Science Quiz [ Mr, Shokir ]
![Science Quiz [ Mr, Shokir ] - Quiz](/quiz-school/images/description/Miscellaneous/3.jpg "Science Quiz [ Mr, Shokir ] - Quiz")
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- 1.
Calculate : - 2.Calculate the heat quantity in - kJ - required to raise the temperature of 48.7 g of water from 22.8 C to 62 C
- 3.Calculate the heat quantity in - kJ - required to raise the temperature of 48.7 g of water from 22.8 C to 62 C
- 4.Which one of the following substances has the higher specific heat ? ...........
- A.
1 g of water
- B.
1 g of iron
- C.
1 g of Alumnium
- D.
1 g of mercury
- 5.If the temperature of a substance is doubled , its specific heat will be ..............
- A.
Decreased to half
- B.
Constant
- C.
Increased to double
- D.
Increased to four times
- 6.If the two bodies have the same mass , gain the same amount of heat , the raise in the temperature of the second body is double that of the first , therefore the specific heat of the second body is ............ the first one.
- A.
Equal to
- B.
Double
- C.
Half
- D.
Quarter
- 7.The following is a list of specific heat capacities for a few metals : C copper = 0.385 , C iron = 0.444 , C silver = 0.240 , C aluminum = 0.900 50 g of sample on an unknown metal is heated with 800 joules , if the temperature of the metal increases by 41.6 C , What is the identity of the unknown metal ? ................
- A.
Copper
- B.
Silver
- C.
Alumnium
- D.
Iron
- 8.Using the quantity of heat equation , what would the formula look like if we were calculating the change in temperature ? ........
- A.
Qp.m=Δ T.c
- B.
Qp/m.c=Δ T
- C.
Qp.m/c=Δ T
- D.
Qp.c.m=Δ T
- 9.The (+ ve) sign which precedes the Δ H value , indicates that the enthalpy of products is ............ that of reactants
- A.
Larger than
- B.
Equal
- C.
Lower than
- D.
Constant
- 10.If the heat content of products is lower than that of reactants , thus the reaction ...........
- A.
Is endothermic
- B.
Is exothermic
- C.
Whose Δ H value has a positive sign
- D.
Whose Δ H value = zero
- 11.Dissolving process is called hydration when the solvent is ..........
- A.
Benzene
- B.
Oil
- C.
Alcohol
- D.
Water
- 12.
In the following thermochemical equation : The heat change accompanied with this process is called ............... heat
- A.
Formation
- B.
Combustion
- C.
Dissolving
- D.
Neutralization
- 13.What is the change in Enthalpy on dissolving 40 g of NaOH in water to form one liter of solution , knowing that the temperature raised by 10.6 C ? .............kJ/mol [ NaOH = 40 g/mol ]
- A.
-0.443
- B.
-4.4308
- C.
-44.308
- D.
-443
- 14.Which of the following remains constant in the closed system ? .......
- A.
Energy
- B.
Mass
- C.
Temperature
- D.
Enthalpy
- 15.
In the reaction :
- A.
Negative , because the reaction is endothermic
- B.
Positive , because the reaction is endothermic
- C.
Negative , because the reaction is exothermic
- D.
Positive m because the reaction is exothermic
- 16.
Anhydrous copper II chloride reacts with water to form hydrous copper II chloride , according to the equation :
- A.
-1586 kJ/mol
- B.
316 kJ/mol
- C.
-110 kJ/mol
- D.
-30 kJ/ mol
Questions: 10 | Attempts: 98199 | Last updated: Jun 27, 2022
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