List of top Chemistry Questions

The compound formed on heating chlorobenzene with chloral in the presence concentrated sulphuric acid is

The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is

The compound having only primary hydrogen atoms is

The $ BC{{l}_{3}} $ is a planar molecule whereas $ NC{{l}_{3}} $ is pyramidal, because:

The average osmotic pressure of human blood is $7.8$ bar at $37^{\circ}\, C$. What is the concentration of an aqueous $NaCl$ solution that could be used in the blood stream?

Which of the following give ammonia, on heating with NaOH?

Thomas slag is:

The amount of $ {{\text{H}}_{\text{2}}}\text{S}\text{.} $ required to precipitate $ \text{1}\text{.69 g BaS} $ from $ \text{BaC}{{\text{l}}_{\text{2}}} $ solution is:

Which of the following Statements, about zero order reaction is not true?

Representative elements are

''The addition of unsymmetrical reagents to unsymmetrical alkenes occurs in such a way that the negative part of the addendum goes to that carbon atom of the double bond which carries lesser number of hydrogen atoms'' is called by :

The molecule of $CO _{2}$ has angle $180^{\circ}$. It can be explained on the basis of :

Bessemer converter is used for the preparation of:

Which of the following oxides of nitrogen is solid?

$Mg$ and $Li$ are similar in their properties due to:

One mole of magnesium nitride on the reaction with excess of water gives

Number of lone pair(s') in $XeOF_4$ is/are

Calculate $\Delta G^{o}$ for conversion of oxygen? To ozone $3 / 2 O _{2}(g) \rightarrow O _{3}(g)$ at $298 \,K$, if $K_{p}$ for this conversion is $2.47 \times 10^{-29}$ :

The structural formula of indigo dye is :

Lattice energy is calculated by :

Which of the following is correct?

The enthalpy change for the reaction of $50.00\, mL$ of ethylene with $50.00\, mL$ of $H_2 $ at $1.5\, atm$ pressure is $\Delta H=-0.31\, kJ$. The value of $\Delta E$ will be:

In a cell that utilises the reaction $ {Zn(s) + 2H+ (aq) -> Zn2+(aq) + H2(g)}$ addition of $H_2SO_4$ to cathode compartment, will

Identify the correct statements regarding enzymes

How much energy is released when 6 moles of octane is burnt in air ? Given $\Delta H_{f}{ }^{\circ}$ for $CO _{2}(g), H _{2} O (g)$ and $C _{8} H _{18}(l)$ respectively are $-490,-240$ and $+160\, J / mol :$