List of top Chemistry Questions

Assertion (A): MgSO4 is readily soluble in water.
Reason (R): The greater hydration enthalpy of Mg2+ ions overcomes its lattice enthalpy.
At T (K), x g of a non-volatile solid (molar mass 78 g mol$^{-1}$) when added to 0.5 kg water, lowered its freezing point by 1.0°C. What is x (in g)? (K$_f$ of water at T(K) = 1.86 K kg mol$^{-1}$)
The rate constant for a zero order reaction A → products is 0.0030 mol L$^{-1}$ s$^{-1}$. How long will it take for the initial concentration of A to fall from 0.10 M to 0.075 M?
Arrange the following in decreasing order of their pK$_b$ values:
Arrange the following in decreasing order of their pKb values:
Which hormone tends to increase the blood glucose level in humans?
Which of the following molecules is eliminated during peptide bond formation?
When 1-chlorobutane is treated with aqueous KOH it gives P. However, when treated with alcoholic KOH it gives Q. Identify P and Q respectively.
In the presence of peroxide, styrene reacts with HBr to give X. When X is treated with magnesium in dry ether followed by CO$_2$ and hydrolysis, Y is formed. Treatment of Y with PCl$_5$, then with H$_2$/Pd-BaSO$_4$ gives Z. What is Z?
Arrange the following in increasing order of their reactivity for nucleophilic addition reaction:
Arrange the following in increasing order of their reactivity for nucleophilic addition reaction:
Identify the major product formed from the following:
Nai/dry acetone
Identify the major product formed in the following reaction sequence:
ch3cocl/anhyd alcl3
The diameter range of colloidal particles is approximately:
Which of the following is correct related to the colours of TiCl$_3$ (X) and [Ti(H$_2$O)$_6$]Cl$_3$ (Y)?
The catalyst used in the manufacture of polyethylene is a mixture of
Assertion (A): HCl gas is dried by passing through concentrated H$_2$SO$_4$
Reason (R): HCl gas reacts with NH$_3$ that gives white fumes
Photographic plates are prepared by coating emulsion of which of the following in gelatin?
What are x and y in the following reaction?
$x \text{Pb}_3\text{O}_4 \rightarrow y \text{PbO} + \text{O}_2$
The reduction potential of hydrogen electrode at 25°C in a neutral solution is (P$_{H_2}$ = 1 bar)
If molten NaCl contains SrCl$_2$ as impurity, crystallization can generate
Assertion (A): Blood cells collapse when suspended in saline water
Reason (R): Cell membrane dissolves in saline water
The number of network solids and ionic solids in the list given below is respectively
H$_2$O (ice), AlN, Cu, CaF$_2$, diamond, MgO, CCl$_4$, ZnS, Ag, NaCl, SiO$_2$
The compound or ion which is not aromatic in the following is
The correct order of acidity of the following is:
order of acidity
Which of the following tetrahalides does not exist?
Identify the correct statements about Boron:
I. It has high melting point.
II. It has high density.
III. It has high electrical conductivity.
IV. B-10 isotope of it has high ability to absorb neutrons