List of top Chemistry Questions

The edge length of a $fcc$ ionic crystal is 508 pm. If the radius of cation is 110 pm, the radius of anion will be

The drug chloramphenicol is an/a

In the reaction, ${PH_3 + HI ? PH_4I, PH_3}$ is behaving like

In case of physical adsorption there is desorption when

${Cu^{2+}}$ is

${CsCl}$ has a crystal structure of

Bakelite is an example of a

Structure of a mixed oxide is cubic close packed $(ccp)$. The cubic unit cell of mixed oxide is composed of oxide ions. One fourth of the tetrahedral voids are occupied by divalent metal A. The octahedral voids are occupied by a monovalent metal B. The formula of the oxide is

The coagulation of 200 mL of a positive colloid took place when 0.73 g HCl was added to it without changing the volume much. The flocculation value of HCl for the colloid is

The composition of ?copper matte? is,

The complex formed when $Al_2O_3$ is leached from Bauxite using concentrated NaOH solution is,

Sulphur sol contains

Reactions in zeolite catalyst depend on,

Main axis of a diatomic molecule is $Z$, molecular orbital $p_x $ and $ p_y$ overlaps to form, which of the following orbitals?

$HCl$ gas is covalent and $NaCl$ is an ionic compound. This is because

The carbocation formed in $ S_N1 $ reaction of alkyl halide in the slow step is:

For the reaction $2SO_2 + O_2$ (excess) $\rightarrow\, 2SO_3$ the order of reaction with respect to $O_2$ is

The value of ($\Delta H - \Delta E$) for the reaction $C_6H_6(1) + 7\frac{1}{2} O_2(g) \rightarrow 6CO_2(g) + 3H_2O(I)$ at 270C is (R = 2 cal K-1 mol-1)

Complete hydrolysis of starch gives :

Which of the vitamins given below is water soluble?

Nitrogen and Oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen. The reaction between nitrogen and oxygen requires high temperature.

Chlorine water on standing loses its colour and forms :

The rate constant of the reaction \( A \rightarrow B \) at different times are given below: \[ \text{Concentration (M)} \quad \text{Time (Minutes)}
0.069 \quad 0 \quad 0.052 \quad 17 \quad 0.035 \quad 34 \quad 0.018 \quad 51 \] The rate constant of the reaction according to the correct order of reaction is

\( X' \) and \( Y' \) respectively are

Identify \( Z \) in the following reaction sequence \[ CH_3CH_2CH_2OH \xrightarrow{H_2SO_4, 160^\circ C} CH_3CH_2CH = CH_2 \xrightarrow{NaNH_2} Z \]