List of top Chemistry Questions

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?
Which from following is an essential amino acid?
Calculate the concentration of dissolved gas in water at $25^\circ\text{C}$ if partial pressure of gas at same temperature is 0.15 atm . $[\text{K}_\text{H} = 0.15 \text{ moldm}^{-3} \text{atm}^{-1}]$}
Calculate the total number of tetrahedral and octahedral voids formed in 0.6 mol of a compound if it forms hcp structure.
What is the number of unpaired electrons in Ti in +3 state?
Identify thermoplastic polymer from following.
The rate constant for the reaction, $2\text{N}_2\text{O}_{5(\text{g})} \longrightarrow 2\text{N}_2\text{O}_{4(\text{g})} + \text{O}_{2(\text{g})}$ is $4.98 \times 10^{-4} \text{ s}^{-1}$ . What is the order of reaction?
Which of the following is not negatively charged sol?
Which of the following set of elements is present in apatite?
Identify the geometry of $\text{TeF}_4$ molecule from the following.
What is the pH of buffer solution formed by mixing 0.01 M acetic acid and 0.05 M sodium acetate? $(\text{pK}_\text{a} = 4.7447)$
Calculate the energy associated with third orbit of $\text{He}^+$.
Which of the following solutions exhibits highest freezing point depression?
Which from following formulae is used to obtain value of $\text{E}^\circ_{\text{cell}}$ for a reaction taking place in Dry cell?
Which from following is a lanthanoid element?
Identify the type of defect from following in stainless steel.
If compressibility factor of real gas is 1.05 at STP. What is molar volume of real gas?