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Which of the following compounds will be suitable for Kjeldahl’s method for nitrogen estimation?

Answer: (1) Kjeldahl method is not applicable for compounds containing nitrogen in nitro, and azo groups and nitrogen in ring, as N of these... View Article

Which of the following salts is the most basic in aqueous solution?

1) CH3COOK 2) FeCl3 3) Pb(CH3COO)2 4) Al(CN)3 Answer: (1) CH3COOK + H2O -> CH3COOH + KOH (basic) FeCl3 - Acidic solution Al(CN)3 - Salt... View Article

[latex]Fe{{C}_{2}}{{O}_{4}},F{{e}_{2}}{{({{C}_{2}}{{O}_{4}})}_{3}},FeS{{O}_{4}},F{{e}_{2}}{{(S{{O}_{4}})}_{3}}[/latex] one mole each, will react with how many moles of [latex]KMn{{O}_{4}}[/latex]

a.1 b.2 c.3 d.5 Answer: (b) ∴ Total:... View Article

Three mole of Ag is heated from 300 K to 1000 K. Calculate ΔH when P = 1 atm and C_P = 23 + 0.01 T.

a. 62 kJ/mol b. 45 kJ/mol c. 38 kJ/mol d. 54 kJ/mol Answer: (a)... View Article

In isoelectronic species [latex]C{{l}^{-}},Ar,C{{a}^{2+}}[/latex] size differ due to

a.Nuclear charge b.Electronic – electronic repulsion in valence shell c.Magnetic quantum number d.Principal quantum number Answer: (a) In... View Article

Assertion: Ozone is getting depleted due to CFCs. Reason: With the deplection of ozone layer more UV radiation filters into troposphere

a. Both Assertion and Reason are true and Reason is the correct explanation of Assertion. b. Both Assertion and Reason are true but Reason is... View Article

What will the order of magnetic moment (μ) be

Given complexes are low spin complexes, Then order of magnetic moment (μ) for is a. b. c. d. Answer: (c) For... View Article

For [latex]Z{{r}_{3}}{{(P{{O}_{4}})}_{4}}[/latex] the solubility product is K_sp and solubility is S. Find the correct relation.

a. b. c. d. Answer: (a) It is A3B4 type of salt Hence... View Article

Solution of 100 ml water contains 0.73 g of Mg(HCO₃)₂ and 0.81 g of Ca(HCO₃)₂. Calculate the hardness in terms of ppm of CaCO₃

a. 102 ppm b. 104 ppm c. 5 × 103 ppm d. 103 ppm Answer: (c) Number of moles of Number of moles of .... View Article

A forms ccp lattice, B occupy half of the octahedral voids and ‘O’ occupy all the tetrahedral voids. Calculate formula –

a. A2BO4 b. ABO4 c. A2B2O d. A2B2O Answer: (a) CCP lattice of A → no of atom of A per unit cell → 4. N oct. voids = 2 N tetra.Voids. But... View Article

Arrange the following set of quantum numbers having highest energy of an electron.

(p) n = 4 l = 1 m = +1 (q) n = 4 l = 2 m = -1 s (r) n = 3 l = 2 m = 0 s (s) n = 3 l = 1 m + 1 s a. q > r > p > s b. q... View Article

In a mixture of A and B having vapour pressure of pure A and pure B are 400 mm Hg and 600 mm Hg respectively, mole fraction of B in liquid phase is 0.5. Calculate total vapour pressure and mole fraction of A and B in vapour phase

a.500, 0.4, 0.6 b.500, 0.5, 0.5 c.450, 0.4, 0.6 d.450, 0.5, 0.5 Answer : (a) = 0. 5 × 400 + 0.5 × 600 = 500 mm of Hg... View Article

In Freundlich isotherm, [latex]frac{x}{m}propto {{P}^{a}}.[/latex] Find the value of a from the following graph

a. b. c. d. 1 Answer : (a) Freundlich Isotherm equations:... View Article

Which of the following is not correct for an ideal gas as per first law of thermodynamics

a. Adiabatic ΔU = -w b. Isothermal q = -w c. cyclic q = -w d. Isochoric ΔU = q Answer: (a) From 1st Law, ∆U = q + ω In adiabatic, q = 0... View Article

Find the compound ‘X’ which gives the following test.

Neutral FeCl3 -ve Fehling solution -ve Iodoform reaction +ve Grignard reagent +ve Answer: (a) Neutre Fecl3 → - ve (phenol... View Article

Which is the correct option for the following reaction:

Answer: (c) In a2o coupling reaction, the Hydrogen is taken from the less hindered para position.... View Article

Choose the correct option for the following reaction:

Answer: (a) Two reaction occur simultaneously a) Ether hydrolysis using HBr b) Electrophilic addition of H-Br... View Article

X will be:

X will be: Answer: (c)... View Article

An acidified solution of 0.05 MZn²⁺ is saturated with 0.1 M H₂S. What is the minimum molar concentration (M) of H⁺ required to prevent the precipitation of ZnS?

Use sp(ZnS) = 1.25 x 10-22 and overall dissociation constant of H2S, KNET = 1 2 = 1 × 10-21. Answer: 0.2... View Article

Tin is obtained from cassiterite by reduction with coke. Use the data given below to determine the minimum temperature (in K) at which the reduction of cassiterite by coke would take place.

At 298 K: ∆ 0(SnO2( )) = −581.0 kJ mol−1, ∆ 0(CO2(g)) = −394.0 kJ mol−1, 0(SnO2(s)) = 56.0J K−1mol−1,... View Article

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