List of top Chemistry Questions

0.592 g of copper is deposited in 60 minutes by passing 0.5 amperes current through a solution of copper (II) sulphate. The electro chemical equivalent of copper (II) in g/C is:
Which of the following sets of oxides are correctly matched?
If \(n\) and \(l\) represent the principal and azimuthal quantum numbers respectively, the formula used to know the number of radial nodes possible for a given orbital is:
The correct order of reducing power of alkali metals in aqueous solution is
Which of the following sequence of reagents converts benzoic acid to benzaldehyde?
At 300 K, aqueous KCl and aqueous K$_2$SO$_4$ solutions were electrolyzed separately using Pt electrodes. The gases liberated at cathodes in these two electrolytic processes are respectively:
The number of molecules with electrophilic centres in the following is CH\(_3\)CH\(_2\)Br, CH\(_3\)COCH\(_3\), CH\(_3\)CH\(_2\)CN, (CH\(_3\))\(_2\)Cd

What are X and Y respectively in the following reactions? 

The first ionization enthalpies of the elements X, Y, Z of the second period are 899, 1402, 520 kJ/mol respectively. X, Y, Z respectively are:

In the following reaction sequence, what are X and Y respectively? 

Identify the number of molecules having permanent dipole moment from the following: $$ CCl_4, NF_3, H_2S, HBr, SF_4, SiF_4, XeF_4, BeCl_2, SnCl_2, BrF_5, SO_2 $$
Identify the correct statements from the following:
I. \(\text{In}_2\text{O}_3\) is a basic oxide.
II. \(\text{TiCl}_2\) is more ionic in nature than \(\text{TiCl}_3\).
III. Boron reacts with dinitrogen at high temperature to form BN.
At 300 K, 3.0 moles of an ideal gas at 3.0 atm pressure is compressed isothermally to one half of its volume by an external pressure of 6.0 atm. The work done (in kJ) is:
Identify the pair of hydrides which have polymeric structure:

Which one of the following complex ions has geometrical isomers?

Option 1: \(\left[\text{Co}(\text{Cl})_2(\text{en})_2\right]^+\)

Option 2: \(\left[\text{Cr}(\text{NH}_3)_4(\text{en})\right]^{3+}\)

Option 3: \(\left[\text{Co}(\text{en})_3\right]^{3+}\)

Option 4: \(\left[\text{Ni}(\text{NH}_3)_5\right]\text{Br}\)

X and Z respectively in the following reaction sequence are: \[ C_3H_6 \xrightarrow{X} Y \xrightarrow{C_6H_6/AlCl_3} Z \]
The molecular formula of a crystal is \( AB_2O_4 \). Oxygen atoms form a close-packed lattice. Atoms of A occupy \( x\% \) of tetrahedral voids and atoms of B occupy \( y\% \) of octahedral voids. \( x \) and \( y \) are respectively: \flushleft
At T(K), \(K_c\) for the reaction AO\(_2\)(g) + BO\(_2\)(g) \(\rightleftharpoons\) AO\(_3\)(g) + BO(g) is 16. One mole each of reactants and products are taken in a 1L flask and heated to T(K), and equilibrium is established. What is the equilibrium concentration of BO (in mol L\(^{-1}\))?
Identify the pair in which the difference in bond order value is maximum.
In which of the following species, the ratio of s-electrons to p-electrons is the same?

Conversion of X to Y in the given reaction corresponds to:

Arrange the following in increasing order of their crystal field splitting energy: 

The effects that aspirin can produce in the body are: 

 
 

What is the percentage of carbon in the product ‘X’ formed in the following reaction?

Which of the following statements are correct?

i) \( CCl_4 \) undergoes hydrolysis easily.
(ii) Diamond has directional covalent bonds.
(iii)Fullerene is the thermodynamically most stable allotrope of carbon.
(iv)Glass is a man-made silicate.