List of top Chemistry Questions

The molecularity of the following elementary reaction is NH4NO2 —> N2 + 2H20

Caprolactam is the starting material for

Consider the 1M aqueous solution of the following compounds and arrange than in the increasing order of elevation in the boiling points.
A. $C_6H_{12}O_6$
B. $NaCl $
C. $MgCl_2 $
D. $AlCl_3$
E. $Al_2(SO_4)_3 $
Choose the correct answer from the options given below:

Rate constant "k" for a certain reaction is k = $2.3 \times 10^{-5}$ $L$ $mol^{-1}$ $s^{-1}$. Order of the reaction is:

Match list I with list II

	List I		List II
A	Siderite	I	Aluminum
B	Malachite	II	Iron
C	Calamine	III	Copper
D	Bauxite	IV	Zinc

Choose the correct answer from the options given below:

Which one of the following is an emulsion?

Among the following statements choose the correct statements:

Analgesics reduce or abolish pain without causing impairment of consciousness, mental confusion.
Tranquilizers are neurological inactive drugs.
Morphine is the example of non- narcotic analgesics.
Disinfectants are applied to inanimate objects whereas antiseptics are applied to the living tissues.
Same substance can act as an antiseptic as well as disinfectant by varying the concentration.

Choose the correct answer from the options given below:

Which simple chemical test is used to distinguish between ethanal & propanal?

$A°$ $m$ for $NaCl$, $HCl$ and $NaAc$ are $126.4, 425.9$ and $91.0$ $S$ $cm^2 $ $mol^{-1 }$respectively. Calculate $A°$ for $HAc$

Which of the following is not the characteristic of physisorption?

The products formed at cathode and anode by electrolysis of aqueous NaCl solution respectively are

$250$ $g$ solution of $D-glucose$ in water contains 10.8% of carbon by weight. The molality of the solution is nearest to (Given: Atomic Weights are, $H, 1 u; C, 12 u; O, 16 u$)

The limiting molar conductivities of $NaI$, $NaNO_3$ and $AgNO_3$ are $12.7$, $12.0$ and $13.3$ mS m² mol^–1, respectively (all at 25°C). The limiting molar conductivity of $AgI$ at this temperature is ____ mS m² mol^–1.

A rigid nitrogen tank stored inside a laboratory has a pressure of 30 atm at 06:00 am when the temperature is 27°C. At 03:00 pm, when the temperature is 45°C, the pressure in the tank will be _______ atm. [nearest integer]

Given below are two statements :
Statement-I : For KI, molar conductivity increases steeply with dilution.
Statement-II : For carbonic acid, molar conductivity increases slowly with dilution.
In the light of the above statements, choose the correct answer from the options given below :

If the solubility product of PbS is 8 × 10^–28, then the solubility of PbS in pure water at 298 K is x × 10^–16mol L^–1. The value of x is ________. (Nearest integer)
[given : $\sqrt2=1.41$]

Consider the following set of quantum numbers.
$n \,|\, m_|$
A. 3 3 –3
B. 3 2 –2
C. 2 1 +1
D. 2 2 +2
The number of correct sets of quantum numbers is _____.

The correct stability order of the following diazonium salt is

correct stability order of the diazonium salt

Given below are two statements.
Statement I: The presence of weaker π-bonds make alkenes less stable than alkanes.
Statement II: The strength of the double bond is greater than that of carbon-carbon single bond.
In the light of the above statements, choose the correct answer from the options given below.

2 L of 0.2 M $H_2SO_4$ is reacted with 2 L of 0.1 M NaOH solution, the molarity of the resulting product $Na_2SO_4$ in the solution is _______ millimolar. (Nearest integer)

Total number of isomers (including stereoisomers) obtained on monochlorination of methylcyclohexane is____.

A 0.5 percent solution of potassium chloride was found to freeze at –0.24°C. The percentage dissociation of potassium chloride is ______. (Nearest integer)
(Molal depression constant for water is 1.80 K kg mol^–1 and
molar mass of KCl is 74.6 g mol^–1)

In neutral or alkaline solution, MnO₄^– oxidises thiosulphateto :

On complete combustion 0.30 g of an organic compound gave 0.20 g of carbon dioxide and 0.10 g of water. The percentage of carbon in the given organic compound is ______. (Nearest Integer)

Given below are two statements:
Statement I: On heating with KHSO₄, glycerol is dehydrated and acrolein is formed.
Statement II: Acrolein has fruity odour and can be used to test glycerol’s presence.
Choose the correct option