List of top Chemistry Questions asked in KCET

On treating 100 rnL of 0.1 M aqueous solution of the complex CrCl₃.6H₂O with excess of AgNO₃,2.86 g of AgCl was obtained. The complex is :

When a tertiary alcohol ‘A’ (C₄H₁₀O₄) reacts with 20% H₃PO₄ at 358 K, it gives a compound ‘B’ (C₄H₈) as a major product. The IUPAC name of the compound ‘B’ is :

The synthetically produced radioactive noble gas by the collision of \(_{98}^{249}Cf\) with \(^{48}_{20}Ca\) is

For the reaction, A⇌B, E_a = 50kJ mol^-1 and ΔH = -20 kJ mol^-1. When a catalyst is added, E_a decreases by 10kJmol^-1. What is the E_a for the backward reaction in the presence of catalyst?

The number of atoms in 4.5 g of a face-centred cubic crystal with edge length 300 pm is :
(Given density=10gcm^-3 and N_A=6.022×10²³).

In the analysis of III group basic radicals of salts, the purpose of adding NH₄CI_(s), to NH₄OH is:

The energy associated with first orbit is He⁺ is

Which one of the following is a cationic detergent ?

But-1-yne on reaction with dil. \(H_2SO_4\) in presence of \(Hg^{2+}\) ions at 333 K gives :

The correct decreasing order of boiling point of hydrogen halides is

Select the correct statement :

The incorrect statement about Hall-Heroult process is :

For the coagulation of positively charged hydrated ferric-oxide sol, the flocculating power of the ions is in the order :

Identify the wrong relation for real gases

The transition element ( ≈ 5%) present with lanthanoid metal in Misch metal is:

A pair of isoelectric species having bond order of one is:

From the diagram

Δ_rH for the reaction C → A is

Match the following:

I.	Zn2+	i.	d8 configuration
II.	Cu2+	ii.	colourless
III.	Ni2-	iii.	μ=1.73BM

Which of the following statements related to lanthanoids is incorreect?

For which one of the following mixtures is composition uniform throughout?

For the reaction PCI₅ → PCI₃ + Cl₂, rate and rate constant are 1.02×10^-4 mol L^-1s^-1 and 3.4×10^-5s^-1 respectively at a given instant. The molar concentration of PCI₅, at that instant is:

Which one of the following does not represent Arrhenius equation?

Identify the incorrect statement :

A metalloid is

How many Coulombs are required to oxidise 0.1 mole of H₂O to oxygen?