List of top Chemistry Questions

Among the following the strongest nucleophile is

Which types of isomerism is shown by $2, 3$-dichlorobutane ?

At $90^{\circ} C$, pure water has $H _{3} O ^{+}$ion concentration of $10^{-6} mol / L ^{-1}$. The $K_{w}$ at $90^{\circ} C$ is :

For the reaction $ {2NO2(g) <=> 2\,NO(g) + O2(g)}$ $\left(K_{c} = 1.8\times10^{-6} \,at \,184^{\circ}C\right)$ $\left(R = 0.00831 \,k J/\left(mol. K\right)\right)$ When $K_{p}$ and $K_{c}$ are compared at $184^{\circ}$ C it is found that :

Hydrogen ion concentration in mol/L in a solution of pH = 5.4 will be :

What is the conjugate base of $OH^-$ ?

When $10\, mL$ of $0.1\, M$ acetic acid $(pK_{a} = 5.0)$ is titrated against $10\, mL$ of $0.1\, M$ ammonia solution $(pK_{b} = 5.0)$, the equivalence point occurs at $pH$

Hydrogen bomb is based on the principle of :

The material used in warfare in making smoke screens for military purposes is:

Glucose has difference from fructose in that it

The temperature-entropy diagram of a reversible engine cycle is given in the figure. Its efficiency is:

The liquid crystal method is applicable to locate avein in the body because

The compound used for the preparation of $UF_6$ in the enrichment of ${92}_U^{235}$ is

The highest electrical conductivity of the following aqueous solutions is of:

The hardest substance is:

The extraction of which of the following metals involves bessemerisation?

Pyridine is less basic than triethylamine because

One mole of monoatomic ideal gas expands adiabatieally at initial temperature T against a constant external pressure of I atm from 1 L to 2 L. Find out the final temperature $(R = 0.0821\: atm \: K^{-1}m oI^{-1})$

Ionic compounds are formed most easily with:

Number of unpaired electrons in $Mn^{4+}$ is :

Number of isomers possible for $ {{C}_{4}}{{H}_{8}}O $ is:

Which of the following is a carbonate ore?

Schottky defect generally appears in:

Which of the following is fully fluorinated polymer ?

Which of the following is electron deficient molecule ?