1.
What is the pH of a neutral solution at 25°C?
A
0
B
7
C
14
D
1
Answer and explanation
Correct Answer: B — 7
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
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
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
'Na' comes from the Latin word 'Natrium', which is the symbol for Sodium.