Chemistry questions
29404 published questions with worked solutions.
- Thiol group is present in :
- Which of the following is an anionic detergent?Not in JEE Main or NEET syllabus
- Given C_ (graphite) + O_2(g) CO_2(g) ; _rH^ = -393.5 kJ mol^ -1 H_2(g) + 1 2 O_2(g) H_2O(l) ; _rH^ = -285.8 kJ mol^ -1 CO_2(g) +...
- 1 gram of a carbonate ( M_2CO_3 ) on treatment with excess HCl produces 0.01186 mole of CO_2 . The molar mass of M_2CO_3 in g...
- The Tyndall effect is observed only when following conditions are satisfied - (a) The diameter of the dispersed particles is much...Not in JEE Main or NEET syllabus
- A metal crystallises in the face centred cubic structure. If the edge length of its unit cell is 'a', the closest approach...Not in JEE Main or NEET syllabus
- Given E^ _ Cl_2/Cl^- = 1.36 V, E^ _ Cr^ 3+ /Cr = -0.74 V E^ _ Cr_2O_7^ 2- /Cr^ 3+ = 1.33 V, E^ _ MnO_4^-/Mn^ 2+ = 1.51 V, Among...
- The freezing point of benzene decreases by 0.45°C when 0.2 g of acetic acid is added to 20 g of benzene. If acetic acid...
- The radius of the second Bohr orbit for hydrogen atom is – (Planck's Const. h = 6.6262 10^ -34 Js; mass of electron = 9.1091 10^...
- Two reactions, R_1 and R_2 have identical pre-exponential factors. Activation energy of R_1 exceeds that of R_2 by 10 kJ mol^ -1...
- pK_a of a weak acid (HA) and pK_b of a weak base (BOH) are 3.2 and 3.4, respectively. The pH of their salt (AB) solution is-
- Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is...
- Which of the following species is not paramagnetic ?
- Which of the following reactions is an example of a redox reaction ?
- The group having isoelectronic species is
- The products obtained when chlorine gas reacts with cold and dilute aqueous NaOH are
- In the following reactions, ZnO is respectively acting as a / an (a) ZnO + Na_2O Na_2ZnO_2 (b) ZnO + CO_2 ZnCO_3
- The most abundant elements by mass in the body of a healthy human adult are : Oxygen (61.4%), Carbon (22.9 %), Hydrogen (10.0%)...
- The formation of which of the following polymers involves hydrolysis reaction?Not in JEE Main or NEET syllabus
- The increasing order of the reactivity of the following halides for the S_N1 reaction is : (I) CH_3CH(Cl)CH_2CH_3 (II)...