List of top Chemistry Questions

The value of x is maximum for
One mole of an ideal gas at 300 K is expanded isothermally from an initial volume of 1 litre to 10 litres. The Δ E for this process is (R = 2 cal mol⁻¹ K⁻¹):
Beryllium resembles much with :
Which one of the following ions has the highest value of ionic radius?
Which of the following two are isostructural ?
For the reaction : N₂ + 3H₂ 2NH₃. Which one of the following is correct regarding Δ H:
The truth table given below corresponds to the logic gate arrayc|c|c A & B & X
0 & 0 & 1
1 & 0 & 0
0 & 1 & 0
1 & 1 & 0 array
Nuclear energy released in fission since binding energy per nucleon is
A body of length 1 m having cross-sectional area 0.75 m² has heat flow through it at the rate of 600 Joule/sec. Find the temperature difference if K = 200 J m⁻¹K⁻¹.
A liquid is flowing through a non-sectional tube with its axis horizontal. If two points X and Y on the axis of tube have sectional area 2.0 cm² and 25 mm² respectively then find the flow velocity at Y when the flow velocity at X is 10 m/s.
A metallic rod breaks when strain produced is 0.2%. The Young’s modulus of the material of the rod is 7×10⁹ N m⁻². What should be its area of cross-section to support a load of 10⁴ N?
The rotation of the earth having radius R about its axis speeds upto a value such that a man at latitude angle 60^ feels weightless. The duration of the day in such case will be:
Given that A + B = R and A² + B² = R². The angle between A and B is:
In the relation P = (α Z)/(β) e⁻ᵏθ, P is pressure, Z is distance, k is Boltzmann constant and θ is the temperature. The dimensional formula of β will be:
Consider the following reaction:
\[ C_2H_5Cl + AgCN \xrightarrow[\text{EtOH/H}_2O]{} X \;(\text{major}) \]
Which one of the following statements is true for \(X\)?
(I) It gives propionic acid on hydrolysis
(II) It has an ester functional group
(III) It has nitrogen linked to ethyl carbon
(IV) It has a cyanide group
Aluminium reacts with NaOH and forms compound \(X\). If the coordination number of aluminium in \(X\) is \(6\), the correct formula of \(X\) is
How many mL of perhydrol is required to produce sufficient oxygen which can be used to completely convert \(2L\) of \(SO_2\) gas to \(SO_3\) gas?
During the depression in freezing point experiment, an equilibrium is established between the molecules of
The concentration of an organic compound in chloroform is \(6.15\,g\) per \(100\,mL\) of solution. A portion of this solution in a 5 cm polarimeter tube causes an observed rotation of \(-1.2^\circ\). What is the specific rotation of the compound?
Which one of the following is the most effective in the coagulation of an \(As_2S_3\) sol?
An element $ _{x}A^{y} $ emits $ 5 \,\alpha $ and $ 4\,\beta $ particles to give $ _{82}B^{207} $ . The number of protons and neutrons in $ A $ are respectively
For a first order reaction at \(27^\circ C\), ratio of time required for \(75%\) completion to \(25%\) completion of reaction is
The equilibrium constant for the given reaction is \(100\).
\[ N_2(g) + 2O_2(g) \rightleftharpoons 2NO_2(g) \]
What is the equilibrium constant for the reaction given below?
\[ NO_2(g) \rightleftharpoons \frac{1}{2}N_2(g) + O_2(g) \]
\(20\,mL\) of \(0.1\,M\) acetic acid is mixed with \(50\,mL\) of potassium acetate. \(K_a\) of acetic acid \(= 1.8\times 10^{-5}\). At \(27^\circ C\), calculate the concentration of potassium acetate if pH of the mixture is \(4.8\).
The cubic unit cell of a metal (molar mass = \(63.55\,g\,mol^{-1}\)) has an edge length of \(362\,pm\). Its density is \(8.92\,g\,cm^{-3}\). The type of unit cell is