List of top Chemistry Questions

Which of the following is dihydric alcohol?
Which of the following molecules has pyramidal shape?
Number of isomers possible for $C_{4}H_{8}O$ is
Which of the following oxide of nitrogen is most thermally stable?
Which of the following statements is incorrect?
Which one of the given transition metal ions is diamagnetic?
Which reaction is used for the preparation of acetophenone?
Which of the following element shows maximum valency?
The stability of complexes of $ C{{u}^{2+}},\,\,N{{i}^{2+}},\,\,C{{o}^{2+}} $ and $ F{{e}^{2+}} $ varies in the order:
Which of the following molecules has pentagonal bipyramidal shape?
The acidity of hydrides of $O , S , Se$, Te varies in the order :
The relative Lewis acid character of boron trihalides is in the order:
Which of the following statements is incorrect?
The bond order of $ O_{2}^{+},\,\,{{O}_{2}},\,\,O_{2}^{2-} $ and $ O_{2}^{-} $ varies in the order:
Molecular orbital electronic configuration for $' X'$ anion is : $K K^{*}(\sigma 2 s)^{2}\left(\sigma^{*} 2 s\right)^{2}\left(\pi 2 p_{x}\right)^{2}\left(\pi 2 p_{y}\right)^{2}\left(\sigma 2 p_{z}\right)^{2}$ $\left(\pi^{*} 2 p_{x}\right)^{1}$. The anion ' $X$' is :
The mass of a photon with wavelength $ 3.6\,??$ is:
An electron with values $4, 2, -2$ and $+1/2$ for the set of four quantum numbers $ n,\,\,l,\,\,{{m}_{l}} $ and $ s $ respectively, belongs to:
Which of the following compounds is the strongest acid?
Which of the following compounds has the highest boiling point?
Which of the following acts as pickling agent?
Which is chemically most active non-metal?
Which does not react with Fehling solution?
Variable valency is a general feature of
Which is used to obtain salicylic acid from phenol?
Two rigid boxes containing different ideal gases are placed on a table. Box $A$ contains one mole of nitrogen at temperature $T_0$, while box $B$ contains one mole of helium at temperature $(7/3)\, T_0$. The boxes are then put into thermal contact with each other, and heat flows between them until the gases reach a common final temperature (Ignore the heat capacity of boxes). Then, the final temperature of the gases, $T_f$, in terms of/$T_0$ is :