Chemistry questions
29404 published questions with worked solutions.
- 0.4 g mixture of NaOH, Na_2CO_3 and some inert impurities was first titrated with N 10 HCl using phenolphthalein as an indicator....
- Consider the following chemical reaction. CH CH [ (ii) CO,HCl,AlCl_3] (i) Red hot Fe tube,873K Product. The number of sp^2...
- The ionization enthalpy of Na^+ formation from Na(g) is 495.8 kJ mol^ -1 , while the electron gain enthalpy of Br is –325.0 kJ...
- In the following the correct bond order sequence is:
- A biodegradable polyamide can be made from:Not in JEE Main or NEET syllabus
- Match List I with List II : List-I (Elements): (a) Li (b) Na (c) K (d) Cs List-II (Properties): (i) Poor water solubility of I^-...Not in JEE Main or NEET syllabus
- Match List I with List II : (Both having metallurgical terms) List-I: (a) Concentration of Ag ore (b) Blast furnace (c) Blister...Not in JEE Main or NEET syllabus
- The ionic radii of F^- and O^ 2- respectively are 1.33 and 1.4 Å, while the covalent radius of N is 0.74 Å. The correct statement...
- C_8H_9NO_2 [H^+] Sn+HCl 'A' [ (Yellow coloured compound) ] C_6H_5N_2^+Cl^- P Consider the above reaction, the Product "P" is :
- A reaction of benzonitrile with one equivalent CH_3MgBr followed by hydrolysis produces a yellow liquid "P". The compound "P"...
- The spin only magnetic moments (in BM) for free Ti^ 3+ , V^ 2+ and Sc^ 3+ ions respectively are (At.No. Sc : 21, Ti : 22, V : 23)
- Which one of the following is correct structure for cytosine ?
- Identify the species having one -bond and maximum number of canonical forms from the following:
- Which one of the following metals forms interstitial hydride easily ?Not in JEE Main or NEET syllabus
- Maleic anhydride can be prepared by :
- Given below are two statements : Statement I : Chlorofluoro carbons breakdown by radiation in the visible energy region and...
- Match List I with List II : List-I (Example of colloids): (a) Cheese (b) Pumice stone (c) Hair cream (d) Cloud List-II...Not in JEE Main or NEET syllabus
- What is the major product "P" of the following reaction ? 2,6-dimethylaniline [ (ii) H_2O] (i) NaNO_2,HCl,298K P (Major product)
- Identify the process in which change in the oxidation state is five :
- Number of electrons present in 4f orbital of Ho^ 3+ ion is_____. (Given Atomic No. of Ho = 67)