Chemistry questions
29404 published questions with worked solutions.
- Which of the following is not a correct statement for primary aliphatic amines?
- The gas 'A' is having very low reactivity reaches to stratosphere. It is non–toxic and non–flammable but dissociated by UV–...
- Assertion (A): Synthesis of ethyl phenyl ether may be achieved by Williamson synthesis. Reason (R): Reaction of bromobenzene with...
- In polythionic acid, H_2S_xO_6(x = 3 to 5) the oxidation state(s) of sulphur is/are :
- Tyndall effect is more effectively shown by :Not in JEE Main or NEET syllabus
- The reaction that occurs in a breath analyser, a device used to determine the alcohol level in a person's blood stream is...
- The kinetic energy of an electron in the second Bohr orbit of a hydrogen atom is equal to h^2 xma_0^2 . The value of 10x...
- 1 kg of 0.75 molal aqueous solution of sucrose can be cooled up to –4°C before freezing. The amount of ice (in g) that will be...
- 1 mol of an octahedral metal complex with formula MCl_3.2L on reaction with excess of AgNO_3 gives 1 mol of AgCl. The denticity...
- The number of f electrons in the ground state electronic configuration of Np (Z = 93) is_________. (Nearest integer)
- 200 mL of 0.2 M HCl is mixed with 300 mL of 0.1 M NaOH. The molar heat of neutralization of this reaction is –57.1 kJ. The...
- The number of moles of NH_3, that must be added to 2L of 0.80 M AgNO_3 in order to reduce the concentration of Ag^+ ions to 5.0...
- When 10 mL of an aqueous solution of KMnO_4 was titrated in acidic medium, equal volume of 0.1 M of an aqueous solution of...
- The addition of dilute NaOH to Cr^ 3+ salt solution will give :
- Statement I : Ethyl pent–4–yn–oate on reaction with CH_3MgBr gives a 3°-alcohol. Statement II : In this reaction one mole of...
- In stratosphere most of the ozone formation is assisted by :
- The compound/s which will show significant intermolecular H–bonding is/are: (a) 4-nitro-2-hydroxybenzyl-diisopropylamine type (b)...
- Which one of the following reactions will not yield propionic acid?
- The correct order of ionic radii for the ions P^ 3- , S^ 2- , Ca^ 2+ , K^+, Cl^ -1 is :
- Which one of the following is the major product of the given reaction? (dicyano-dimethyl-cyclohexenone) [ (ii) H_3O^+ (iii)...