Chemistry questions
29404 published questions with worked solutions.
- Number of atoms in 558.5 gram Fe (at.wt. of Fe = 55.85 g mol^ -1 ) is
- In a hydrogen atom, if energy of an electron in ground state is 13.6 eV, then that in the 2nd excited state is
- In which of the following species the interatomic bond angle is 109^ 28'?
- For an ideal gas, number of moles per litre in terms of its pressure P, gas contant R and temperature T is
- If an endothermic reaction is non- spontaneous at freezing point of water and becomes feasible at its boiling point, then
- Change in volume of the system does not alter the number of moles in which of the following equilibria ?
- In which of the following reactions, increase in the volume at constant temperature does not affect the number of moles at...
- For the reaction CO(g) + (1/2)O_2(g) = CO_2(g), K_p/K_c is
- 1 M NaCl and 1 M HCl are present in an aqueous solution. The solution is
- Let the solubility of an aqueous solution of Mg(OH)_2 be x then its k_ sp is
- The solubility of Mg(OH)_2 is S moles/litre. The solubility product under the same condition is
- How do we differentiate between Fe^ 3+ and Cr^ 3+ in group III?
- For the reactions, C + O_2 CO_2; H = -393 J 2Zn + O_2 2ZnO; H = -412 J
- Which of the following is a redox reaction ?
- KO_2 (potassium super oxide) is used in oxygen cylinders in space and submarines because it
- A metal M readily forms its sulphate MSO_4 which is water - soluble. It forms its oxide MO which becomes inert on heating. It...Not in JEE Main or NEET syllabus
- Alum helps in purifying water byNot in JEE Main or NEET syllabus
- Arrangement of (CH_3)_3-C-, (CH_3)_2-CH-, CH_3-CH_2- when attached to benzyl or an unsaturated group in increasing order of...
- A similarity between optical and geometrical isomerism is that
- Which of the following does not show geometrical isomerism?