Chemistry questions
29404 published questions with worked solutions.
- The density of a monobasic strong acid (Molar mass 24.2 g/mol) is 1.21 kg/L. The volume of its solution required for the complete...
- A litre of buffer solution contains 0.1 mole of each of NH_3 and NH_4Cl. On the addition of 0.02 mole of HCl by dissolving...
- The number of paramagnetic species from the following is _______. [Ni(CN)_4]^ 2- ,[Ni(CO)_4], [NiCl_4]^ 2- , [Fe(CN)_6]^ 4- ,...
- For the first order reaction A B, the half life is 30 min. The time taken for 75% completion of the reaction is______min....
- How many of the following metal ions have similar value of spin only magnetic moment in gaseous state?_______ (Given : Atomic...
- Consider the cell Pt(s) | H_2(g) (1 atm) | H^+ (aq, [H^+] = 1)|| Fe^ 3+ (aq), Fe^ 2+ (aq) | Pt(s) Given E^0_ Fe^ 3+ /Fe^ 2+ =...
- The total number of lone pairs of electrons on oxygen atoms of ozone is_________
- A solution of CrO_5 in amyl alcohol has a ________colour.
- Correct order of spin only magnetic moment of the following complex ions is (Given At. no. of Fe : 26, Co : 27)
- According to MO theory the bond orders for O_2^ 2- , CO and NO^+ respectively, are
- Match List-I with List-II. List-I: A. van't Hoff factor, i B. k_f C. Solutions with same ostomic pressure D. Azeotropes List-II:...
- The one giving maximum number of isomeric alkenes on dehydrohalogenation reaction is (excluding rearrangement)
- Given below are two statements : Statement-I : The decrease in first ionization enthalpy from B to Al is much larger than that...
- An indicator 'X' is used for studying the effect of variation in concentration of iodide on the rate of reaction of iodide ion...
- Given below are two statements: Statement I : Nickel is being used as the catalyst for producing syn gas and edible fats....
- Match List-I with List-II. List-I: A. Osmosis B. Reverse osmosis C. Electro osmosis D. Electrophoresis List-II: I. Solvent...
- Which of the following relations are correct ? (A) U = q + p V (B) G = H – T S (C) S= q_ rev T (D) H = U – nRT Choose the most...
- Reaction of propanamide with Br_2/KOH (aq) produces :
- Following tetrapeptide can be represented as (F, L, D, Y, I, Q, P are one letter codes for amino acids)
- The set of correct statements is : (i) Manganese exhibits +7 oxidation state in its oxide. (ii) Ruthenium and Osmium exhibit +8...