Archives

Which one of the following reactions will not form acetaldehyde?

Which one of the following reactions will not form acetaldehyde? Answer: (a) Hence Option a is the correct answer... View Article

Which of the glycosidic linkage galactose and glucose is present in lactose?

a. C-1 of glucose and C-6 of galactose b. C-1 of galactose and C-4 of glucose c. C-1 of glucose and C-4 of galactose d. C-1 of galactose and C-6... View Article

The plots of radial distribution functions for various orbitals of hydrogen atom against ‘r’ are given below:

The correct plot for 3s orbital is a. (4) b. (2) c. (1) d. (3) Answer: (a) 3s orbital Number of radial nodes = n – λ – 1 For... View Article

Given below are two statements: Statement-I: An allotrope of oxygen is an important intermediate in the formation of reducing smog. Statement-II: Gases such as oxides of nitrogen and Sulphur present in the troposphere contribute to the formation of photochemical smog.

a. Statement I and Statement II are true b. Statement I is true about Statement II is false c. Both Statement I and Statement II are false d.... View Article

Which statement is correct?

a. Buna-S is a synthetic and linear thermosetting polymer b. Neoprene is an addition copolymer used in plastic bucket manufacturing c.... View Article

In which of the following pairs, the outermost electronic configuration will be the same?

a. Fe2+ and Co+ b. Cr+ and Mn2+ c. Ni2+ and Cu+ d. V2+ and Cr+ Answer: (b) Cr+ → Ar]3d5 Mn2+ → [Ar]3d5... View Article

The correct statement about B₂H₆ is:

a. All B–H–B angles are of 120°. b. Its fragment, BH3, behaves as a Lewis base. c. Terminal B–H bonds have less p-character... View Article

The major product of the following chemical reaction is:

a. (CH3CH2CO)2O b. CH3CH2CHO c. CH3CH2CH3 d. CH3CH2CH2OH Answer: (b) The major product is CH3CH2CHO... View Article

Given below are two statements:

Statement-I: CeO2 can be used for oxidation of aldehydes and ketones. Statement-II: Aqueous solution of EuSO4 is a strong reducing agent. a.... View Article

Identify A in the given chemical reaction.

Answer: (d) Aromatization reaction or hydroforming reaction.... View Article

According to molecular orbital theory, the species among the following that does not exist is:

a. He2- b. He2+ c. O22- d. Be2 Answer: (d) B.O. of Be2 is zero, so it does not exist.... View Article

In Freundlich adsorption isotherm at moderate pressure, the extent of adsorption (x/m) is directly proportional to P^x. The value of x is:

a. ∞ b. 1 c. zero d. 1/n Answer: (d) x / m = px The formula is x / m = px Hence, x= 1 / n. The value of 'n' is any natural number.... View Article

Which of the following equations depicts the oxidizing nature of H₂O₂?

a. Cl2 + H2O2 → 2HCl + O2 b. KlO4 + H2O2 → KlO3 + H2O + O2 c. 2l– + H2O2 + 2H+ → I2 + 2H2O d. I2 + H2O2 + 2OH–... View Article

Ellingham diagram is a graphical representation of:

a. ΔG vs T b. (ΔG – TΔS) vs T c. ΔH vs T d. ΔG vs P Answer: (a) Ellingham diagram tells us about the... View Article

Assuming ideal behavior, the magnitude of log K for the following reaction at 25ºC is x × 10^–1. The value of x is __________. (Integer Answer)

3HC ≡ CH(g) ⇌ C6H6 (l) [Given: ΔfG° (HC = CH) = – 2.04 × 105] mol–1; ΔfG°(C6H6) = – 1.24 × 105 J mol–1; R = 8.314 J K–1 mol–1] Answer: 855... View Article

Sucrose hydrolysis in acid solution into glucose and fructose following first order rate law with a half-life of 3.33 h at 25ºC. After 9h, the fraction of sucrose remaining is f. The value of is _________× 10^–2 (Rounded off to the nearest integer)

[Assume: ln10 = 2.303, ln2 = 0.693] Answer: 81 t1/2 = 3.33h = 10 / 3h Fraction of sucrose remaining , f = ... View Article

The formula of a gaseous hydrocarbon which requires 6 times of its own volume of O₂ for complete oxidation and produces 4 times its own volume of CO₂ is C_xH_y. The value of y is

Answer: 8 CxHy + 6O2 4CO2 + y/2 H2O Applying POAC on 'O' atoms 6 × 2 = 4 × 2 + y/2 × 1 y/2 = 4 ⇒ y = 8... View Article

1.86 g of aniline completely reacts to form acetanilide. 10% of the product is lost during purification. Amount of acetanilide obtained after purification (in g) is ____× 10^–2

Answer: 243 93 g Aniline produce 135 g acetanilide 1.86 g produce 135 × 1.86 / 93 = 2.70 g At 10% loss, 90% product will be formed after... View Article

The total number of amines among the following which can be synthesized by Gabriel synthesis is _______

Answer: 3 Only 1o amines can be prepared by Gabriel synthesis.... View Article

The solubility product of PbI₂ is 8.0 × 10^–9. The solubility of lead iodide in 0.1 molar solution of lead nitrate is x × 10^–6 mol/L. The value of x is ________ (Rounded off to the nearest integer)

Given: √2 = 1.41 Answer: 141 PbI2(s) ⇌ Pb2+ (aq) + 2I- (aq) S+0.1 2s KSP (PbI2) = 8 × 109 KSP = [Pb+2][I-]2 8 × 10–9 = (S... View Article

M	T	W	T	F	S	S
	1	2	3	4	5	6
7	8	9	10	11	12	13
14	15	16	17	18	19	20
21	22	23	24	25	26	27
28	29	30