List of top Chemistry Questions

Which one is the wrong statement ?

The conversion of ethyl bromide to ethyl iodide using sodium iodide and dry acetone, this reaction is known as

Identify the correct statement in the following

Bactericidal antibiotics among the following is

A reaction has both $\Delta \,H$ and $\Delta \,S$ - ve The rate of reaction

Addition of mineral acid to an aqueous solution of Borax, the following compound is formed

Which of the following element forms $p_{\pi} - p_{\pi}$ bond with itself ?

Which of the following structure of a molecule is expected to have three bond pairs and one lone pair of electrons ?

Which of the following is the correct electron dot structure of $N_2O$ molecule ?

Which of the following aqueous solution has highest freezing point ?

The co-ordination number and the oxidation state of the element $'M'$ in the complex $[ M(en)_{2}(C_{2}O_{4})]NO_{2}$ $\{$ where (en) is ethane-1,2-diamine) are, respectively

For a first order reaction $A \to P,$ the temperature (T) dependent rate constant (k) was found to followthe equation log k=- (2000) $\frac{1}{T}+6.0.$ The pre-exponential factor A and the activation energy $E_{a,}$ respectively, are

For the reaction $H _{2}( g )+ Br _{2}( g ) \rightarrow 2 HBr ( g )$, the experiment data suggested that $r = k \left[ H _{2}\right]\left[ Br _{2}\right]^{1 / 2} .$ The molecularity and order of the reaction are respectively:

For the reaction $CO ( g )+\frac{1}{2} O _{2}( g ) \rightarrow CO _{2}( g )$ Which one of the statement is correct at constant $T$ and $P$ ?

The electronegativities of $C, N, Si$ and $P$ are in the order of

Which one of the following is not a common component of photo-chemical smog ?

Which of the following is not a biodegradable polymer ?

Which of the following atoms should have the highest $1^{\text{st}]$ electron affinity?

The osmotic pressure of solution containing $34.2 \,g$ of cane sugar (molar mass = $342 \, g \, mol^{-1}$) in 1L of solution at $20^{\circ} C$ is (Given, $R = 0.082 \, L \, atm \, K^{-1} \, mol^{-1}$)

In assigning $R-S$ configuration which among the following groups has highest priority ?

The amino acid which is basic in nature is

Aldehydes or ketones when treated with $\ce{C_6H_5 - NH - NH_2}$, the product formed is

Which among the following compounds does not act as a reducing agent ?

Solubility of which among the following solids in water changes slightly with temperature ?

Which among the following reactions is an example of pseudo first order reaction ?