List of top Chemistry Questions asked in KEAM

Some enzyme catalysed reactions which occur at metal surfaces are:
Thermal decomposition of a compound X follows first order kinetics. The initial concentration of X is 2 mol L\(^{-1}\). It decreased to 0.125 mol L\(^{-1}\) in one hour at 400K. What is the half-life period of the reaction at 400K? (log 2 = 0.3010)
The observed molecular weight of a 1:1 strong electrolyte is 117 g mol\(^{-1}\) as determined by the depression of freezing point method. Its theoretical molecular weight is 60 g mol\(^{-1}\). The percentage dissociation of the electrolyte is:
Which of the following aqueous mixture is a buffer solution?
Which of the following molecule has the highest dipole moment?
Which of the following isoelectronic species has the smallest radius?
The number of angular and radial nodes present in '4d' orbitals are respectively:
What is the mass of water formed when 1.6 g of methane gas is completely burnt in excess oxygen?
The correct electronic configuration of Tc (Z = 43) is:
What is the mass of crystalline oxalic acid (molar mass = 126 g/mol) present in 50 mL of 0.02N aqueous oxalic acid solution?
Lactose is composed of:
Which of the following is used as an insect attractant?
The reagent used for the conversion of but-2-ene to ethanol is:
The major products formed when one mole of \( \text{CH}_3\text{CH}_2\text{CH}(\text{CH}_3)\text{CH}_2\text{OCH}_2\text{CH}_3 \) is treated with one mole of HI are:
A tertiary alkyl halide (X), C\(_4\)H\(_9\)Br, reacted with alc.KOH to give compound (Y). Compound (Y) reacted with HBr in presence of peroxide to give compound (Z). The compounds (Y) and (Z) are respectively:
One mole of an alkene on ozonolysis gives a mixture of one mole pentan-3-one and one mole methanal. The alkene is:
The number of unpaired electrons in \([CoF_6]^{3-}\) is:

The decreasing order of stability of the following carbocations is: 
\( (i) \text{(CH}_3\text{)}_3\text{C}^+ \quad (ii) \text{(CH}_3\text{)}_2\text{C-CH}_2^+ \quad (iii) \text{CH}_3\text{CH}_2\text{-CH}_2^+ \)

The increasing order of acid strength of the following carboxylic acids is: 
\[ (i) \text{(CH}_3\text{)}_3\text{C-COOH} \quad (ii) \text{(CH}_3\text{)}_2\text{CH-COOH} \quad (iii) \text{CH}_3\text{CH}_2\text{COOH} \]

Which of the following is used in the treatment of lead poisoning?
The reaction, \( 2I^- + S_2O_8^{2-} \rightarrow I_2 + 2SO_4^{2-} \), is catalysed by:
The increasing order of field strength of ligands in the spectrochemical series is:
The type of d-d transition of the electron occurs in \([Ti(H_2O)_6]^{3+}\) is:
A coordination compound of cobalt acts as an antipericious anemia factor is:
Which of the following mixture forms azeotrope?