Which alcohol produces turbidity with lucas reagent most slowly?
Answer: Tertiary alcohols Explanation The -Lucas test is used to discriminate between different types of alcohol. The differential in reactivity... View Article
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Which of the following is a chain growth polymer? A.) Teflon B.) Nylon-6,6 C.) Nylon-6 D.) None
Answer: (a) Teflon Explanation A chain growth polymer is one that is generated when molecules of the same or different... View Article
A brown ring is formed in the ring test for NO3- ion. It is due to the formation of:
The nitrate ion brown ring test is a qualitative test that verifies the presence of nitrate ion. A freshly produced... View Article
Binary liquid mixture will show negative deviation from raoult’s law. Explain
According to Raoult’s law, the partial vapour pressure of each component in a mixed solution is proportional to the pure... View Article
Freon 12 is manufactured from tetrachloromethane by?
Freon-12 is made by CCl4 by the Swart’s reaction, as shown below: 3CCl4 + 2SbF3 ⟶ 3CCl2F2(Freon−12) + 2SbCl3 Swarts’... View Article
The temperature coefficient of most of the reactions lies between:
Temperature coefficient is the ratio of rate constant of a reaction at a temperature and rate constant of the reaction... View Article
Auto reduction process is used in the extraction of:
Sulphide ores containing less electropositive metals such as Cu, Hg, Pb, and others are heated in the presence of air... View Article
o xylene on ozonolysis will give ?
Ozonolysis is a chemical process in which ozone causes the oxidative breakage of an unsaturated bond in a molecule. The... View Article
Why is fluorine the most electronegative element?
The capacity of an element to establish chemical bonds by attracting an electron is measured by electronegativity. The capacity of... View Article
Which of the following properties generally decrease along a period? (A) Ionization energy (B) Electron affinity (C) Metallic character (D) Valency
Answer: (c) Metallic character Explanation Along a period the electropositive character decreases, therefore the ionization energy, electron affinity and valency... View Article
75.2 g of C6H5OH (Phenol) is dissolved in a solvent of Kf = 14 , If the depression in freezing point is 7K then find the % of phenol that dimerises.
According to the concept of freezing point depression whenever a solute is added to a pure solvent, the freezing point... View Article
The formation of diethyl ether from ethanol is catalysed by: (A) H2SO4 (B) AlO3 (C) Cu (D) Ni
Answer: (a) Explanation The nucleophilic substitution process produces diethyl ether. Diethyl ether is generated by the dehydration of one of... View Article
Biuret test is not given by: a.) Carbohydrates b.) Polypeptides c.) Urea d.) Proteins
Answer: (a) Carbohydrates Explanation The biuret test is a synthetic method for determining whether peptide bonds exist. In an alkaline... View Article
Considering the elements B, Al, Mg and K, the correct order of their metallic character is: (a) B > Al >Mg > K (b) Al > Mg > B > K (c) Mg > Al > K > B (d) K > Mg > Al > B
The metallic character of the elements is highest at the extremely left (low ionisation energies) and then decreases across the... View Article
A sigma bond is formed by the overlapping of?
A sigma bond is the strongest covalent chemical link. They’re made up of atomic orbitals colliding in a head-on collision.... View Article
Copper is extracted by hydrometallurgy from low grade ores. Explain
The low- grade ore from which copper is to be recovered goes through a leaching procedure first. The process of... View Article
Which compound will react fastest by sn1 mechanism?
In an SN1 reaction with the OH- ion, C6H5— CH2— Cl will react quicker. This is owing to the carbocation’s... View Article
Order of reactivity of halogens towards hydrogen is: A) F2>Cl2>Br2>I2 B) I2>Br2>Cl2>F2 C) Cl2>Br2>I2>F2 D) Br2>Cl2>F2>I2
The halogens are fluorine, chlorine, bromine, and iodine. They are members of Group 17, commonly known as the halogen group.... View Article
In a certain electronic transition in a hydrogen atom from an initial state to a final state, the difference of orbit radius is 8 times the first Bohr radius. Which transition will satisfy the given condition? (A) 7→1 (B) 6→1 (C) 5→1 (D) 3→1
Answer: (d) Explanation The hydrogen is the element with atomic number 1 . An atom consists of energy levels like... View Article
Silver is refined by cupellation. Explain
Cupellation is based on the idea that noble metals do not oxidise and are chemically inert. When noble metals are... View Article
