General Science MCQ – 67 (Chemistry)

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1. Which of the compounds is known as Slaked lime?
(A) CaO
(B) CaSO₄
(C) Ca(OH)₂
(D) CaCO₃

2. Which of the ions have maximum hydration energy?
(A) Sr²⁺
(B) Ca²⁺
(C) Mg²⁺
(D) Be²⁺

3. As compared to K, Na has?
(A) Higher ionization potential
(B) Lower melting point
(C) Lower electronegativity
(D) Larger atomic radius

4. Which one is the most stable carbonate?
(A) BaCO₃
(B) MgCO₃
(C) CaCO₃
(D) BeCO₃

5. Plaster of Paris (POP) is?
(A) CaSO₄ H₂O
(B) CaSO₄ H₂O
(C) CaSO₄
(D) CaSO₄ 1/2H₂O

6. Which oxide is amphoteric?
(A) BaO
(B) CaO
(C) BeO
(D) MgO

7. Be shows the diagonal relationship with?
(A) Na
(B) Al
(C) Mg
(D) B

8. The tendency to lose their valance electron easily by alkali metals them?
(A) Strong reducing agent
(B) Weak reducing agent
(C) Strong oxidizing agent
(D) Weak oxidizing agent

9. Which on is known as fusion mixture?
(A) Na₂CO₃ + NaHCO₃
(B) Na₂CO₃ + NaOH
(C) Na₂CO₃ + K2O4
(D) Na₂CO₃ + K₂CO₃

10. Find the incorrect trend for alkaline earth metals?
(A) Atomic size Be < Mg < Ca < Sr
(B) Second ionization energy Be < Mg < Ca < Sr
(C) Hydration enthalpy Sr < Ca < Mg < Be
(D) Density Ca < Mg < Be < Sr

General Science MCQ – 66 (Biology)