List of top Chemistry Questions asked in BITSAT

The conductivity of a weak acid HA of concentration 0.001 mol L\(^{-1}\) is \( 2.0 \times 10^{-5} \, \text{S cm}^{-1} \). If \( \Lambda_m^\circ ({HA}) = 190 \, \text{S cm}^2 \text{mol}^{-1} \), the ionization constant (\( K_a \)) of HA is equal to _______ \( \times 10^{-6} \).
The helical structure of a protein is stabilized by:
Which one of the following molecular hydrides acts as a Lewis acid?
In the laboratory, manganese (II) salt is oxidized to permanganate ion in aqueous solution by:
If enthalpies of formation of \( {C}_2{H}_4(g) \), \( {CO}_2(g) \) and \( {H}_2{O}(l) \) at 25°C and 1 atm pressure are 52, 394 and -286 kJ/mol respectively, the change in enthalpy for combustion of \( {C}_2{H}_4 \) is equal to:
Which named reaction contains dichlorocarbene intermediate?
Which of the following will precipitate first when an aqueous solution containing sulphate ions is added?
Among the ligands \( {NH}_3, \, {en}, \, {CN}^-, \, {CO} \), the correct order of their increasing field strength is:
Which of the following pairs will form the most stable ionic bond?

Among the given halides, which one will give the same product in both S\(_N1\) and S\(_N2\) reactions? 

The probability density plots of 1s and 2s orbitals are given in figure. 

 

The density of dots in a region represents the probability density of finding electrons in the region. On the basis of the above diagram, which of the following statements is incorrect?

The drug used as an antidepressant is:
Find out compound B in the given reaction sequence: \[ {C}_6{H}_6 + {CH}_3X \xrightarrow{{AlCl}_3} A \xrightarrow{{CrO}_3 { in } (CH_3CO)_2O / H_3O^+} B \]
The photochemical smog does not generally contain:
Which method is useful for the synthesis of ether?
Melamine plastic crockery is a copolymer of:
The \( {S} - {S} \) bond is not present in:

How much ethyl alcohol must be added to 1 litre of water so that the solution will freeze at \(-14^\circ \text{C}\)? 

(Kf for water = 1.86 °C/mol)

NaOH is deliquescent

The freezing point of the 0.05 molal solution of non - electrolyte in water is? (kf = 1.86)
Oxidation state of S in H2S03 and H2S08
Which substance is used in column Chromatography?
How many elements are there in period 4 of the periodic table?

Order of polarity of HCL CO2 H20 HF

The electrons in the atom of an element which determine its chemical and electrical properties are called?