List of top Chemistry Questions

Name the complex Ni(PF)

If pH of a solution is 4, then $ {{\text{H}}^{\text{+}}} $ is:

If a mixture of $CO$ and $N_{2}$ in equal amount have total $1 \,atm $pressure, then partial pressure of $N_{2}$ in the mixture is

Which of the following pairs constitutes a buffer?

Which one of the following has unit positive charge and $1$ amu mass?

In which of the following complex ion, the central metal ion is in a state of $sp^3d^2$ hybridisation ?

The increase of pressure on ice ? water at a constant temperature will cause

The order of the reaction $N_2O_5 \, \rightarrow \, N_2O_4(g) + \frac{1}{2}O_2(g)$ is

Schottky defect in solids is due to

Among the following, the species having square planar geometry for central atom are: (i) $XeF _{4}$ (ii) $SF _{4}$ (iii) $\left[ NiCl _{4}\right]^{2-}$ (iv) $\left[ PtCl _{4}\right]^{2-}$

A reaction was found to be second order with respect to the concentration of carbon monoxide. If the concentration of carbon monoxide is doubled, with everything else kept the same, the rate of reaction will:

The reaction ${B(OH)_3 + NaOH <=> Na[B(OH)_4]}$ $ { B(OH)_3 + NaOH <=> NaBO_2 + 2 \, H_2O}$ can be made to proceed to forward direction by the addition of

Which of the following can give a Grignard reagent when reacted with magnesium m dry ether?

Match the following lists:

The bond angle in $ \text{As}{{\text{H}}_{\text{3}}} $ is greater than that in:

Acidified $ \text{KMn}{{\text{O}}_{\text{4}}} $ oxidises oxalic acid to $ \text{C}{{\text{O}}_{2}}. $ What is the volume (in litres) of $ {{10}^{-4}}\text{M}\,\text{KMn}{{\text{O}}_{\text{4}}} $ required to completely oxidise 0.5 L of $ {{10}^{-2}}\text{M} $ oxalic acid in acid medium?

What is X in the following reaction? $ KHS{{O}_{4}}+{{F}_{2}}\xrightarrow{{}}HF+X $

For the reaction $CH_{4}(g)+2O_2(g) {<=>}CO_2(g)+2H_2O(\ell) \Delta H_{r} =-170.8\,KJ\,mol^{-1}$ Which of the following statements is not true:

Which one of the following orders is not in accordance with the property stated against it?

The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number 16 is :-

The correct order of the mobility of the alkali metal ions in aqueous solution is

The correct order regarding the electronegativity of hybrid orbitals of carbon is

6 moles of an ideal gas expand isothermally and reversibly from a volume of 1 litre to a volume of 10 litres at 27?C. What is the maximum work done?

$[NH(CH_2)NHCO(CH_2)_4CO]_{n}$ is a:-

Addition of $ SnC{{l}_{2}} $ to $ HgCl_2$ gives precipitate: