HCS · General Studies (Paper I) · General Science
Elements, compounds, acids, bases, salts and chemical change.
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Q1 · Chemistry · HARD
Which of the following elements has the highest electronegativity?
Q2 · Chemistry · EASY
Which gas is most abundant in Earth's atmosphere?
Q3 · Chemistry · MEDIUM
What is the chemical formula of common salt (table salt)?
Q4 · Chemistry · EASY
What is the pH value of pure water at 25°C?