Bond it Chemical. We covered all the Bond it Chemical in this post for free so that you can practice well for the exam.
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MCQ on Bond it Chemical for Students
Which one of the following pairs of molecules will have permanent dipole moments for both members?
(a) NO₂ and CO₂
(b) NO₂ and O3
(c) SiF4 and CO₂
(d) SiF4 and NO₂
Option b – NO₂ and O3
Which of the following is/are misconception(s) associated with resonance? (i) The molecule exists for a certain fraction of time in one canonical form and for other fractions of time in other canonical forms. (ii) The canonical forms have no real existence. (iii) There is no such equilibrium between the canonical forms.
(a) (i) only
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (iii) only
Option a – (i) only
Among the following, the molecule of high dipole moment is
(a) CCl4
(b) NH3
(c) H₂O
(d) CHCl3
Option c – H₂O
The light emitted by fireflies is due to
(a) a radioactive substance
(b) chemiluminiscence process
(c) a photoelectric process
(d) the burning of phosphorus
Option b – chemiluminiscence process
Which one among the following has been producing/can produce light by a chemical change?
(a) Sun
(b) Moon
(c) Electric bulb
(d) Lightning and thunder
Option a – Sun
Which of the following pairs will form the most stable ionic bond?
(a) Na and Cl
(b) Mg and F
(c) Li and F
(d) Na and F
Option b – Mg and F
The molecule which has zero dipole moment is
(a) CH3Cl
(b) NF3
(c) BF3
(d) ClO₂
Option c – BF3
The most polar bond is
(a) C-F
(b) C-O
(c) C-Br
(d) C-S
Option a – C-F
Hydrogen chloride molecule contains
(a) polar covalent bond
(b) double bond
(c) co-ordinate bond
(d) electrovalent bond
Option a – polar covalent bond
Which of the following methods is used for measuring bond length?
(a) X-ray diffraction
(b) Electron-diffraction
(c) Spectroscopic techniques
(d) All of these
Option d – All of these
……… is measured as the radius of an atom’s core which is in contact with the core of an adjacent atom in a bonded situation.
(a) van der Waal’s radius
(b) Bond length
(c) Covalent radius
(d) Ionic radius
Option c – Covalent radius
What is the role of a positive catalyst in a chemical reaction?
(a) It increases the rate of reaction
(b) It decreases the rate of reaction
(c) It increases the yield of the products
(d) It provides better purity of the products
Option c – It increases the yield of the products
Electricity is produced through the dry cell from
(a) chemical energy
(b) thermal energy
(c) mechanical energy
(d) nuclear energy
Option a – chemical energy
Which one of the following is an example of chemical change?
(a) Burning of paper
(b) Magnetization of soft iron
(c) Dissolution of cane sugar in water
(d) Preparation of ice cubes from water
Option a – Burning of paper
A closed bottle containing water at room temperature was taken to the Moon and then the lid is opened. The water will
(a) freeze
(b) boil
(c) decompose into oxygen and hydrogen
(d) not change at all
Option a – freeze
Who introduced the term covalent bond?
(a) Lewis
(b) Langmuir
(c) Nyholm and Gillespie
(d) Heitler and London
Option b – Langmuir
The bond formed as a result of the electrostatic attraction between the positive and negative ions is termed as …
(a) Chemical bond
(b) Electrovalent bond
(c) Co-ordinate bond
(d) Covalent bond
Option b – Electrovalent bond
When a metal atom combines with a non-metal atom, the non-metal atom will
(a) lose electrons and decrease in size
(b) lose electrons and increase in size
(c) gain electrons and decrease in size
(d) gain electrons and increase in size
Option d – gain electrons and increase in size
Which of the following combination will form an electrovalent bond?
(a) P and Cl
(b) NH3 and BF3
(c) H and Ca
(d) H and S
Option c – H and Ca
A stainless steel chamber contains Ar gas at a temperature of T and pressure of P. The total number of Ar atoms in the chamber is n. Now Ar gas in the chamber is replaced by CO₂ gas and the total number of CO₂ molecules in the chamber is n/2 at the same temperature T. The pressure in the chamber now is P’. Which one of the following relations holds true? (Both the gases behave as ideal gases)
(a) P’ = P
(b) P’ = 2P
(c) P’ = P/2
(d) P’ = P/4
Option c – P’ = P/2
Which one of the following reactions will give NO (nitric oxide) gas as one of the products?
(a) 3 Cu + 8HNO3 (dilute) →
(b) Cu + 4HNO3 (conc.) →
(c) 4Zn + 10HNO3 (dilute) →
(d) Zn + 4HNO3 (conc.) →
Option a – 3 Cu + 8HNO3 (dilute) →
Which one of the following is an oxidation-reduction reaction?
(a) NaOH + HCl → NaCl + H₂O
(b) CaO + H₂O → Ca(OH)₂
(c) 2Mg+O₂ → 2MgO
(d) Na2SO4 + BaCl₂ → BaSO4 + 2NaCl
Option c – 2Mg+O₂ → 2MgO
(a) the structure of atoms
(b) the electronic configuration of elements
(c) the periodic table
(d) All of the above
Option d – All of the above
Who provides an explanation of valence based on the inertness of noble gases?
(a) Lewis
(b) Kssel-Lewis
(c) Langmuir
(d) Sidgwick & Powell
Option b – Kssel-Lewis
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