1.
What is the pH of a neutral solution at 25°C?
A
0
B
7
C
14
D
1
View Answer
Correct Answer: B — 7
Explanation:
A neutral solution has equal concentrations of H⁺ and OH⁻ ions. At 25°C, pH = 7 indicates neutrality.
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What is the pH of a neutral solution at 25°C?
0
7
14
1
Correct Answer: B — 7
Explanation:
A neutral solution has equal concentrations of H⁺ and OH⁻ ions. At 25°C, pH = 7 indicates neutrality.
Which organelle is known as the powerhouse of the cell?
Nucleus
Ribosome
Mitochondria
Golgi apparatus
Correct Answer: C — Mitochondria
Explanation:
Mitochondria produce ATP through cellular respiration, earning them the title 'powerhouse of the cell'.
Which element has the chemical symbol 'Na'?
Nitrogen
Sodium
Nickel
Neon
Correct Answer: B — Sodium
Explanation:
'Na' comes from the Latin word 'Natrium', which is the symbol for Sodium.