Chemistry questions
29404 published questions with worked solutions.
- In the structure of SF_ 4 , the lone pair of electrons on S is in
- A student needs to prepare a buffer solution of propanoic acid and its sodium salt with pH 4. The ratio of [CH_ 3 CH_ 2 COO^ -...
- Match List-I with List-II List-I: (a) Negatively charged sol (b) Macromolecular colloid (c) Positively charged sol (d) Cheese...Not in JEE Main or NEET syllabus
- Match List-I with List-II: List-I (Oxide): (a) Cl_ 2 O_ 7 (b) Na_ 2 O (c) Al_ 2 O_ 3 (d) N_ 2 O List-II (Nature): (I) Amphoteric...
- In the metallurgical extraction of copper, following reaction is used : FeO + SiO_ 2 FeSiO_ 3 . FeO and FeSiO_ 3 respectively are.Not in JEE Main or NEET syllabus
- Hydrogen has three isotopes: protium (^ 1 H), deuterium (^ 2 H or D) and tritium (^ 3 H or T). They have nearly same chemical...
- Among the given oxides of nitrogen ; N_ 2 O, N_ 2 O_ 3 , N_ 2 O_ 4 and N_ 2 O_ 5 , the number of compound/(s) having N – N bond...
- Correct statement about photo-chemical smog is:Not in JEE Main or NEET syllabus
- With respect to the following reaction, consider the given statements: aniline + HNO_ 3 , H_ 2 SO_ 4 , 288 K products (a)...
- Given below are two statements, one is Assertion (A) and other is Reason (R). Assertion (A): Natural rubber is a linear polymer...Not in JEE Main or NEET syllabus
- When sugar 'X' is boiled with dilute H_ 2 SO_ 4 in alcoholic solution, two isomers 'A' and 'B' are formed. 'A' on oxidation with...
- 100 g of an ideal gas is kept in a cylinder of 416 L volume at 27°C under 1.5 bar pressure. The molar mass of the gas is _____ g...
- For combustion of one mole of magnesium in an open container at 300 K and 1 bar pressure, cH^ = −601.70 kJ mol^ -1 , the...
- 2.5 g of protein containing only glycine (C_ 2 H_ 5 NO_ 2 ) is dissolved in water to make 500 mL of solution. The osmotic...
- For the given reactions Sn^ 2+ + 2e^ - Sn and Sn^ 4+ + 4e^ - Sn, the electrode potentials are; E^ (Sn^ 2+ /Sn) = −0.140 V and E^...
- [Fe(CN)_ 6 ]^ 4- [Fe(CN)_ 6 ]^ 3- [Ti(CN)_ 6 ]^ 3- [Ni(CN)_ 4 ]^ 2- [Co(CN)_ 6 ]^ 3- Among the given complexes, number of...
- (a) CoCl_ 3 4NH_ 3 , (b) CoCl_ 3 5NH_ 3 , (c) CoCl_ 3 6NH_ 3 and (d) CoCl(NO_ 3 )_ 2 5NH_ 3 . Number of complex(es) which will...
- The complete combustion of 0.492 g of an organic compound containing 'C', 'H' and 'O' gives 0.793 g of CO_ 2 and 0.442 g of H_ 2...
- 0.01 M KMnO_ 4 solution was added to 20.0 mL of 0.05 M Mohr's salt solution through a burette. The initial reading of 50 mL...
- The Zeta potential is related to which property of colloids?Not in JEE Main or NEET syllabus