List of top Questions asked in AP EAPCET

Identify the molecule for which the enthalpy of atomization $ (\Delta_a H^\circ) $ and bond dissociation enthalpy $ (\Delta_{\text{bond}} H^\circ) $ are not equal.

For the reaction: $A_2(g) \rightleftharpoons B_2(g)$

The equilibrium constant $K_c$ is given as 99.0. In a 1 L closed flask, two moles of $B_2(g)$ is heated to $T(K)$. What is the concentration of $B_2(g)$ (in mol L$^{-1}$) at equilibrium?

‘X’ on hydrolysis gives two products. One of them is solid. What is ‘X’?

Ba, Ca, Sr form halide hydrates. Their formulae are $ BaCl_2 \cdot xH_2O $, $ CaCl_2 \cdot yH_2O $, $ SrCl_2 \cdot zH_2O $. The values of $ x, y, z $ respectively are:

The bond angles $ b_1, b_2, b_3 $ in the above structure are respectively in $ ^\circ $:

Which of the following oxides is acidic in nature?

Match the following:

The number of nucleophiles in the following list is: \[ CH_3NH_2, \quad CH_3CHO, \quad C_2H_4, \quad CH_3SH \]

An alkene X ($ C_4H_8 $) on reaction with HBr gave Y ($ C_4H_9Br $). Reaction of Y with benzene in the presence of anhydrous $ AlCl_3 $ gave Z which is resistant to oxidation with $ KMnO_4 + KOH $. What are X, Y, Z respectively?

The density of nitric acid solution is 1.5 g mL$^{-1}$. Its weight percentage is 68. What is the approximate concentration (in mol L$^{-1}$) of nitric acid? (N = 14 u; O = 16 u; H = 1 u)

The osmotic pressure of seawater is 1.05 atm. Four experiments were carried out as shown in the table. In which of the following experiments, pure water can be obtained in part-II of the vessel?

For a first-order reaction, the concentration of reactant was reduced from 0.03 mol L$^{-1}$ to 0.02 mol L$^{-1}$ in 25 min. What is its rate (in mol L$^{-1}$ s$^{-1}$)?

‘X’ is a protecting colloid. The following data is obtained for preventing the coagulation of 10 mL of gold sol to which 1 mL of 10% NaCl is added. What is the gold number of ‘X’?

Which sol is used as an intramuscular injection?

The reactions which occur in blast furnace at 500 – 800 K during extraction of iron from haematite are
i. $3Fe_2O_3 + CO \rightarrow 2Fe_3O_4 + CO_2$
ii. $Fe_2O_3 + 3C \rightarrow 2Fe + 3CO$
iii. $FeO + 4CO \rightarrow 3Fe + 4CO_2$
iv. $FeO + CO \rightarrow 2FeO + CO_2$

Which of the following reactions give phosphine?
i. Reaction of calcium phosphide with water
ii. Heating white phosphorus with concentrated NaOH solution in an inert atmosphere
iii. Heating red phosphorus with alkali

The paramagnetic complex ion which has no unpaired electrons in $ t_{2g} $ orbitals is

Which of the following is an example for fibre?

When glucose is oxidized with nitric acid, the compound formed is

The number of essential and non-essential amino acids from the following list respectively is Given amino acids: Val, Gly, Leu, Lys, Pro, Ser

An alkene X ($ C_4H_8 $) does not exhibit cis-trans isomerism. Reaction of X with $ Br_2 $ in the presence of UV light gave Y. What is Y?

The two reactions involved in the conversion of benzene diazonium chloride to biphenyl are respectively

Consider the reactions: