Chemistry questions
29404 published questions with worked solutions.
- In a fuel cell methanol is used as fuel and oxygen gas is used as an oxidizer. The reaction is CH_3OH( ) + 32O_2(g) CO_2(g) +...
- Given : E^ _ Fe^ 3+ /Fe = -0.036 V, E^ _ Fe^ 2+ /Fe = -0.439 V. The value of standard electrode potential for the change, Fe^ 3+...
- The half life period of a first order chemical reaction is 6.93 minutes. The time required for the completion of 99% of the...
- Which of the following statements is incorrect regarding physissorptions ?Not in JEE Main or NEET syllabus
- Which one of the following reactions of Xenon compounds is not feasible ?
- Knowing that the Chemistry of lanthanoids (Ln) is dominated by its +3 oxidation state, which of the following statements in...
- In context with the transition elements, which of the following statements is incorrect?
- Which of the following has an optical isomer ?
- Which of the following pairs represents linkage isomers ?
- The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is :
- A liquid was mixed with ethanol and a drop of concentrated H_2SO_4 was added. A compound with a fruity smell was formed. The...
- Buna-N synthetic rubber is a copolymer of :Not in JEE Main or NEET syllabus
- The two functional groups present in a typical carbohydrate are :
- Ionisation energy of He^+ is 19.6 10^ -18 Jatom^ -1 . The energy of the first stationary state (n = 1) of Li^ 2+ is
- The correct sequence which shows decreasing order of the ionic radii of the elements is
- The standard enthalpy of formation of NH_3 is −46.0 kJ mol^ -1 . If the enthalpy of formation of H_2 from its atoms is −436 kJ...
- The energy required to break one mole of Cl − Cl bonds in Cl_2 is 242 kJ mol^ -1 . The longest wavelength of light capable of...
- For a particular reversible reaction at temperature T, ΔH and ΔS were found to be both +ve. If T_e is the temperature at...
- In aqueous solution the ionization constants for carbonic acid are K_1 = 4.2 10^ -7 and K_2 = 4.8 10^ -11 . Select the correct...
- Solubility product of silver bromide is 5.0 10^ -13 . The quantity of potassium bromide (molar mass precipitation of AgBr is