Chemistry questions
29404 published questions with worked solutions.
- Given below are two statement : Statement-I : Retardation factor (R_f) can be measured in meter/ centimeter. Statement –II R_f...
- The reaction of white phosphorus on boiling with alkali in intert atomsphere resulted in the formation of product 'A'. The...
- 0.01 moles of a weak acid HA(K_a=2.0 10^ -6 ) is dissolved in 1.0 L of 0.1 M HCl solution. The degree of dissociation of HA is ——...
- A certain orbital has n = 4 and m_ = – 3.. The number of radial nodes in this orbital is —— (Round off to the Nearest Integer)
- The mole fraction of a solute in a 100 molal aqueous solution —— 10^ -2 (Round off to the Nearest Integer) [Given : Atomic...
- For a certain first order reaction 32% of the reactant is left after 570s. The rate constant of this reaction is —— 10^ -3 s^ -1...
- The standard enthalpies of formation of Al_2O_3 and CaO are – 1675 kJ mol ^ -1 and – 635 kJ mol ^ -1 respectively. For the...
- 15 mL of aqueous solution of Fe^ 2+ in acidic medium completely reacted with 20mL of 0.03 M aqueous Cr_2O_7^ 2- solution. The...
- The oxygen dissolved in water exerts a partial pressure of 20 kPa in the vapour above water. The molar solubility of oxygen in...
- The pressure exerted by a non-reactive gaseous mixture of 6.4 g of methane and 8.8 g of carbon dioxide in a 10L vessel at 27ºC is...
- The oxidation states of nitrogen in NO, NO_2, N_2O and NO_3^- are in the order of :
- In basic medium, H_2O_2 exhibits which of the following reactions ? (A) Mn^ 2+ Mn^ 4+ (B) I_2 I^- (C) PbS PbSO_4 Choose the most...
- In the reaction of hypobromite with amide, the carbonyl carbon is lost as :
- An organic compound "A" on treatment with benzene sulphonyl chloride gives compound B. B is soluble in dil. NaOH solution....
- The first ionization energy of magnesium is smaller as compared to that of elements X and Y, but higher than that of Z. the...
- The secondary valency and the number of hydrogen bonded water molecule(s) in CuSO_4.5H_2O, respectively, are :
- Given below are two statements : Statement I : Bohr's theory accounts for the stability and line spectrum of Li^+ ion. Statement...
- The charges on the colloidal CdS sol and TiO_2 sol are, respectively :Not in JEE Main or NEET syllabus
- Match List-I with List-II : List - I (Class of Chemicals): (A) Antifertility drug (B) Antibiotic (C) Tranquilizer (D) Artificial...Not in JEE Main or NEET syllabus
- Match List-I with List-II : List-I: (A) Be (B) Mg (C) Ca (D) Ra List-II: (i) Treatment of cancer (ii) Extraction of metals (iii)...Not in JEE Main or NEET syllabus