List of top Chemistry Questions

Which of the following periodic properties increases with increasing atomic number within a family in the periodic table?
Calcium chloride is sometimes sprinkled on winter sidewalks to melt snow and ice. If 333g of calcium chloride is dissolved completely in 1.00 kg of water, what will be the freezing point of the solution? (The molal freezing point depression constant for water is 1.86°C kg/mol)
What is the IUPAC name for the following cycloalkane?
Describe the phase change for H$_2$O as pressure is raised at 100°C.
What is the total heat needed to change 1g of water from -10°C to 110°C at 1 atm? \[ \Delta H_{fusion} = 80 \, \text{cal/g}, \Delta H_{vaporisation} = 540 \, \text{cal/g}, \text{specific heat of ice and steam are 0.5 cal/g°C} \]
Which of the following statements is most likely true concerning the given reaction?
2A(g) + B(g) → 2C(g) + D(s)
Immediately, upon bringing a hot piece of metal into a room, the heat is felt from 5 m away. The type of heat transfer is probably
A 13 g gaseous sample of an unknown hydrocarbon occupies a volume of 11.2 L at STP. What is the hydrocarbon?
A 25 mL sample of hard water is titrated with a 0.001 M solution of EDTA, and the end point of the titration is reached at 50 mL of EDTA added. What is the concentration of Ca$^{2+}$ and Mg$^{2+}$ ions in solution?
Toluene reacts with excess of Cl$_2$ in the presence of sunlight to give a product which on hydrolysis followed by reaction with NaOH gives
What type of intermolecular bonding occurs in gaseous CH$_4$?
Which of the following demonstrates non-ideal behaviour of a gas?
Rechargeable batteries have become an essential part of our environmentally conscientious society. The nickel-cadmium cell battery is a rechargeable battery used in small electronic devices. The half reactions that take place in the nickel-cadmium battery during discharge are: Half reaction 1: Cd(OH)$_2$(s) + 2e$^{-}$ → Cd(s) + 2OH$^{-}$ Half reaction 2: 2NiO$_2$(s) + H$_2$O + 2e$^{-}$ → 2Ni(OH)$_2$(s) + 2OH$^{-}$ What is the oxidising agent in the nickel cadmium battery during discharge?
Which of the following is true for an electrolytic cell?
Given the following notation for an electrochemical cell,
Pt(s) $|$ H$_2$(g)$|$ H$^+$(aq) $//$ Ag$^+$(aq)$|$Ag(s)
Which of the following represents the overall balanced (net) cell reaction?
Which of the following would be the most soluble in water?
One mole of an ideal monatomic gas undergoes a process described by the equation $PV^{3}=$ constant. The heat capacity of the gas during this process is -
A plot of ln K against $\frac{1}{T}$ (abscissa) is expected to be a straight line with intercept on ordinate axis equal
Which of the two acids form anhydrides? (I) Oxalic acid (II) Succinic acid (III) Benzoic acid (IV) Phthalic acid
Anisole is treated with HI under two different conditions. $\ce{ C + D [conc.HI] A + B }$ The nature of A to D will be
The wavenumber of the first emission line in the Balmer series of H-Spectrum is: [$R=$ Rydberg constant]
Among the following the incorrect statement is
Which one of the following reactions of xenon compounds is not feasible?
For hydrogen-oxygen fuel cell, the cell reaction is \(2H_2(g)+O_2(g)\rightarrow2H_2O(I)\), If \(\triangle{G}\degree_{f}(H_2O)=-237.2KJmol^{-1}\) then emf ofthis cell is
IUPAC name of valeric acid is