List of top Chemistry Questions

The most basic hydroxide from following is
Which among the following equations represents the first law of thermodynamics under isobaric conditions ?
Identify the product 'C' in the following reaction. $\ce{Aniline ->[(CH_3 CO)_2 O][Pyridine] A ->[Br_2][CH_3COOH] B ->[H^{+} or \, OH^{-}] C }$
Molarity is
During galvanization of iron, which metal is used for coating iron surface ?
The $ EAN $ value $ y \left[Ti\left(\sigma-C_{6}H_{5}\right)_{2}\left(\pi-C_{5}H_{5}\right)_{2}\right]^{0} $ is
What is the hybridization and geometry of the compound $ XeOF_4 $ ?
Trien is
The $E _{\text {red }}^{\circ}$ of $Ag,\, Cu ,\, Co$ and $Zn$ are $0.799$ $0.337,-0.277$ and $-0.762\, V$ respectively, which of the following cells will have maximum cell emf?
Which is used for sterilization of water in water supply system of cities?

fe3+ is reduced to fe2+ by using

Electrolytic refining is used to purify which of the following metals ?
What will be the $ E_{cell} $ for the given cell ? $ Zn\left|Zn^{2+}\left(0.1\,M\right)\right|\left|Cu^{2+}\left(0.01\,M\right)\right|Cu $ Given : $ E^{\circ}_{Zn^{2+}Zn}=0.76\,V $ and $ E^{\circ}_{Cu^{2+}Cu}=0.34\,V $ . Also predict whether the reaction is spontaneous or non-spontaneous.
The standard emf of the cell $ (E^{\circ}_{cell} $ and equilibrium constant $ (K_{eq}) $ of the following reaction of $ 298\, K $ $ Cd^{2+} + 4NH_{3} {\rightleftharpoons} Cd (NH_{3})^{2+}_{4} $
What is Tg for polymer?
In the reaction NaOH (hot and conc.) + Cl $\to$ NaCl + NaClO Change in oxidation state of Cl is :
Which of the following does not depend on the attraction of the bonding pair towards the nucleus.
What is the maximum wavelength of line of Balmer series of hydrogen spectrum? (R = 1.09 ??10 m)
Solution with similar osmotic pressure are called?
If $ \chi_{1} $ and $ \chi_{2} $ represent the mole fractions of a component $ A $ in the vapour phase and liquid mixture respectively, and $ p^{\circ}_{A} $ and $ p^{\circ}_{B} $ represent vapour pres sines of pure A and pure B, then total vapour pressure of liquid mixture is
1 g of polymer having molar mass 1,60,000 g is dissolved in 800 mL water. Calculate the osmotic pressure in pascal at 27$^{\circ}$C. $(R \,= \,8.314\, J \,K^{-1}mole^{-1})$
The vapour pressure of a liquid decreases if some non-volatile solute is dissolved in it. The relative lowering of vapour pressure of a solution containing a non-volatile solute is equal to the mole fraction of the solute in the solution.
Ethylene glycol is used as antifreeze to reduce freezing point of water to $-2.4^{\circ}\,C$. What mass of antifreeze is required for $2\, L$ water? $(K_f \,water\, = \,1.86\, K \,kg/mole)$
When pressure is increased at constant temperature
In activation energy for a simple Chemical reaction $A \to B$ is $E_{a}$ in forward direction. The activation energy for reverse reaction