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Which of the following statement is true about real gases?

(A) They show deviation from ideal behaviour (B) The molecules causes attractive forces on each other (C) They obey gas laws at lower... View Article

Which of the following reagents can be used to distinguish between phenol and benzyl alcohol ?

(A) Bromine in CCl4 (B) Ferric chloride (C) Sodium hydroxide (D) Sodium bicarbonate The Correct Answer is (B) Ferric chloride.... View Article

Nitric acid does not react with:

(A) Zinc (B) Iron (C) Copper (D) Magnesium The Correct Answer is (D) Magnesium Solution: Nitric acid (HNO3) does not react with... View Article

Assertion: when a piece of copper metal is added to dilute sulphuric acid, the solution turns blue. Reason: Copper reacts with dilute sulphuric acid to form blue copper(II)sulphate solution.

(A) Both Assertion and Reason are false. (B) Assertion is true, but Reason is false. (C) Both Assertion and Reason are true. The reason is the... View Article

Make a classification key for the following groups of substances. a. rubber, paper, steel plate, glass.

Given groups of substances are: Glass Paper Rubber Seel plate Solution: Explore more such questions and answers at BYJU'S.... View Article

KMnO4 acts as an oxidising agent in an alkaline medium. When alkaline KMnO4 is treated with KI, iodide ion is oxidised to :

(A) I2 (B) IO (C) IO- (D) IO-3 The Correct Answer is (D) IO-3 Solution: When alkaline KMnO4 is treated with KI, the Iodide ion(I-) is... View Article

Which condition is not satisfied by an ideal solution?

(A) (B) (C) (D) None Of These The Correct Answer is (B) Solution: The following are the conditions that are satisfied by an ideal... View Article

Which of the following statement is true about graphite?

(A) Graphite is an ionic solid (B) Graphite is a metallic solid (C) Graphite is a covalent solid (D) Graphite is a van der Waals solid... View Article

Which of the following acid is the strongest acid?

(A) CH3COOH (B) HCOOH (C) (CH3)3CCOOH (D) (CH3)2CHCOOH The Correct Answer is (B) HCOOH Solution: Formic acid (HCOOH) is the most potent... View Article

Gabriel phthalimide synthesis is used for the preparation of

(A) Primary amines (B) Secondary amines (C) Tertiary amines (D) Quaternary amines The Correct Answer is (A) Primary amines. Solution:... View Article

A gaseous compound of nitrogen and hydrogen contains 12.5 % hydrogen by mass. The molecular formula of the compound if its relative molecular mass is 32, is: [N=14, H=1]

(A) NH4 (B) N2H3 (C) N2H4 (D) N2H6 The Correct Answer is (C) N2H4 Solution: 100 g of the compound contains: 12.5 g of Hydrogen and 87.5 g... View Article

The efficiency of a fuel cell is given by:

(A) (B) (C) (D) The Correct Answer is (B) Solution: The thermodynamic efficiency of a fuel cell is given by the ratio of the... View Article

Which of the compound gives the most stable carbonium ion on dehydration?

(A) CH3OH (B) CH3CHO (C) (CH3)3COH (D) CH2 = CH - CH2CH2OH The Correct Answer is (C) (CH3)3COH. Solution: The dehydration of tertiary... View Article

Alkyl halides though polar are immiscible with water because:

(A) To break the hydrogen bonds between the water molecules (B) The molecules of water are held together by Hydrogen bonds (C) To overcome the... View Article

The longest wavelength present in the Balmer series of hydrogen is:

(A) 6524 (B) 6556 (C) 6563 (D) 6663 The Correct Answer is (C) 6563 Solution: For the longest wavelength in the Balmer... View Article

Which of the following statements is true about the perhydrol?

(A) It is a 30 per cent H2O2 solution. (B) It is a strong oxidising agent used as a ripening agent (C) It is being used as an antiseptic and... View Article

The work function of some metals is listed below. How many of these metals show the photoelectric effect when the light of 300 nm wavelength falls on them?

Metal K Na Li Mg Ag Fe W Cu Pt ϕ (eV) 2.2 2.3 2.4 3.7 4.3 4.7 4.75 4.8 6.3 (A) Two (B) Four (C) Five (D)... View Article

Which of the following has pseudo inert gas configuration?

(A) K+ (B) S-2 (C) Cu+ (D) Na+ The Correct Answer is (C) Cu+ Solution: An element has 18 electrons instead of 8 electrons in (n−1) shell... View Article

Which among the following compound is the strongest base?

(A) C6H5NH2 (B) C6H5CH2NH2 (C) p-NH2C6H4NH2 (D) m-NO2C6H4NH2 The Correct Answer is (B) C6H5CH2NH2 Solution: C6H5CH2NH2 - Benzylamine... View Article

Caffeine has a molecular weight of 194. If it contains 28.9% by mass of nitrogen, the number of atoms of nitrogen in one molecule of caffeine is:

(A) 2 (B) 3 (C) 4 (D) 6 The Correct Answer is (C) 4 Solution: As given in the question, Caffeine has a molecular weight of 194. Mass of... View Article

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