Chemistry Unit 1 Test

Empirical formula is the simplest atomic ratio of atoms in a molecule. Which compound does not have empirical formula CH₂O

• Acetic acid

• Glucose

• Methanol

• Methyl methanoate

At STP a gas which has maximum volume

• 2g of O₂ 

• 24g of CH₄

• 4g of He

• 4g of H₂

Combustion analysis cannot determine empirical formula of

• Glucose

• Amino acid

• Acetylene

• Ethanol

The number of carbon atoms in 45g of C₆H₁₂O₆

• 6 × N_A

• 1.50 × N_A

• 3 × N_A

• 0.25 × N_A

Volume of nitric oxide gas produced by the following reaction of 14g N₂ with excess of oxygen is

• 22.4dm³

• 11.2dm³

• 5.6dm³

• 48.8dm³

What is the mass of CaCO₃ which on heating produces 0.5 moles of CO₂ gas

• 12.5g

• 25g

• 50g

• 100g

Select the suitable term about 17g of OH–

• 1g atom

• 1g formula

• 1g ion

• 1g molecule

When 2g H₂ gas and 16g O₂ gas react completely to produce H₂O. What is non- limiting reactant

• Hydrogen

• Oxygen

• Water

• Both are consumed completely

A sample of liquid consisting of carbon, hydrogen and oxygen was subjected to combustion analysis, 24g of compound gave 22g of CO₂. What is %age of carbon

• 12.5%

• 50%

• 25%

• 99%

1gram atom of carbon is present in one mole of which of the following specie/substance

• CaCO₃

• CH₃CHO

• CH₃COOH

• CaC₂