List of top Chemistry Questions asked in KCET

In blast furnace iron oxide is reduced by

A buffer solution has equal volumes of $0.2M \, NH_4OH$ and $0.02\, M \, NH_4 Cl$. The $p^{kb}$ of the base is $5$. The $pH$ is

A radioactive isotope has a half life of $10$ days. If today $125$ mg is left over, what was its original weight $40$ days earlier ?

Alum is a water purifier because it

Ethyl chloride on heating with $AgCN$, forms a compound $'X'$ . The functional isomer of $'X'$ is -

Which of the following pairs of elements cannot form an alloy ?

Which of these does not influence the rate of reaction?

Which compound is zero valent metal complex ?

Sucrose molecule is made up of

$15 $ moles of $H_2$ and $5.2$ moles of $I_2$ are mixed and allowed to attain equilibrium at $500^\circ$C. At equilibrium, the concentration of $HI$ is found to be $10$ moles. The equilibrium constant for the formation of $HI$ is

Molarity of $0.2 \, NH_2SO_4$ is

An atom of an element $A$ has three electrons in its outermost orbit and that of $B$ has six electrons in its outermost orbit. The formula of the compound between these two will be

An emulsifier is a substance which

2 - Acetoxy benzoic acid is used as an :

When a mixture of methane and oxygen is passed through heated molybdenum oxide, the main product formed is :

The reaction,$2SO_{2(g)} + O_{2(g)} \leftrightharpoons 2SO_{3(g)}$ is carried out in a $1\, dm^3$ vessel and $2 \,dm^3$ vessel separately. The ratio of the reaction velocities will be :

The chemical equilibrium of a reversible reaction is not influenced by :

The metal which does not form ammonium nitrate by reaction with dilute nitric acid is :

In a galvanic cell, the electrons flow from :

In a mixture of acetic acid and sodium acetate the ratio of concentrations of the salt to the acid is increased ten times. Then the pH of the solution :

Benzoin is :

A nitrogen containing organic compound gave an oily liquid on heating with bromine and potassium hydroxide solution. On shaking the product with acetic anhydride, an antipyretic drug was obtained. The reactions indicate that the starting compound is :

Identify the gas which is readily adsorbed by activated charcoal

In the manufacture of ammonia by the Haber's process, ${N_{2(g)} +3H_{2(g)} <=> 2NH_{3(g)} + 92.3 kJ} $, which of the following conditions is unfavourable ?

Aluminium displaces hydrogen from dilute HCl whereas silver does not. The E.M.F. of a cell prepared by combining $Al /Al^{+3}$ and $Ag/Ag^{+}$ is $2.46\, V.$ The reduction potential of silver electrode is $+ 0.80\, V$. The reduction potential of aluminium electrode is :