List of top Chemistry Questions asked in KEAM

Benzene diazonium salt in the presence of Cu/HBr will give bromobenzene (C\(_6\)H\(_5\)Br) and release nitrogen gas (N\(_2\)). This reaction is known as:

Which aldehyde does not give Fehling test?

What is the name of the element which is known as Eka-Aluminium?

2-methyl propene is obtained as product when sodium methoxide reacts with

Find the alkene which gives 2 mol of acetone by ozonolysis.

When CO is reacted with \( H_2 \) at 573 K, methanol is formed. Which is the catalyst used in this process?

Which of the following is used to convert sodium chromate to sodium dichromate in the preparation of potassium dichromate?

Two solutions that are isotonic have same ......

Which of the following series in hydrogen spectrum corresponds to UV radiation?

Which of these have the least bond length (in pm)?

First element in 3d series which shows +2, +3, +4, +6 oxidation state

Increasing order of metallic character

Relationship between \( t_{90} \) and \( t_{99} \) for a first order reaction:

Which of the following has a planar structure with two lone pairs?

Which of the following statements regarding the structure of CO\(_2\) is correct?

Enthalpy of formation of \( \text{C}_6\text{H}_6 \), \( \text{CO}_2(g) \) and \( \text{H}_2\text{O}(l) \) are -393.5, -285.8 and +48.5 KJ/mol respectively. Find the enthalpy of combustion of \( \text{C}_6\text{H}_6 \):

Which of the following is allylic alcohol?

Lactose is composed of:

Which of the following has highest pKa value?

Ratio of between the maximum wavelength of Lyman and Balmer series.

The \( K_c \) of the reaction \[ \text{NH}_3(g) + \text{O}_2(g) \rightleftharpoons 2\text{NO}(g) \] at 1500 K is 0.1. What is the concentration of NO, when the initial concentration of \( \text{N}_2 \) and \( \text{O}_2 \) is 0.04 mol?

If ‘m’ is the molality, ‘M’ is the molarity, ‘d’ is the density in g/cm\(^3\) and ‘M\(_2\)’ is the molarity of solute. What is the relation between them?

Which reagent gives as major product from phenol

Hinsberg reagent is

Energy of \(2h\nu_0\) fall on a metal of work function \(h\nu_0\) cause velocity of \(v_1\), when \(5h\nu_0\) fall velocity ratio of \(v_1/v_2\)