Chemistry questions
29404 published questions with worked solutions.
- Which one of the following alkaline earth metal ions has the highest ionic mobility in its aqueous solution?Not in JEE Main or NEET syllabus
- Cerium (IV) has a noble gas configuration. Which of the following is correct statement about it?
- Among the following which is the strongest oxidizing agent?
- Phenol on reaction with dilute nitric acid, gives two products. Which method will be most efficient for large scale separation?
- The IUPAC name of ethylidene chloride is -
- The major product in the reaction (CH_ 3 )_ 3 C-Cl + K^ + ^ - O-C(CH_ 3 )_ 3 ? is -
- The reaction of R-C(=O)-NH_ 2 with bromine and KOH gives RNH_ 2 as the end product. Which one of the following is the...
- Which one of the following is an example of artificial sweetner ?Not in JEE Main or NEET syllabus
- The number of N atoms in 681 g of C_ 7 H_ 5 N_ 3 O_ 6 is x 10^ 21 . The value of x is _____. (N_A = 6.02 10^ 23 mol^ -1 )...
- The distance between Na^ + and Cl^ - ions in solid NaCl of density 43.1 g cm^ -3 is _____ 10^ -10 m. (Nearest Integer) (Given :...Not in JEE Main or NEET syllabus
- The longest wavelength of light that can be used for the ionisation of lithium atom (Li) in its ground state is x 10^ -8 m. The...
- The standard entropy change for the reaction : 4Fe(s) + 3O_ 2 (g) 2Fe_ 2 O_ 3 (s) is −550 J K^ -1 at 298 K. [Given: The standard...
- 1 L aqueous solution of H_ 2 SO_ 4 contains 0.02 m mol H_ 2 SO_ 4 . 50% of this solution is diluted with deionized water to give...
- The standard free energy change ( G^ ) for 50% dissociation of N_ 2 O_ 4 into NO_ 2 at 27°C and 1 atm pressure is −x J mol^ -1 ....
- In a cell, the following reactions take place: Fe^ 2+ Fe^ 3+ + e^ - (E^ (Fe^ 3+ /Fe^ 2+ ) = 0.77 V) and 2I^ - I_ 2 + 2e^ - (E^...
- For a given chemical reaction _ 1 A + _ 2 B _ 3 C + _ 4 D, concentration of C changes from 10 m mol dm^ -3 to 20 m mol dm^ -3 in...
- If [Cu(H_ 2 O)_ 4 ]^ 2+ absorbs a light of wavelength 600 nm for d-d transition, then the value of octahedral crystal field...
- Number of grams of bromine that will completely react with 5.0 g of pent-1-ene is _____ 10^ -2 g. (Atomic mass of Br = 80 g/mol)...
- Haemoglobin contains 0.34% of iron by mass. The number of Fe atoms in 3.3 g of haemoglobin is (Given : Atomic mass of Fe is 56 u,...
- Arrange the following in increasing order of their covalent character. a. CaF_ 2 b. CaCl_ 2 c. CaBr_ 2 d. CaI_ 2 Choose the...