List of top Chemistry Questions

Anisole reacts with concentrated H\(_2\)SO\(_4\) and HNO\(_3\) to yield a mixture of \(\underline{\hspace{2cm}}\)
The colour of Ni\(^{2+}\) is \(\underline{\hspace{2cm}}\)
Methyl amine is \(\underline{\hspace{2cm}}\) and \(\underline{\hspace{2cm}}\) basic than ammonia.
Molarity of water is \(\underline{\hspace{2cm}}\)
Alkyl iodides are often prepared by the reaction of alkyl chloride/bromides with NaI in dry acetone. This reaction is known as:
Alcohols react with sodium to form:
Order of reaction for rate = \( K[A]^{1/2} [B]^{3/2} \) is:
Inner transition element is:
Formula of Osmotic pressure is:

The effect of addition of helium gas to the following reaction in equilibrium state, is : \(PCl _5( g ) \rightleftharpoons PCl _3( g )+ Cl _2( g )\)

In Clemmensen reduction, carbonyl compounds are treated with:
The product(s) formed when diborane (\( B_2H_6 \)) is hydrolyzed is/are:
Arrange the following in increasing order of ionic radii: \( C^{4-}, N^{3-}, F^{-}, O^{2-} \).
An element X has a body-centred cubic (bcc) structure with a cell edge of 200 pm. The density of the element is 5 g cm\(^{-3}\). The number of atoms present in 300g of the element X is:
Given: Avogadro Constant, \( N_A = 6.0 \times 10^{23} \) mol\(^{-1} \).
The rate law for a reaction between the substances A and B is given by: \[ {Rate} = k[A]^m[B]^n \] On doubling the concentration of A and halving the concentration of B, the ratio of the new rate to the earlier rate of the reaction will be:

Values of dissociation constant \( K_a \) are given as follows: 
 

Correct order of increasing base strength of the conjugate bases \( {CN}^-, {F}^- \) and \( {NO}_2^- \) is: 
 

The geometry and magnetic behaviour of the complex \([Ni(CO)_4]\) are:

The major product of the following reaction is: 

\( XeO_4 \) molecule is tetrahedral having:
What is the correct order of reactivity of alcohols in the following reaction?
$$ R - OH + HCl \rightarrow R - Cl + H_2O $$ 
Which property of white phosphorus is common to red phosphorus?
In a reaction, the threshold energy is equal to:
The Allyl cyanide molecule contains:
In which case does the change in entropy (\( \Delta S \)) become negative?

For the below-given cyclic hemiacetal (X), the correct pyranose structure is: