1.(2014年广东广州,13题)用置换反应验证铁的金属活动性比铜强,下列各组药品能达到目的的是( )
A. 154584
B. 1654168
C. 4565632952
D. 127445781
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(2014年山东菏泽,7题)仅用下列各组试剂无法完成验证Zn、Cu、Ag三种金属活动性顺序的是
A. Zn、Ag、稀硫酸、ZnSO4溶液
B. Cu、ZnSO4溶液、AgNO3溶液
C. Zn、Ag、CuSO4溶液
D. Zn、Cu、稀硫酸、AgNO3溶液
1.(2014年广东广州,13题)用置换反应验证铁的金属活动性比铜强,下列各组药品能达到目的的是( )
A. Fe、Cu、H2SO4
B. Ag、FeSO4、CuSO4
C. Fe、Cu、ZnSO4
D. Fe、Cu、KOH
Consider a PV module with the following output parameters mentioned at STC (Standard Testing Conditions) by the manufacturer.Pmax = 320 WVoc = 45 VIsc = 8 ANOCT = 40 °CTemperature coefficient of power = -1 W/°CIf the ambient temperature rises to 35 °C while the irradiance is 1000 W/m², what is the cell level temperature, as per the NOCT model, in ºC? ______
Which of the following statements is NOT true about the output of PV cells?
A. The rest of the conditions remaining the same, output power decreases with increase in temperature.
B. The rest of the conditions remaining the same, output current decreases with increase in temperature.
C. The rest of the conditions remaining the same, output voltage decreases with increase in temperature.
D. The rest of the conditions remaining the same, output current increases with increase in temperature.