List of top Chemistry Questions

Identify 'A' in the following reaction.
A + Acetyl chloride $\xrightarrow[AlCl_3]{anhydrous}$ 2-Chloroacetophenone + 4-Chloroacetophenone}
What is half life of a first order reaction if time required to decrease concentration of reactant from 0.4 M to 0.1 M is $x$ hour?
Identify a side chain (R) group present in Leucine, an amino acid.
Which of the following is NOT a characteristic of chemisorption?
Which from following elements belongs to inner transition elements?
Identify the correct order of acidity of hydrides of 16$^{th}$ group elements from the following.
Calculate the solubility of gas in solvent at 25$^{\circ}$C and 0.8 atm if Henry's law constant for solvent is $6.8 \times 10^{-4}$ moldm$^{-3}$ atm$^{-1}$.
Which from following statements is NOT correct regarding tannins?
Calculate the frequency in Hz of orange colour light having wavelength 600 nm. [C = $3 \times 10^8$ ms$^{-1}$]
Calculate the edge length of unit cell if metal having atomic radius 170 pm forms simple cubic unit cell.
Which among the following is dicarboxylic acid?
Which of the following forces is involved in dinitrogen?
Identify cross linked polymer from following.
Which of the following statements is NOT correct regarding order of reaction?
Identify the reaction so that carbonyl group of aldehydes and ketones is reduced to methylene group on treatment with Zinc-amalgam and concentrated hydrochloric acid.
Identify the correct decreasing order of stability of complexes formed by divalent metal ions with same ligand.
Calculate the osmotic pressure of 0.03 mole of non electrolyte solute dissolved in $0.1\text{dm}^3$ of water at $300 \text{ K}$. $[\text{R} = 0.082\text{dm}^3 \text{ atm mol}^{-1} \text{ K}^{-1}]$}
Calculate the molar mass of an element if it forms fcc unit cell structure [mass of unit cell $= 1.8 \times 10^{-22} \text{ g}$, $\text{N}_\text{A} = 6.022 \times 10^{23} \text{ mol}^{-1}$]
Which among the following compounds has lowest boiling point?
Identify a molecule having highest number of lone pair of electrons in valence shell of central atom.
If salicylic acid ( $138 \text{ u}$ ) reacts with acetic anhydride ( $102 \text{ u}$ ) to from aspirin ( $180 \text{ u}$ ) calculate % atom economy.
Which of the following equations is correct regarding rate of disappearance of reactant and appearance of product for $\text{N}_{2(\text{g})} + 3\text{H}_{2(\text{g})} \longrightarrow 2\text{NH}_{3(\text{g})}$}
Identify the structural formula of phloroglucinol.
Which from following statements is correct regarding a detergent sodium lauryl sulphate?
What is the mass in grams of $0.25 \text{ mol}$ water?