Observe the following reaction: $ 2A_2(g) + B_2(g) \xrightarrow{T(K)} 2A_2B(g) + 600 \text{ kJ} $. The standard enthalpy of formation $ (\Delta_f H^\circ) $ of $ A_2B(g) $ is:
The angular momentum of an electron in a stationary state of \(Li^{2+}\) (\(Z=3\)) is \( \frac{3h}{\pi} \). The radius and energy of that stationary state are respectively.
Match the following:
Observe the following structure: The formal charges on the atoms 1, 2, 3 respectively are:
Two statements are given below: Statement-I: The ratio of the molar volume of a gas to that of an ideal gas at constant temperature and pressure is called the compressibility factor. Statement-II: The RMS velocity of a gas is directly proportional to the square root of \( T(K) \).
Given below are two statements: Statement-I: In the decomposition of potassium chlorate, Cl is reduced. Statement-II: Reaction of Na with \( O_2 \) to form \( Na_2O \) is a redox reaction.
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?
The bond angles \( b_1, b_2, b_3 \) in the above structure are respectively in \( ^\circ \):
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 waterii. Heating white phosphorus with concentrated NaOH solution in an inert atmosphereiii. Heating red phosphorus with alkali
