Q1 : Propane, C3H8, burns to produce carbon dioxide and water by the equation be

Question

Q1 : Propane, C3H8, burns to produce carbon dioxide and water by the equation below. What is the coefficient in front of the carbon dioxide in the balanced equation? C3H8 + O2 CO2 + H2O (A) 1 (B) 2 (C) 3 (D) 6

Q2 : Barium sulfate is often ingested to aid in the diagnosis of GI tract disorders. The equation for its production is Ba2+ + SO BaSO4(s). What type of equation is this? (A) a total ionic equation (B) a full equation (C) an oxidation-reduction equation (D) a net ionic equation

Q3 : The Haber Process is a method for the production of ammonia, an important chemical intermediate. The reaction for this process is: N2 + 3H2 2NH3. When the equation is correctly interpreted in terms of moles, how many moles of H2 will react with one mole of N2? (A)1 (B)2 (C)3 (D) 6

Q4 : Consider the following reaction: CaCO3 + Heat CaO + CO2 This reaction is: (A) an endothermic combination. (b) an exothermic combination. (c) an endothermic decomposition. (D) an exothermic decomposition.

Explanation / Answer

Q1) The balanced reaction is : C3H8 + 5O2 3CO2 + 4H2O

So the coefficient in front of the carbon dioxide is 3

Therefore option (C) is correct.

Q2) Ba2+ + SO42- BaSO4(s)

This is an example for a net ionic equation

Therefore option (D) is correct.

Q3) N2 + 3H2 2NH3

From the above balanced equation,

1 mole of N2 reacts with 3 moles of H2

Therefore the correct option is (C)

Q4) CaCO3 + Heat CaO + CO2

Since heat is observing so it is an endothermic reaction.

Therefore option (c) is correct

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