Which of the following are ambident nucleophiles?
(A) Br– (B) CN– (C) NO2– (D) Both (B) and (C) The Correct Answer is (D) Both (B) and (C).... View Article
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What are the possible values of l if n = 5?
Solution: The principle quantum number(n), describe the energy level in which the electron an be found. l = 0 to... View Article
Which of the following statements does not form a part of Bohr’s model of a hydrogen atom?
(A) Energy of the electrons in orbit is quantised (B) Electrons revolve in different orbits around the nucleus (C) The... View Article
Which of the following are the correct statements?
(A) 2s-orbital has one nodal surface. (B) For 2px-orbital yz is the nodal plane. (C) Electron density in the XY-plane... View Article
The standard electrode potential of two half cells are given below- Ni2+ + 2e- Ni; E0 = -0.25V. Zn2+ + 2e- Zn; E0 = -0.77V. The voltage cell formed by combining the two half cells would be:
(A) +0.52 V (B) -0.52 V (C) +1.02 V (D) -1.02 V The Correct Answer is (A) +0.52 V. Solution:... View Article
Which of the following set of quantum numbers (n, l, m, s) represents the valence electron in a copper atom? (atomic number of Cu = 29)
(A) n = 4, l = 1, m = 0, s = +1/2 (B) n = 4, l = 1,... View Article
An unsaturated hydrocarbon ‘A’ adds two molecules of H2 and on reductive ozonolysis gives butane-1, 4-dial, ethanal and propanone. What will be the IUPAC name of ‘A.’
(A) 2-methylocta-2, 5-diene (B) 2-methylocta-2, 6-diene (C) 2-methylocta-3, 5-diene (D) 3-methylocta-2, 5-diene The Correct Answer is (B) 2-methylocta-2, 6-diene. Explore... View Article
The decreasing order of relative stability of +1 oxidation state of group 13 elements is
(A) Al < Ga < In < Tl. (B) Al < Ga < Tl < In. (C) Ga < Al... View Article
What are the constituent amines formed when the mixture of (i) and (ii) undergoes Hofmann bromamide degradation?
Options are: The Correct Answer is (B) Solution: The constituent amines formed when the mixture of (i) and... View Article
In which of the following instruments is the final image erect?
(A) Simple microscope (B) Galilean telescope (C) Astronomical telescope (D) Both (A) and (C) The Correct Answer is (D) Both... View Article
Which of the following is a homogeneous mixture?
(A) Seawater (B) Buttermilk (C) Sugar Solution (D) Starch Solution The Correct Answer is (C) Sugar Solution Solution: The mixture... View Article
The electrolysis of brine yields.
(A) Chlorine (B) Hydrogen (C) Sodium hydroxide (D) All Of These. The Correct Answer is (D) All Of These. The... View Article
Fe + S FeS. From the given chemical reaction, Fe acts as a.
(A) Reducing agent. (B) Oxidising agent. (C) Both (A) and (B) (D) None Of These The Correct Answer is (C)... View Article
Which of the following metal is leached by the cyanide process?
(A) Al (B) Ag (C) Cu (D) Na The Correct Answer is (B) Ag. Solution: Silver (Ag) is leached by... View Article
Which of the following is a correct order of atomic sizes: Ce (58), Sn (50), Yb (70) and Lu (71)?
(A) Sn > Lu > Yb > Ce (B) Ce > Sn > Yb > Lu (C) Ce > Sn... View Article
The calculated spin only magnetic moment of Cr2+ ion is
(A) 2.84BM (B) 3.87BM (C) 4.90BM (D) 5.92BM The Correct Answer is (C) 4.90BM Solution: Electronic configuration of the Cr2+... View Article
Which of the following ions is responsible for the brown colour in the ring test for nitrate?
(A) [Fe(NO2)6]4- (B) [Fe(H2)5NO2]+ (C) [Fe(CN)5NO2]- (D) [Fe(H2O)5NO]2+ The Correct Answer is (D) [Fe(H2O)5NO]2+ Solution: Pentaaquanitrosylium iron (I) ion [Fe(H2O)5NO]2+... View Article
Element A has 3 electrons in the outermost orbit and element B has 6 electrons in the outermost orbit. The formula of the compound formed A and B would be:
(A) A2B (B) A2B2 (C) A2B3 (D) A3B6 The Correct Answer is (C) A2B3 Solution: In a neutral molecule, the... View Article
Which of the following statements is wrong?
(A) Van der Waal’s radius of iodine is more than its covalent radius. (B) The first ionisation energy of nitrogen... View Article
Which of the following statement is incorrect for the isoelectronic species?
(A) Isoelectronic species have the same number of electrons (B) Isoelectronic species have different numbers of protons (C) In isoelectronic... View Article
