List of top Chemistry Questions

If the half cell reactions are given as (i) $Fe ^{2+}(a q)+2 e^{-} \rightarrow Fe (s) ;\,\,E^{\circ}=-0.44\, V$ (ii) $2 H ^{+}(a q)+\frac{1}{2} O _{2}(g)+2 e^{-} \rightarrow H _{2} O (l)$ $E^{\circ}=+1.23\, V$ The $E^{\circ}$ for the reaction $Fe (s)+2 H ^{+}+\frac{1}{2} O _{2}(g) \rightarrow Fe ^{2+}(a q)+ H _{2} O (l)$ is
The strongest Lewis acid among boron halides is
The complex showing a spin only magnetic moment of $2.82\, BM$ is
The most adsorbed gas on activated charcoal is
Which of the following have been arranged in decreasing order of oxidation number of sulphur?
Which of the following is a disaccharide?
Which of the following compounds does not leave residue on heating ?
Which of the following compounds dissolve in water?
Platinum, palladium and iridium are called ?noble metals? because
By slow distillation of rubber which of the following is obtained?
The letter $'D'$ in $D-glucose$ signifies____
The $ E_{{{M}^{3+}}/M{{n}^{2+}}}^{o} $ values for $ Cr, Mn, Fe $ and $ Co $ are $ -0.41,+1.57,+0.77 $ and $ +1.97\,V $ respectively. For which one of these metals the change in oxidation state from $+ 2$ to $+ 3$ is easiest?
The effective electrophile in aromatic. sulphonation is
Which one of the following statements is not correct?

A uniform cube of side a and mass m rests on a rough horizontal table. A horizontal force F is applied normal to one of the faces at a point directly above the centre of the face, at a height 3a/4 above the base. The minimum value of F for which the cube begins to topple on an edge is (assume the cube does not slide): 

The oxidation states of sulphur in the anions SO₃²⁻, S₂O₄²⁻ and S₂O₆²⁻ follow the order
Which of the following combinations of properties would be most desirable for a cooking pot?

Assuming the diodes to be of silicon with forward resistance zero, the current I in the following circuit is 

Given the numbers : 161 cm, 0.161 cm, 0.0161 cm. The number of significant figures for the three numbers are
The intermediate formed during the addition of HCl to propene in the presence of peroxide is
Which of the following has zero dipole moment?

Keto–enol tautomerism is observed in

Which one of the following contain isopropyl group?
The statement which is not correct about control of particulate pollution is:
Chief source of soil and water pollution is: