List of top Chemistry Questions asked in AP EAPCET

0.5g of non-volatile solute is added to 39g of Benzene. Then vapor pressure of solution is (vapor pressure of pure Benzene is 0.850 torr)
Which one of the following is not correct regarding diamond?
Identify correctly matched pairs
I. Boron fibres - bullet proof vest
II. Metal borides - nuclear industry
III. Borax - flux in soldering
When burnt in air the metal 'X' forms only oxide, where as metal 'Y' forms oxide and nitride. X, Y respectively are
Among the following, the method used for removal of temporary hardness of water is
The electrophile involved in sulphonation of benzene is
At 298 K, $ K_{\text{sp}} $ of Cu(OH)₂ is $ 2.2 \times 10^{-20} $. What is its solubility in $ 10^{-7} \, \text{M} \, \text{CuCl}_2 $ solution?
One mole of aqueous $ \text{SO}_3^{2-} $ is completely reacted with 2 moles of $ \text{Br}_2 (l) $. What is the oxidation state (s) of S in the product formed?
A flask with open mouth containing air was heated from 27°C to 477°C. Some air was expelled. What is the fraction of air expelled out?
At T (K), a closed vessel containing 2 g of an ideal gas (A) (molar mass = $ M_A $) exerted a pressure of 1 atm. When 16 g of another ideal gas (B) (molar mass = $ M_B $) was introduced into this vessel, the pressure increased to 2 atm. What is the correct relationship between $ M_A $ and $ M_B $?
If the standard enthalpy change and entropy change of a reaction at 298 K are 11.1 kJ mol$^{-1}$ and 42 J K$^{-1}$ mol$^{-1}$, which one of the following options is correct?
Which of the following reactions are endothermic and spontaneous?
1 L of 0.1 M HCl is added to 1 L of 0.1 M HA (weak acid) solution. To this solution, 16 g of solid NaOH is added. What is the pOH value of resultant solution? (Given molar mass of NaOH is 40 g/mol, $ \log 2 = 0.3, \log 4 = 0.6 $)
If $ n $ is the principal quantum number, as per quantum mechanical model of atom, the maximum number of electrons possible in any energy level is limited to
Which of the following species has an unpaired electron?
Which of the following molecules is not linear?
Chemistry of lanthanides ($ \text{Ln} $) is dominated by +3 oxidation state. Which of the following is incorrect?
The atomic mass of H and C is 1 and 12 u respectively. What is the ratio of weight of one atom each of H and C?
The number of species of the following that can act both as Bronsted acids and bases is $HCl , ClO _{4}^{-},{ }^{-} OH , H ^{+}, H _{2} O , HSO _{4}^{-}, SO _{4}^{2-}$, $H _{2} SO _{4}, Cl ^{-}$
$50\, mL$ of $0.02\, M \,NaOH$ solution is mixed $50\, mL$ of $0.06 \,M$ acetic acid solution, the $pH$ of resulting solution is $\left( p K_{a}\right.$ of acetic acid is $4.76, \log 5=0.70$ )
The molecule/ion having diamagnetic nature and a bond order of $1.0$ is
Which one of the following properties has same value for $H_2$ and $D_2$ ?
$6g$ of graphite is burnt in a bomb calorimeter at $25^{\circ}C$ and $1\, atm$ pressure. The temperature of water increased from $25^{\circ}C$ to $30^{\circ}C$. If $\Delta H$ of this reaction is $-248 \,kJ\, mol^{-1}$, find out $C_v$ (in $kJ\, K^{-1}$) of bomb calorimeter.
If the kinetic energy of $O_2$ gas is $4.0 \,kJ \; mol^{-1}$ . its RMS speed in $cm \; s^{-1}$ is
The volume of $0.02\, M$ acidified permanganate solution required for complete reaction of $60\, mL$ of $0.01\, MI^{-}$ ion solution to form $I_2$ in $mL$ is