Chemistry questions
29404 published questions with worked solutions.
- When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative...
- E^ values of Mg^ 2+ /Mg is −2.37 V, of Zn^ 2+ /Zn is −0.76 V and Fe^ 2+ /Fe is −0.44 V. Which of the following statements is...
- Electrolyte: KCl, KNO_3 , HCl, NaOAc, NaCl ^ ( S ,cm^2 ,mol^ -1 ): 149.9, 145.0, 426.2, 91.0, 126.5 Calculate ^ _ HOAc using...
- Electrolysis of aqueous HCl solution produces _______
- Which among the following solutions is NOT used in determination of the cell constant? [MH CET 2015]
- The rusting of iron takes place as follows 2H^+ + 2e^- + 12 O_2 H_2O( l ) ; E^ = +1.23 V Fe^ 2+ + 2e^- Fe(s) ; E^ = -0.44 V...
- At temperature of 298 K, the emf of the following electrochemical cell Ag(s)|Ag^+(0.1 M)|Zn^ 2+ (0.1 M)|Zn(s) will be _______...
- Water is a non-electrolyte but conducts electricity on dissolving a small quantity of _________
- For hydrogen – oxygen fuel cell at one atm and 298 K, H_2(g) + 12 O_2(g) H_2O( l ) ; G^ = -240 kJ E^ for the cell is...
- Which one of the following has the highest molar conductivity?
- Conductivity of 0.01 M NaCl solution is 0.00147 ohm^ -1 ,cm^ -1 . What happens to this conductivity if extra 100 mL of H_2O will...
- Resistance of 0.2 M solution of an electrolyte is 50 Ω. The specific conductance of the solution is 1.3 S ,m^ -1 . If resistance...
- According to Kohlrausch's law, the limiting value of molar conductivity of an electrolyte, A_2B is
- Two different electrolytic cells filled with molten Cu(NO_3)_2 and molten Al(NO_3)_3 , respectively are connected in series. When...
- When same quantity of electricity is passed for half an hour, the amount of Cu and Cr deposited are respectively 0.375 g and 0.30...
- Which of the following electrolytic solutions has the least specific conductance?
- The value of ^ _ eq for NH_4Cl , NaOH and NaCl are respectively 149.74, 248.1 and 126.4 ^ -1 ,cm^2 ,equiv^ -1 . The value of ^ _...
- The molar conductivities of KCl, NaCl and KNO_3 are 152, 128 and 111 S ,cm^2 ,mol^ -1 , respectively. What is the molar...
- The specific conductance ( ) of an electrolyte of 0.1 N concentration is related to equivalent conductance ( ) by the following...
- Electrolysis of dilute aqueous NaCl solution was carried out by passing 10 mA current. The time required to liberate 0.01 mole of...