Chemistry questions
29404 published questions with worked solutions.
- For a reversible reaction A , the H_ forward reaction = 20 kJ mol^ -1 . The activation energy of the uncatalyzed forward reaction...
- The homoleptic and octahedral complex of Co^ 2+ and H_2O has ______ unpaired electron(s) in the t_ 2g set of orbitals.
- The number of correct statements from the following is ___________ (A) Conductivity always decreases with decrease in...
- The total change in the oxidation state of manganese involved in the reaction of KMnO_4 and potassium iodide in the acidic medium...
- 20 mL of 0.5 M NaCl is required to coagulate 200 mL of As_2S_3 solution in 2 hours. The coagulating value of NaCl is ___________.Not in JEE Main or NEET syllabus
- 30.4 kJ of heat is required to melt one mole of sodium chloride and the entropy change at the melting point is 28.4 J K^ -1 mol^...
- In which of the following reactions the hydrogen peroxide acts as a reducing agent?
- Choose the correct colour of the product for the following reaction. (benzenediazonium 4-sulfonate reacted with 1-Naphthyl amine)
- Which one amongst the following are good oxidizing agents? A. Sm^ 2+ B. Ce^ 2+ C. Ce^ 4+ D. Tb^ 4+ Choose the most appropriate...
- The metal which is extracted by oxidation and subsequent reduction from its ore isNot in JEE Main or NEET syllabus
- Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Benzene is...
- Given below are two statements, one is labelled as Assertion A : and the other is labelled as Reason R. Assertion A : Beryllium...Not in JEE Main or NEET syllabus
- What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following species: N_2 ; N_2^+ ; O ;...
- Which will undergo deprotonation most readily in basic medium (a) acetylacetone-type 1,3-diketone (b) methyl...
- Identify the correct statements about alkali metals. A. The order of standard reduction potential (M^+ | M) for alkali ions is Na...Not in JEE Main or NEET syllabus
- The hybridization and magnetic behaviour of cobalt ion in [Co(NH_3)_6]^ 3+ complex, respectively is
- Find out the major products from the following reactions. (B [NaBH_4] (i) Hg(OAc)_2,H_2O alkyne [H_2O_2/OH^-] BH_3,THF A)
- Match List-I with List-II List-I (Type): A. Antifertility drug B. Tranquilizer C. Antihistamine D. Antibiotic List-II (Name): I....Not in JEE Main or NEET syllabus
- Given below are two statements: Statement I : (5-amino-pentanal amide type) under Clemmensen reduction conditions will give...
- The number of s-electrons present in an ion with 55 protons in its unipositive state is