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Q1. Molecular formula of chlorine gas is:
Q2. Which compound has the highest melting point among those listed?
Q3. All living structures are primarily:
Q4. Oxygen completes its octet by sharing:
Q5. Atomic number of chlorine is:
Q6. Which test can confirm the presence of carbon dioxide?
Q7. Atmospheric carbon is present mainly as:
Q8. Percentage of carbon dioxide in the atmosphere is about:
Q9. Bond formed by sharing of electrons is called:
Q10. Carbon compounds are poor conductors of electricity because they:
Q11. A single covalent bond consists of:
Q12. Atomic number of hydrogen is:
Q13. Atomic number of carbon is:
Q14. Percentage of carbon present in the Earth’s crust is approximately: