List of top Chemistry Questions

IUPAC Name of Acetone is

The no. of pi bond present in benzoic acid option

What are the 4 types of hydrocarbons?

Highest viscosity is exhibited by

Which reagent will you use for the following reaction? $ {CH3CH2CH2CH3 -> CH3CH2CH2CH2Cl + CH3CH2CHClCH3}$

Consider the reaction 2A + B →products, when the concentration of A alone was doubled, the half-life of the reaction did not change. When the concentration of B alone was doubled, the rate was not altered. The unit of rate constant for this reaction is

0.400 g of impure CaSO4 (Molar mass = 136) solution when treated with excess of barium chloride solution, gave 0.617 g of anhydrous BaSO4 (Molar mass = 233). The percentage of CaSO4 present in the sample is

The following reaction is an example of

0.066 g of a metal was deposited when a current of 2 ampere passed for 100 seconds through an aqueous solution of its metal ion. The equivalent mass of the metal is-

The energy of electron in 1st orbit of Hydrogen atom is –2.18 × 10^-18 Joule. The third ionisation energy of Li⁺² ion is

Which of the following type of compound is used to increase the hardness of the silicone polymer.

In $P{O}_4^{3-}$the formal charge on each oxygen atom and P − O bond order respectively are

The solubility product of silver chloride is 1.8 × 10^-10 at 298 k. The solubility of AgCl in 0.01 M KCl aqueous solution in mol dm^-3 is

The actinoids exhibit more number of oxidation states in general than the lanthanoids because

Among the following complex compounds–${\mathrm{K}}_3[\mathrm{Fe}(\mathrm{CN}{)}_6]$$(i)$$\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]{\mathrm{Cl}}_3$(ii) ${\mathrm{K}}_2[\mathrm{Pt}(\mathrm{CN}{)}_4]$$(\mathrm{iii})$$\left[\mathrm{Zn}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]{\left({\mathrm{NO}}_3\right)}_2$$(iv)$diamagnetic complexes are –

products can be

Which of the following statements about natural rubber is true?

A sample containing 1.0 mole of an ideal gas is expanded reversibly and isothermally to ten times its original volume in two separate experiments. The expansion is carried out at 300 K and 600 K, respectively. Choose the correct option.

A compound 'X' on heating gives a colourless gas. The residue is dissolved in water to obtain 'Y'. Excess CO2 is passed through aqueous solution of 'Y', when 'Z' is formed. 'Z', on gentle heating, gives back 'X'. The compound 'X' is

In OF2, H2O and OCl2, there is sp³ hybridisation of central atom. The bond length and bond angle of OF2, H2O and OCl2 are given as:

Which of the following is the correct statement about the differences in the bond angles of the compounds given above?

Acylation of the benzene ring is brought about by reacting it with acid halides in the presence of a Lewis acid. The compound ‘X’ used to bring about the above conversion is

Consider the following reactions, ‘I’ and ‘II’:

Which of the above reactions effectively give(s) 4-methyl hex-2-yne?

At a certain temperature, the vapour pressures of benzene and toluene are 119 torr and 37 torr, respectively. The mole fraction of toluene in the vapour phase, which is in equilibrium with a solution of benzene and toluene in 1 : 1 molar ratio, is

Which of the following statements are correct with respect to the unit of radioactivity?(i) The SI unit of radioactivity is curie [Ci].(ii) 1 Ci = 3.7 x 10^-10 dps(iii) 1 Bq = 3.7 x 10^-10 Ci(iv) The SI unit of radioactivity is becquerel (Bq).(v) 1 Ci = 3.7 x 10¹⁰ Bq

The coordination number of Ni²⁺ is 4.NiCI2 + KCN (excess) → A (cyano complex)A + conc. HCI (excess) → B (chloro complex)The IUPAC names of A and B, respectively, are