List of top Chemistry Questions

In the compounds $KMnO_{4}$ and $K_{2}Cr_{2}O_{7},$ the highest oxidation state is of the element:

$ C_6H_5 - CH = CHCHO {->[X]} C_6H_5CH = CHCH_2OH$ In the above sequence $X$ can be:

Among $ HF,CH_{4},CH_{3}OH$ and $N_{2}O_{4},$ inter molecular hydrogen bond is expected:

Maximum number of hydrogen bonding in $ {{H}_{2}}O $ is:

Which of the following acts as an oxidising as well as reducing agent?

What is the oxidation state of $P$ in $ Ba(H_2PO_2)_2 $?

What is obtained when chlorine is passed in boiling toluene and product is hydrolysed?

Maximum entropy will be in which of the following?

Sodium phenoxide reacts with $ C{{O}_{2}} $ at $400 \,K$ and $4-7$ atm pressure to give

Saturated solution of $ KN{{O}_{3}} $ is used to make salt bridge because

On passing $3A$ of electricity for $50$ min $1.8\, g$ metal deposits. The equivalent mass of metal is

Which of the following is used widely in the manufacture of lead storage battery?

The general formula $ {{C}_{n}}{{H}_{2n}}{{O}_{2}} $ could be for open chain

Decomposition of hydrogen peroxide can be prevented by adding

Which of the following is an intensive property ?

The enthalpies of combustion of carbon and carbon monoxide are $ -393.5$ and $ -283\,kJ\, mol^{-1}$ respectively. The enthalpy of formation of carbon monoxide per mole is

Ammonia gas dissolves in water to form $ NH_{4}OH$ . In this reaction water acts as

The structure of $PF_{5}$ molecule is

A solid is made of two elements $X$ and $Z$. The atoms $Z$ are in $CCP$ arrangement while the atoms $X$ occupy all the tetrahedral sites. What is the formula of the compound?

During the evaporation of liquid

Which of the following statements is correct? Dielectric constant of $ {{H}_{2}}{{O}_{2}} $

For the square planar complex $[M(a)(b)(c)(d)]$ (where, $M =$ central metal and $a, b, c$ and $d$ are monodentate ligands), the number of possible geometrical isomers are

The discovery of which of the following group of elements gave death blow to the Newland's law of octaves?

The electronic configuration of a dipositive ion $ {{M}^{2+}} $ is $2, 8, 14$ and its mass number is $56$. The number of neutrons present is

The heat of formation of $ C{{O}_{2}} $ is $ -95\text{ }kcal $ . The amount of carbon which on burning will evolve 1000 kcal is