Chemistry questions
29404 published questions with worked solutions.
- Match List - I with List - II : List - I: (a) NaOH (b) Be(OH)_2 (c) Ca(OH)_2 (d) B(OH)_3 (e) Al(OH)_3 List - II: (i) Acidic (ii)...
- Given four carbocations A (benzylic CH2+), B (CH2=CH-CH2+ allylic), C (CH3-CH+ secondary), D (HC≡C+ sp vinyl cation). The correct...
- Assertion A : Lithium halides are some what covalent in nature. Reason R : Lithium possess high polarisation capability. In the...
- The density of NaOH solution is 1.2 g cm^ -3 . The molality of this solution is ______m. (Round off to the Nearest Integer) [Use...
- CO_2 gas adsorbs on charcoal following Freundlich adsorption isotherm. For a given amount of charcoal, the mass of CO_2 is...Not in JEE Main or NEET syllabus
- The conductivity of a weak acid HA of concentration 0.001 mol L^ -1 is 2.0 10^ -5 S cm^ -1 . If ^ _m(HA) = 190 S cm^2 mol^ -1 ,...
- 1.46 g of a biopolymer dissolved in a 100 mL water at 300 K exerted an osmotic pressure of 2.42 10^ -3 bar. The molar mass of the...
- An organic compound is subjected to chlorination to get compound A using 5.0 g of chlorine. When 0.5 g of compound A is reacted...
- The number of geometrical isomers possible in triamminetrinitrocobalt (III) is X and in trioxalatochromate (III) is Y. Then the...
- In gaseous triethyl amine the "–C–N–C" bond angle is________degree.
- For water at 100°C and 1 bar, _ vap H- _ vap U=_______ 10^2J mol^ -1 . (Round off to the Nearest Integer) [Assume volume of...
- PCl_5 PCl_3+Cl_3, K_C = 1.844. 3.0 moles of PCl_5 is introduced in a 1 L closed reaction vessel at 380 K. The number of moles of...
- The difference between bond orders of CO and NO^+ is x 2 where x =_________. (Round off to the Nearest Integer)
- Which one of the following set of elements can be detected using sodium fusion extract ?
- Match List- I with List II. List - I: (a) Li (b) Na (c) K (d) Cs List - II: (i) photoelectric cell (ii) absorbent of CO_2 (iii)...Not in JEE Main or NEET syllabus
- Assertion A : SO_2(g) is adsorbed to a large extent than H_2(g) on activated charcoal. Reason R : SO_2(g) has a higher critical...Not in JEE Main or NEET syllabus
- The CORRECT order of first ionization enthalpy is :
- Statements I : Hyperconjugation is a permanent effect. Statements II : Hyperconjugation in ethyl cation (CH_3- + C H_2) involves...
- Statement I : [Mn(CN)_6]^ 3- , [Fe(CN)_6]^ 3- and [CO(C_2O_4)_3]^ 3- are d^2sp^3 hybridised. Statement II : [MnCl_6]^ 3- , and...
- To an aqueous solution containing ions such as Al^ 3+ , Zn^ 2+ , Ca^ 2+ , Fe^ 3+ , Ni^ 2+ , Ba^ 2+ and Cu^ 2+ were added conc....