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
Octance number is zero of
Which species represents the electrophile in aromatic nitration?
Heterolysis of carbon-chlorine bond produces
DNA multiplication is called
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
[Ag(NH₃)₂]OH liberates silver when it reacts with
is fastest when X is
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
Which of the following reaction is endothermic?
In thermodynamics, a process is called reversible when
The dyes attached to the fibres themselves by irreversible chemical reactions are
In Fe(CO)₅ the Fe-C bond possesses
The IUPAC name of K₃[Ir(C₂O₄)₃] is
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 ?
Oxidation number of S in H₂S₂O₈ is
Strong electrolytes are those which
When 2.5 amp. of current passed through CuSO4 solution for 6 min. 26 sec. the amount of copper deposited is
Anisole with HNO₃ and conc. H₂SO₄ gives
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
Which of the following halides is the most stable?
Metaphosphoric acid has the formula
The largest bond angle is in
In the reaction 4Fe + 3O₂ → 4Fe3+ + 6O₂- which of the following statement is incorrect ?
Compound A below
Adsorbed acetic acid on activated charcoal is
Transition elements are
The number of ions formed on dissolving one molecule of FeSO₄ (NH₄)₂SO₄. 6H₂O is/are