The velocity constant for a reaction is 0.693 × 10-1 min-1 and intial concentration is 0.2 mol/L, the half-life periods is
400s
600s
800s
100s
For the chemical reaction N2 + 3H2 → 2NH3, if
1 × 10-4 mol L-1 s-1
3 × 10-4 mol L-1 s-1
4 × 10-4 mol L-1 s-1
6 × 10-4 mol L-1 s-1
E°= -0.44V for the reaction, Fe2+ + 2e- → Fe and E°= -0.76 V for the reaction, Zn2+ + 2e- → Zn. Which of the following statement is correct?
Fe is more electropositive
Zn is more electropositive
Zn is more electronegative
None of the above
For the electrolysis of aqua CuSO4 solution using inert Pt electrodes, the reaction on anode
Cu2+ + 2e- → Cu
2H2O → O2 + 4H++ 4e-
2H+ + 2e- → H2
Which of the following chemical reactions is homogeneous catalytic reaction?
N2(g) + 3H2(g) 2NH3(g)
2SO2(g) + O2(g) 2SO3 (g)
CO(g) + 3H2(g) CH4(g) + H2O (g)
2SO2(g) + O2(g)
In which of the following compound the oxidation number of oxygen is +2?
H2O2
CO2
H2O
OF2
D.
OF2
Let the oxidation state ofoxygen is 'x'
OF2
x + 2(-1) = 0 [∴ F is most electronegative]
x = +2
Hence, the oxidation state of oxygen is +2 in OF2.
[(C6H5)2Pd(NCS)2] and [(C6H5)2Pd(SCN)2] are
bond isomeric
coordinated isomeric
ionic isomeric
geometrical isomeric
In which of the following complex compounds the oxidation number of the metal is zero?
[Pt(NH3)2Cl2]
[Cr(CO)6]
[Cr(NH3)3Cl3]
[Cr(en)2Cl2]
Transitional elements are mostly
diamagnetic
paramagnetic
neither diamagnaetic nor paramagnetic
diamagentic and paramagnetic both
In which of the following compounds carboxylic group (-COOH) is not present?
Acetic acid
Lactic acid
Benzoic acid
Picric acid