List of top Chemistry Questions asked in KCET

In the electrolytic method of obtaining aluminium from purified bauxite, cryolite is added to the charge in order to :

When $50\, cm ^{3}$ of $0.2\, N$ $H_{2} SO _{4}$ is mixed with $50 cm ^{3}$ of $1 N\, KOH$, the heat liberated is :

Stainless steel does not rust because :

Select the $pK_a$ value of the strongest acid from the following :

The coal tar fraction which contains phenol is :

Which of the following is not an amphoteric substance ?

Temperature coefficient of a reaction is 2. When temperature is increased from 30$^\circ$C to 100$^\circ$C, rate of the reaction increases by

The concentration of electrolyte required to coagulate a given amount of $As_2S_3$ sol. is minimum in the case of :

The volume of water to be added to N/2 HCl to prepare $500 cm^3$ of N/10 solution is

The process by which protein synthesis takes place is based on genetic information is called

For a reaction if $K_p > K_c$ the forward reaction is favoured by (T > 15 K)

Two gas cylinders having same capacity have been filled with 44 g of $4H_2$ and 44 g of $CO_2$ of respectively. If the pressure in $CO_2$ cylinder is 1 atmosphere at a particular temperature pressurein the hydrogen cylinder at the same temperatureis

A signature written with carbon pencil weighs 1 mg. What is the number of carbon atoms present in the signature ?

Heat liberated' when 100 mL of 1 N NaOH isneutralised by 300 mL of 1 N HCl

In a lime kiln, to get higher yield of $CO_2$, the measure that can be taken is

Hesss law states that

Imino acid among these compounds is

Organic acid without a carboxylic acid group is

An ester used as medicine is

Reaction of aniline with benzaldehyde is

Smallest among these species is

Which of the following compounds on boiling with $KMnO_4 $(alk.) and subsequent acidification will not give benzoic acid ?

Grignard reagent is not prepared in aqueous medium but it is prepared in ether medium because

Phenol is treated with bromine water and shaken well to get white precipitate. The white precipitate is

An electron in hydrogen atom makes a transition $n_1 \rightarrow n_2$ where $n_1$, and $n_2$ are principal quantum numbers of the two states. Assuming Bohr?? model to be valid, the time period of the electron in the initial state is eight times that in the final state. The possible