Biophysical Chemistry

What type of reaction is this?

• Exothermic

• Endothermic

Which of the following statement is true?

• The base and its conjugate acid react to form a neutral solution

• The conjugate base of a weak acid is a strong base

• The conjugate base of a weak acid is a weak base

• The conjugate base of a strong acid is a strong base

The solubility of AgI in NaI solution is less than that in pure water because

• Solubility product of AgI is less than that of NaI

• The temperature of the solution decreases

• Of common ion effect

• AgI forms complex with NaI

pKa values of two acids A and B are 4 and 5. The strengths of these two acids are related as

• Acid A is 10 times stronger than acids B

• Strength of acid A : strength of acid B = 4 : 5

• Acid B is 10 times stronger than acid A

• The strengths of the two acids can not be compared

The following equation shows the reaction between calcium carbonate, CaCO₃ and hydrochloric acid, HCl:

CaCO_3(aq) + 2HCl_(aq) → CaCl_2(aq) + CO_{2 (g)­­} + H₂O_(l)

Which of the following is the suitable method to determine the rate of reaction?

• Change in the temperature of the solution with time

• Change in the volume of carbon dioxide gas with time

• Change in the mass of water with time

• Change in the concentration of hydrochloric acid with time

Which of the following equations represents the Ideal Gas Law?

• 
• 
• 
• 

What does the heat capacity of an object measure?

• the amount of energy required to change the temperature of an object

• the total amount of energy an object can store

• the thermal potential energy of the object

• the amount of work done by the object

• the amount of energy required to melt a solid object

A catalyst works by lowering the (a)   .

If the concentration of a reactant is increased, the reaction rate will (a)   .

Heat flow from a cool body to a hot body would not violate the 1st Law, energy would be still conserved.

Answer true or false based on the above stated statement.

(a)