Question Bank Directory

Which one of the following statements is incorrect?

The correct bond order in the following species is:

Chloropicrin is obtained by the reaction of:

For transistor action, which of the following statements is correct?

Match the oxide given in Column-I with its property given in Column-II: **Column-I** (i) $Na_2O$ (ii) $Al_2O_3$ (iii) $N_2O$ (iv) $Cl_2O_7$ **Column-II** (a) Neutral (b) Basic (c) Acidic (d) Amphoteric Which of the following options is correct?

Considering the state of hybridisation of carbon atoms, find out the molecule among the following which is linear.

Which pair of ions among the following list do not constitute an iso-electronic pair?

Amongst the following, which one will have maximum 'lone pair - lone pair' electron repulsions?

The tendency of $\text{BF}_3$, $\text{BCl}_3$, and $\text{BBr}_3$ to behave as Lewis acid decreases in the sequence:

Which molecule among the following is non-polar?

Dipole-induced dipole interactions are present in which of the following pairs?

The Van't Hoff factor for 0.1 M Ba(NO₃)₂ solution is 2.74. The degree of dissociation is:

The correct order of ionic character among CaH$$_2$$, BeH$$_2$$ and BaH$$_2$$ is:

The rate of the reaction $2N_2O_5 \rightarrow 4NO_2 + O_2$ can be written in three ways: $-\frac{d[N_2O_5]}{dt} = k[N_2O_5]$ $\frac{d[NO_2]}{dt} = k'[N_2O_5]$ $\frac{d[O_2]}{dt} = k''[N_2O_5]$ The relationship between $k$ and $k'$ and between $k$ and $k''$ are:

E.coli has only 4.6 × 10^6 base pairs and completes the process of replication within 18 minutes, then the average rate of polymerization is approximately:

The correct order of increasing thermal stability of $\text{K}_2\text{CO}_3$, $\text{MgCO}_3$, $\text{CaCO}_3$ and $\text{BeCO}_3$ is:

Beans get cooked earlier in a pressure cooker, because:

The correct shape and hybridisation of BrF$_5$ is:

If the rate of reaction doubles when the temperature is raised from $20^\circ\text{C}$ to $35^\circ\text{C}$, then the activation energy for the reaction will be : ($R = 8.314 \text{ J mol}^{-1} \text{ K}^{-1}$)

For the reaction, $5Br^- + BrO_3^- + 6H^+ \rightarrow 3Br_2 + 3H_2O$, the correct representation of the consumption and formation of reactants and products is: