List of top Chemistry Questions

PCC is:

2-Methylpropane can be prepared by Wurtz reaction. The haloalkanes taken along with metallic sodium and dry ether are:

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

The type of linkage present between nucleotides is:

Which one of the following is a cationic detergent?

The number of atoms in 4.5 g of a face-centred cubic crystal with edge length 300 pm is:

$\alpha$-D-(+)-glucose and $\beta$-D-(+)-glucose are:

Identify the incorrect statement from the following:

MnO exhibits:

Which of the following set of polymers are used as fibre?
(i) Teflon
(ii) Starch
(iii) Terylene
(iv) Orlon

Which of the following statements are true about [CoF₆]³⁻ ion?
I) The complex has octahedral geometry.
II) Coordination number of Co is 3 and oxidation state is +6.
(III) The complex is sp³d² hybridised.
(IV) It is a high spin complex.

Which of the following statements related to lanthanoids is incorrect?

A pair of isoelectronic species having a bond order of one is:

In the analysis of III group basic radicals of salts, the purpose of adding NH₄Cl (solid) to NH₄OH is:

Which one of the following properties is generally not applicable to ionic hydrides?

0.48 g of an organic compound on complete combustion produced 0.22 g of CO₂. The percentage of C in the given organic compound is:

For the reaction PCl5​→PCl3​+Cl2​, the rate and rate constant are 1.02×10−4mol L−1s−1 and 3.4×10−5s−1, respectively, at a given instant. The molar concentration of PCl5​ at that instant is:

Identify the wrong relation for real gases:

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

The energy associated with the first orbit of He+ is:

When a tertiary alcohol ($C_4​H_{10}​O$) reacts with 20% $H_3​PO_4$​ at 358 K, it gives a compound ($C_4​H_8​$) as the major product. The IUPAC name of this compound is:

8.8 g of monohydric alcohol reacts with ethyl magnesium iodide, releasing 2240 $cm^3$ of ethane at STP. This monohydric alcohol forms a carbonyl compound that answers Tollen’s test. The alcohol is:

From the diagram

\( \Delta H \) for the reaction C → A is: