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Which of the following reagent react differently with HCHO and CH₃CHO and CH₃COCH₃
What is the product obtained when chlorine reacts with ethyl alcohol in the presence of NaOH?
Propyne on hydrolysis in presence of HCl and HgSO₄ gives
Which species represents the electrophile in aromatic nitration?
On heating glucose with Fehling's solution we get a precipitate whose colour is
Amides may be converted into amines by a reaction named after
Just before attaining equilibrium by a reversible reaction, it is found that
In a chemical equilibrium Kc = Kp when :
2C(s) + 2O2g → 2CO2(g) , ΔH = − 787 k J
H2(g) + 1/2O2g → H2O(l) , ΔH = − 286 k J
C2H2(g) + O2g → 2CO2+ H2Ol , ΔH = − 1301 k J
Heat of formation of acetylene is
The dyes attached to the fibres themselves by irreversible chemical reactions are
In the diazotisation of aniline the excess of hydrochloric acid is used primarily with sodium nitrite because it
phenyl isocyanides are prepared from which of the following reactions ?
When 2.5 amp. of current passed through CuSO4 solution for 6 min. 26 sec. the amount of copper deposited is
The slag obtained during the extraction of copper from pyrites is composed mainly of
A container contains 1 mole of a gas at 1 atm pressure and 27oC, and its volume is 24.6 ltres. If pressure is 10 atm and temperature 327oC, then new volume is approximately
In the reaction 4Fe + 3O₂ → 4Fe3+ + 6O₂- which of the following statement is incorrect ?