List of top Chemistry Questions

For the following reaction, the relation between \( \Delta H \) and \( \Delta U \) is
\[ \text{2SO}_3(\text{g}) + \text{O}_2(\text{g}) \rightarrow \text{2SO}_3(\text{g}) \]
Which among the following compounds is treated with benzonitrile to obtain benzophenone in dry ether and then acid hydrolysis?
Which among the following group -15 elements forms hydrogen bonding in its hydride compounds?
An element crystallizes in bcc type of unit cell having atomic radius \( 1.33 \times 10^{-8} \) cm, the edge length of unit cell will be
Which polymer is obtained from monomers 3-Hydroxy butanoic acid and 3-Hydroxy pentanoic acid?
0.5 molal aqueous solution of a weak acid (HX) is 20% ionised. If Kf of water is 1.86 K kg mol⁻¹, the lowering in freezing point of solution is
An element crystallizes in bcc type of unit cell, the density and edge length of unit cell is 4 g cm\(^{-3}\) and 500 pm respectively. What is the atomic mass of an element?
What is the number of moles and total number of atoms respectively present in 5.6 cm\(^3\) of ammonia gas at STP?
In aqueous phase the order of basic strength of alkylamine is
Identify product ‘A’ in the following reaction.
\[ \text{R - C} \equiv \text{N} \xrightarrow{\text{DIBAL-H}} \xrightarrow{\text{H}_3\text{O}^+} A \]
Identify the mineral of aluminium from following.
Identify the compound A and B in the following reaction.
\[ \text{CH}_3\text{Cl} + \text{KCN (alc)} \xrightarrow{\Delta} A + 2\text{H}_2\text{O} + \text{HCl} \rightarrow B + \text{NH}_4\text{Cl} \]
Which of the following phenols is isolated from defensive secretion of grasshopper species?
Identify the formula of potassium trioxalato aluminate (III).
In an isothermal and reversible process, \(1.6 \times 10^{-2}\) kg O\(_2\) expands from 10 dm\(^3\) to 100 dm\(^3\) at 300 K, work done in the process is (R = 8.314 J/mol·K)
Which following pair of elements does NOT represent chemical twins?
Sulphapyridine is a/an
Electrophoresis is used .......
Which among the following is used as a fumigant pesticide for strawberries?
What is the molecular formula of glyceraldehyde?
Mole fraction of solute in its 2 molal aqueous solution is
Which among the following complexes is a homoleptic and cationic in nature?
The H-N-H bond angle in NH\(_3\) molecule is
In which of the following molecules, 2\(\pi\) bonds are present?
Which from the following compounds does NOT contain phantom atom?