Chemistry questions
29404 published questions with worked solutions.
- Uracil is a base present in RNA with the following structure. % of N in uracil is ________. Given : Molar mass N = 14 g mol^ -1 ,...
- The number of correct statement/s from the following is ____________. A. Larger the activation energy, smaller is the value of...
- At 298 K, a 1 litre solution containing 10 mmol of Cr_2O_7^ 2- and 100 mmol of Cr^ 3+ shows a pH of 3.0. Given : Cr_2O_7^ 2- Cr^...
- 5 g of NaOH was dissolved in deionized water to prepare 450 mL stock solution. What volume (in mL) of this solution would be...
- For independent processes at 300 K [table: Process A: ΔH=-25,ΔS=-80; B: ΔH=-22,ΔS=40; C: ΔH=25,ΔS=-50; D: ΔH=22,ΔS=20] The number...
- When Fe_ 0.93 O is heated in presence of oxygen, it converts to Fe_2O_3. The number of correct statement/s from the following...
- If wavelength of the first line of the Paschen series of hydrogen atom is 720 nm, then the wavelength of the second line of this...
- Number of moles of AgCl formed in the following reaction is_______
- Which of the following represents the correct order of metallic character of the given elements?
- Match List-I with List-II. List-I (Amines): A. Aniline B. Ethanamine C. N-Ethylethanamine D. N, N-Diethylethanamine List-II...
- Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Carbon forms...
- Statement I : Dipole moment is a vector quantity and by convention it is depicted by a small arrow with tail on the negative...
- Which one among the following metals is the weakest reducing agent?
- A chloride salt solution acidified with dil.HNO_3 gives a curdy white precipitate, [A], on addition of AgNO_3. [A] on treatment...
- Match List-I with List-II. List-I (Isomeric pairs): A. Propanamine and N-Methylethanamine B. Hexan-2-one and Hexan-3-one C....
- Potassium dichromate acts as a strong oxidizing agent in acidic solution. During this process, the oxidation state changes from
- When the hydrogen ion concentration [H^+] changes by a factor of 1000, the value of pH of the solution __________
- The isomeric deuterated bromide with molecular formula C_4H_8DBr having two chiral carbon atoms is
- Match List-I with List-II. List-I (Coordination entity): A. [CoCl(NH_3)_5]^ 2+ B. [Co(NH_3)_6]^ 3+ C. [Co(CN)_6]^ 3- D....
- Assertion A: The alkali metals and their salts impart characteristic colour to reducing flame. Reason R: Alkali metals can be...Not in JEE Main or NEET syllabus