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)
[(C6H5)2Pd(NCS)2] and [(C6H5)2Pd(SCN)2] are
bond isomeric
coordinated isomeric
ionic isomeric
geometrical isomeric
A.
bond isomeric
[(C6H5)2Pd(NCS)2] and [(C6H5)2Pd(SCN)2] are bond isomeric or linkage isomeric. Such type of isomers differ in the mode of attachment of ligand to central metal ion.
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