element is mainly due to:
A) Electrons
B) Protons only
C) Neutrons only
D) Protons and Neutrons
👉 Answer: D) Protons and Neutrons

40. Which of the following is a base?
A) HCl
B) NaOH
C) H₂SO₄
D) HNO₃
👉 Answer: B) NaOH

If you want Hard Level MCQs (Numerical + Concept Based), tell me 🔥

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