Chemistry questions
29404 published questions with worked solutions.
- The compound(s) that is(are) removed as slag during the extraction of copper is (A) CaO (B) FeO (C) Al_ 2 O_ 3 (D) ZnO (E) NiO...Not in JEE Main or NEET syllabus
- Choose the correct order of density of the alkali metals.Not in JEE Main or NEET syllabus
- The geometry around boron in the product 'B' formed from the following reaction is BF_ 3 + NaH (450 K) A + NaF A + NMe_ 3 B
- The interhalogen compound formed from the reaction of bromine with excess of fluorine is a :
- The photochemical smog does not generally contain :Not in JEE Main or NEET syllabus
- Drugs used to bind to receptors, inhibiting its natural function and blocking a message are called:Not in JEE Main or NEET syllabus
- Among the following species N_ 2 , N_ 2 ^ + , N_ 2 ^ - , N_ 2 ^ 2- , O_ 2 , O_ 2 ^ + , O_ 2 ^ - , O_ 2 ^ 2- the number of species...
- The enthalpy of combustion of propane, graphite and dihydrogen at 298 K are −2220.0 kJ mol^ -1 , −393.5 kJ mol^ -1 and −285.8 kJ...
- The pressure of a moist gas at 27°C is 4 atm. The volume of the container is doubled at the same temperature. The new pressure of...
- The cell potential for Zn|Zn^ 2+ (aq)||Sn^ x+ |Sn is 0.801 V at 298 K. The reaction quotient for the above reaction is 10^ -2 ....
- The half-life for the decomposition of gaseous compound A is 240 s when the gaseous pressure was 500 torr initially. When the...
- Consider the following metal complexes: [Co(NH_ 3 )_ 6 ]^ 3+ [CoCl(NH_ 3 )_ 5 ]^ 2+ [Co(CN)_ 6 ]^ 3- [Co(NH_ 3 )_ 5 (H_ 2 O)]^ 3+...
- The number of sp^ 3 hybridised carbons in an acyclic neutral compound with molecular formula C_ 4 H_ 5 N is _____ .
- At 25°C and 1 atm pressure, the enthalpies of combustion of benzene (l) and acetylene (g) are −3268 kJ mol^ -1 and −1300 kJ mol^...
- Solute A associates in water. When 0.7 g of solute A is dissolved in 42.0 g of water, it depresses the freezing point by 0.2°C....
- The K_sp for bismuth sulphide (Bi_ 2 S_ 3 ) is 1.08 10^ -73 . The solubility of Bi_ 2 S_ 3 in mol L^ -1 at 298 K is
- The correct order of electron gain enthalpies of Cl, F, Te and Po is
- Given below are two statements Statement-I: During electrolytic refining, blister copper deposits precious metals. Statement-II:...Not in JEE Main or NEET syllabus
- The correct order of reduction potentials of the following pairs is (A) Cl_ 2 /Cl^ - , (B) I_ 2 /I^ - , (C) Ag^ + /Ag, (D) Na^ +...
- The number of bridged oxygen atoms present in compound B formed from the following reactions is: Pb(NO_ 3 )_ 2 (673 K) A + PbO +...