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Which of the following is least basic?

a. b. c. d. Answer: (a) Due to higher resonance, lp of N is not available for accepting H+. So, it is least basic.... View Article

In the below reaction, the reagent “A” is:

In the below reaction, the reagent “A” is: a. NaBH4, H3O+ b. HCl, Zn-Hg c. Alkaline KMnO4, H+ d. LiAlH4 Answer: (c)... View Article

The greenhouse gas/es is (are)

1. Carbon dioxide 2. Oxygen 3. Water vapour 4. Methane Choose the most appropriate answer from the options given below: a. (1) and (2) only... View Article

The correct statements about H₂O₂ are:

(1) used in the treatment of effluents. (2) used as both oxidizing and reducing agents. (3) the two hydroxyl groups lie in the same plane. (4)... View Article

Which of the following polymer is used in the manufacture of wood laminates?

a. Melamine formaldehyde resin b. Cis-poly isoprene c. Phenol and formaldehyde resin d. Urea-formaldehyde resin Answer: (a) Melamine... View Article

Two statements are given below: Statement-I: Sodium hydride can be used as an oxidising agent. Statement-II: The lone pair of electrons on nitrogen in pyridine makes it basic.

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

An unsaturated hydrocarbon X on ozonolysis gives A.

An unsaturated hydrocarbon X on ozonolysis gives A. Compound A when warmed with ammoniacal silver nitrate forms a bright silver mirror along the... View Article

Which of the following reduction reaction CANNOT be carried out with coke?

a. Fe2O3 → Fe b. ZnO → Zn c. Al2O3 → Al d. Cu2O → Cu Answer: (c) Al is extracted by electrolytic reduction of Al2O3.... View Article

The exact volumes of 1 M NaOH solution required to neutralize 50 mL of 1 M H₃PO₃ solution and 100 mL of 2 M H₃PO₂ solution, respectively, are:

a. 100 mL and 50 mL b. 50 mL and 50 mL c. 100 mL and 100 mL d. 100 mL and 200 mL Answer: (d) (1) 2NaOH + H3PO3 → Na2HPO3 + 2H2O 100 mmole... View Article

The characteristics of elements X, Y and Z with atomic numbers, respectively, 33, 53 and 83 are:

a. X and Z are non-metals and Y is a metalloid. b. X and Y are metalloids and Z is a metal. c. X, Y and Z are metals. d. X is a metalloid, Y is a... View Article

The INCORRECT statement below regarding colloidal solutions is:

a. A colloidal solution shows colligative properties b. An ordinary filter paper can stop the flow of colloidal particles c. A colloidal solution... View Article

Identify the elements X and Y using the ionization energy values given below: Ionization energy (kJ/mol)

Identify the elements X and Y using the ionization energy values given below: Ionization energy (kJ/mol) - 1st 2nd X 495 4563... View Article

Arrange the following metal complex/compounds in the increasing order of spin only magnetic moment. Presume all three, high spin systems.

(Atomic numbers Ce = 58, Gd = 64 and Eu = 63) (1) (NH4)2[Ce(NO3)6] (2) Gd(NO3)3 (3) Eu(NO3)3 a. (1) < (3) < (2) b. (1) < (2) < (3) c.... View Article

Ammonolysis of alkyl halides followed by the treatment with NaOH solution can be used to prepare primary, secondary and tertiary amines. The purpose of NaOH in the reaction is:

a. to remove basic impurities b. to activate NH3 used in the reaction c. to increase the reactivity of alkyl halide d. to remove acidic... View Article

The angular speed of the truck wheel is increased from 900 rpm to 2460 rpm in 26 seconds. The number of revolutions by the truck wheel during this time is ______.

(Assuming the acceleration to be uniform). Answer: (728) = 82π rad/second = 2 π rad/s2 θ/2π = no. of revolution = 728... View Article

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