Chemistry Questions

Solid carbon, CaO and CaCO₃ are mixed and allowed to attain equilibrium at T K. The partial pressure of CO is ______ × 10-1 atm.

Consider the reaction : The magnitude of enthalpy change for the reaction in kJ mol-1 is ________. (Nearest integer) Given:

Consider two radiations of wavelengths: 1. λ1 = 2000 Å 2. λ2= 6000 Å The ratio of the energies of these two radiations (E₁/E₂) is ________. (Nearest integer)

'x' is the product which is obtained from benzene by reacting it with carbon monoxide and hydrogen chloride in the presence of cuprous chloride. 'y' is the major product obtained from benzene by reacting it with ethanoyl chloride in the presence of a

Number of paramagnetic complexes among the following is ________.

Find the correct statements related to group 15 hydrides. A. Reducing nature increases from NH₃ to BiH₃ B. Tendency to donate lone pair of electrons decreases from NH₃ to BiH₃ C. The stability of hydrides decreases from NH₃ to BiH₃ D. HEH bond angle

Match List-I with List-II.

Given below are two statements : R = 8.314 J K-1 mol-1 and 1 cal = 4.2 J Statement I : When Ea = 12.6 kcal/mol, the room temperature rate constant is doubled by a 10°C increase in temperature (298 K to 308 K) Statement II : For a first order reaction

Which of the following amino acid will give violet coloured complex with neutral ferric chloride solution?

The incorrect statement from the following with respect to carbohydrates is :

Which statements are True? A. In Hoffmann bromamide degradation, 4 moles of NaOH and 2 moles of Br₂ are consumed per mole of an amide. B. Hoffmann bromamide reaction is not given by alkyl amides. C. Primary amines can be synthesized by Hoffmann broma

Consider the following reaction. (i) NaBH₄/MeOH (ii) NaOH(aq.), Δ (iii) H₃O⁺ The major product (P) formed is :

Given below are two statements : Statement-I : Due to increase in van der Waals forces, the order of boiling points is CH₃CH₂CH₂I > CH₃CH₂I > CH₃I. Statement-II : As p-dichlorobenzene is more symmetric, its melting point is higher than o-dichlorobenz

n-Butane on monochlorination under photochemical conditions gives an optically active compound “P”. “P” on further chlorination gives dichloro compounds. The number of dichloro compounds obtained (ignore stereoisomers) is :

The total number of aromatic compounds/species from the following is

The major product of which of the following reaction is not obtained by rearrangement reaction?

Given below are two statements : Statement I : Vapours of the liquid with higher boiling point condense before vapours of the liquid with lower boiling points in fractional distillation. Statement II : The vapours rising up in the fractionating colum

Given below are two statements for catalytic properties of transition metals : Statement I : First row transition metals which act as catalyst utilise their 3d electrons only for formation of bonds between reactant molecules and atoms on the surface

Given below are two statements : Statement I : The number of pairs among [Ti⁴⁺, V²⁺], [V²⁺, Mn²⁺], [Mn²⁺, Fe³⁺] and [V²⁺, Cr²⁺] in which both ions are coloured is 3. Statement II : The number of pairs among [La³⁺, Yb²⁺], [Lu³⁺, Ce⁴⁺] and [Ac³⁺, Lr³⁺]

Given at 298 K : The in Volt at 298 K is given by :

Consider the following reactions in which all the reactants and products are present in gaseous state The value of K3 for the equilibrium

Which of the following are not correct ? A. For water, magnitude of Kb is more than the magnitude of Kf. B. The elevation in boiling point of water when a non-volatile solute is added to it is larger in magnitude than its depression in freezing point

Bromine trifluoride autoionizes to form and BrF₄⁻. The shapes of the cation and anion are respectively ______, and ______.

Given below are two statements : Given : Molar mass of C, H, O, Cl are 12, 1, 16 and 35.5 g mol⁻¹, respectively. Statement I : In 30%(w/w) solution of methanol in CCl₄ (at T K), the mole fraction of CCl₄ is equal to 0.33. Statement II : Mixture of me

Match List-I with List-II.