List of top Chemistry Questions

Which of the following solutions will have the highest boiling point?

Maximum freezing point falls in

NH

The reaction,$2SO_{2(g)} + O_{2(g)} \leftrightharpoons 2SO_{3(g)}$ is carried out in a $1\, dm^3$ vessel and $2 \,dm^3$ vessel separately. The ratio of the reaction velocities will be :

An artificial radioactive isotope gave ${^{14}_{7}N}$ after two successive $\beta$ -particle emissions. The number of neutrons in the parent nucleus must be :

The correct statement in respect of protein haemoglobin is that it

The frequency of radiation emitted when the electron falls from $n = 4$ to $n = 1$ in a hydrogen atom will be (Given ionisation energy of $H = 2.18\times 10^{18} $J $atom^{-1}$ and $h = 6.625 \times 10^{-34} Js)$

If the boiling point of ethanol (molecular weight = 46) is $ \text{78}{{\,}^{\text{o}}}\text{C,} $ what is the boiling point of diethyl ether ? (molecular weight =74)

What are X and Y in the reaction $ {{C}_{2}}{{H}_{4}}+{{H}_{2}}S{{O}_{4}}\xrightarrow{80{{\,}^{o}}C}X({{H}_{2}}O./\Delta a)Y $

The values of four quantum numbers of valence electron of an element are $ n=4,l=0,m=0 $ and $ s=+\frac{1}{2}. $ The element is:

The number of oxygen atoms bonded to each phosphorus atom in P$_4O_{10}$ is

Gun metal is an alloy of:

The hormone that helps in the conversion of glucose to glycogen is

You are required to draw blood from a patient and to keep it in a test tube for analysis of blood corpuscles and plasma. You are also provided with the following four types of test tubes. Which of them will you not use for the purpose?

The chemical equilibrium of a reversible reaction is not influenced by :

Which of the following statement is not correct?

Glucose on oxidation gives the acid containing the C-chiral atoms equal to

The molecular formula of diphenyl methane How many structural isomers are possible when one of the hydrogen is replaced by a chlorine atom?

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere

Reaction of $HBr$ with propene in the presence of peroxide gives

Variable oxidation state and degenerated orbital shows:

What amount of water is added in $40\, mL$ of $NaOH (0.1\, N )$ which is neutralized by $50 \,mL$ of $HCl (0.2 N ) ?$

Steroid hormone is derived from :

Which of the following is more acidic in nature?