Chemistry questions
29404 published questions with worked solutions.
- Given below are the critical temperatures of some of the gases : Gas — Critical temperature (K): He — 5.2; CH_ 4 — 190; CO_ 2 —...Not in JEE Main or NEET syllabus
- In liquation process used for tin (Sn), the metal :Not in JEE Main or NEET syllabus
- Given below are two statements. Statement I : Stannane is an example of a molecular hydride. Statement II : Stannane is a planar...Not in JEE Main or NEET syllabus
- Which of the following 3d-metal ion will give the lowest enthalpy of hydration ( _ hydH ) when dissolved in water ?
- Dinitrogen is a robust compound, but reacts at high altitude to form oxides. The oxide of nitrogen that can damage plant leaves...
- When enthanol is heated with conc. H_ 2 SO_ 4 , a gas is produced. The compound formed, when this gas is treated with cold dilute...
- Which of the following is NOT a natural polymer?Not 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 : Amylose is...
- A compound 'X' is a weak acid and it exhibits colour change at pH close to the equivalence point during neutralization of NaOH...
- Consider, PF_ 5 , BrF_ 5 , PCl_ 3 , SF_ 6 , [ICl_ 4 ]^ - , ClF_ 3 and IF_ 5 . Amongst the above molecule(s)/ion(s), the number of...
- 1.80 g of solute A was dissolved in 62.5 cm^ 3 of ethanol and freezing point of the solution was found to be 155.1 K. The molar...
- For a cell, Cu(s)|Cu^ 2+ (0.001M)||Ag^ + (0.01M)|Ag(s) the cell potential is found to be 0.43 V at 298 K. The magnitude of...
- Sum of oxidation state (magnitude) and coordination number of cobalt in Na[Co(bpy)Cl_ 4 ] is _____. (Given bpy = 2,2'-bipyridine)
- Consider the following sulphure based oxoacids. H_ 2 SO_ 3 , H_ 2 SO_ 4 , H_ 2 S_ 2 O_ 8 and H_ 2 S_ 2 O_ 7 . Amongst these...
- A 1.84 mg sample of polyhydric alcoholic compound 'X' of molar mass 92.0 g/mol gave 1.344 mL of H_ 2 gas at STP. The number of...
- The number of stereoisomers formed in a reaction of ( ) Ph(C=O)C(OH)(CN)Ph with HCN is _____.
- Which of the following pair of molecules contain odd electron molecule and an expanded octet molecule?
- N_ 2 (g) + 3H_ 2 (g) 3NH_ 3 (g) (20 g of N_ 2 and 5 g of H_ 2 ) Consider the above reaction, the limiting reagent of the reaction...
- 100 mL of 5% (w/v) solution of NaCl in water was prepared in 250 mL beaker. Albumin from the egg was poured into NaCl solution...Not in JEE Main or NEET syllabus
- The first ionization enthalpy of Na, Mg and Si, respectively, are: 496, 737 and 786 kJ mol^ -1 . The first ionization enthalpy...