List of top Chemistry Questions asked in KEAM

First element in 3d series which shows +2, +3, +4, +6 oxidation state
Increasing order of metallic character
Which of the following has a planar structure with two lone pairs?
Which of the following is allylic alcohol?
Relationship between \( t_{90} \) and \( t_{99} \) for a first order reaction:
Lactose is composed of:
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 statements regarding the structure of CO\(_2\) is correct?
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?
Hinsberg reagent is
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?
Which of the following has highest pKa value?
Which reagent gives as major product from phenol
Ratio of between the maximum wavelength of Lyman and Balmer series.
Which 3d series of element has least enthalpy of atomization?
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 \(v_1/v_2\)
There is 40 % C, 67% H2, find the empirical formula
Which of the following have minimum and maximum threshold energy K, Na, Mg, Li?
Number of C−C, C−H, C=C in But-2-ene-1-yne respectively
P\(_4\) \(\rightarrow\) PH\(_3\) + H\(_2\)PO\(_2\)
Oxidation state of phosphorus change from -------- to -------- respectively.
The isomerism shown by the following compound: \[ [\text{Co}(CN)_6][\text{Cr}(NH_3)_6] \quad [\text{Co}(CN)_6][\text{Cr}(NH_3)_6] \]
IUPAC name of Element number 105?
What is 1-chlorocyclohexene?
What is the IUPAC name of Mesityl oxide?
Decreasing order basic strength