Chemistry questions
29404 published questions with worked solutions.
- Among the following the maximum covalent character is shown by the compound:
- The hybridization of orbitals of N atom in NO_3^-, NO_2^+ and NH_4^+ are respectively :
- 'a' and 'b' are van der Waals' constants for gases. Chlorine is more easily liquefied than ethane because
- The entropy change involved in the isothermal reversible expansion of 2 moles of an ideal gas from a volume of 10dm^3 to a volume...
- Boron cannot form which one of the following anions?
- Which of the following reagents may be used to distinguish between phenol and benzoic acid ?
- Identify the compound that exhibits tautomerism.
- Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of :
- The degree of dissociation (α) of a weak electrolyte, A_xB_y is related to van't Hoff factor (i) by the expression:
- Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be added to 4 kg of water to...
- The reduction potential of hydrogen half cell will be negative if :
- The rate of a chemical reaction doubles for every 10°C rise of temperature. If the temperature is raised by 50°C, the rate of the...
- Which of the following statements regarding sulphur is incorrect?
- The structure of IF_7 is :
- In context of the lanthanoids, which of the following statements is not correct ?
- Which of the following facts about the complex [Cr(NH_3)_6]Cl_3 s wrong ?
- Phenol is heated with a solution of mixture of KBr and KBrO_3. The major product obtained in the above reaction is
- Sodium ethoxide has reacted with ethanoyl chloride. The compound that is produced in the above reaction is :
- Silver Mirror test is given by which one of the following compounds ?
- The presence or absence of hydroxyl group on which carbon atom of sugar differentiates RNA and DNA ?