XI Chemistry Mcqs
Energetics of Chemical Reaction – Chapter # 05 – Test 03
- Question 1 of 101. If there is no exchange of energy and matter both, between the system and surrounding, it is known as:
Right Answer! Good
Wrong Answer Correct Answer is : Isolated system
- Question 2 of 102. If the exchange of matter and energy both takes place between the system and the surroundings, it is known as:
Right Answer! Good
Wrong Answer Correct Answer is : Open system
- Question 3 of 103. Standard enthalpy changes are measure at:
Right Answer! Good
Wrong Answer Correct Answer is : 298K
- Question 4 of 104. A heterogeneous system consists of
Right Answer! Good
Wrong Answer Correct Answer is : Any number of phases
- Question 5 of 105. If only the transfer of energy with the surrounding but not matter is possible, it is known as:
Right Answer! Good
Wrong Answer Correct Answer is : Closed system
- Question 6 of 106. I Kcal is equal to:
Right Answer! Good
Wrong Answer Correct Answer is : 4.1868 KJ
- Question 7 of 107. Anything under examination in the laboratory is called:
Right Answer! Good
Wrong Answer Correct Answer is : System
- Question 8 of 108. If q is the heat added to the system, w is the work done by the system and E is the change to internal energy, than according to the first law of thermodynamics
Right Answer! Good
Wrong Answer Correct Answer is : E q w
- Question 9 of 109. In SI unit, heat of formation is expressed in:
Right Answer! Good
Wrong Answer Correct Answer is : KJ/mole
- Question 10 of 1010. The law which states that the amount of heat evolved or absorbed in a process is the same whether the reaction is completed in one or several steps is called:
Right Answer! Good
Wrong Answer Correct Answer is : Hess's Law