19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Excess use of chemical fertilizers increases the quantity of…A… (air pollutant) in the atmosphere. Here, A refers to..
Which of the following green gas is damaging the ozone layer?
Which of the following greenhouse gas is released in paddy field? I. CFCs II. CH4 III. SO2
Which of the following is/are the greenhouse gases?
Atmospheric gases trap the sun’s heat near the earth’s surface and keep it warm. This is called …A… Here A refers to
In cold places flowers, vegetables and fruits are grown in glass covered areas called …A…here A refers to :
Which of the following gases cause global warming ? I. CO2 II. O3 III. CO IV. Chlorofluorocarbons (a)I, II and III
Green plants require CO2 for
Which cell converts electrical energy into chemical energy?
What is the cell reaction occurring in Daniell cell (Galvanic cell)? (a) Cu s ZnSO aq CuSO aq Zn s -> (b) Zn s CuSO aq Cu s ZnSO -> (c) Ni s ZnSO aq NiSO s Zn s -> (d) 2Na s CdSO aq Na SO aq…
Galvanic cell is a device in which
Which one of the following statements is incorrect regarding an electrochemical cell?
The electrochemical cell stops working after some time because
Which of the following has been universally accepted as a reference electrode at all temperatures and has been assigned a value of zero volts?
Standard solution of KNO3 is used to make salt bridge because
Which one of the following is not a function of a salt bridge?
If the salt bridge is removed suddenly from a working cell, the voltage
Standard electrode potential of cell is (EºAg+/Ag = 0.80V)
Which of the following expressions correctly represents the equivalent conductance at infinite dilution of Al2(SO4)3, Given that o Al and o SO are the equivalent conductance at infinite dilution of the respective …
Assertion (A) On dilution, the equivalent as well as molar conductivity of solution increases. Reason (R) With dilution, the number of current carrying particles per cm3 increases. [AIIMS 2010]
At 18º C, the conductance of H+ and CH3COO– at infinite dilution are 315 and 35 mho cn2 eq–1 respectively. The equivalent conductivity of CH3 COOH at infinite dilution is…..mho cm2 eq–1 [CBSE AIPMT 2010]
When iron is rusted, it is [MP PMT 2010]
The conductivity of 0.20 M KCl solution at 298 K is 0.0248 S cm–1. What will be molar conductivity? [Haryana PMT 2010] (a)124 S cm2 (b)124 S cm–1 (c)124 S ohm–1 cm2 equiv–1 (d)124 S cm2 mol–1
The equivalent conductance of M / 32 solution of a weak monobasic acid is 8.0 mho cm2 eq–1and at infinite dilution is 400 mho cm2 eq–1. The dissociation constant of this acid is [CBSE AIPMT 2010]
How many coulombs are required to deposit 50 g of aluminium when the electrode reaction is Al 3e Al -> [RPMT 2010]