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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 of the following pairs of molecules have permanent dipole moments in both?
(a) NO₂ and CO₂
(b) NO₂ and O₃
(c) SiF₄ and CO₂
(d) SiF₄ and NO₂
Option b – NO₂ and O₃
Which statement(s) represent a misunderstanding about resonance? (i) A molecule exists partially as different canonical structures over time. (ii) Canonical forms are not real entities. (iii) There is no equilibrium among canonical forms.
(a) (i) only
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (iii) only
Option a – (i) only
Which molecule listed below has the greatest dipole moment?
(a) CCl₄
(b) NH₃
(c) H₂O
(d) CHCl₃
Option c – H₂O
What is the cause of light production in fireflies?
(a) A radioactive material
(b) Chemiluminescence
(c) Photoelectric effect
(d) Combustion of phosphorus
Option b – Chemiluminescence
Which of the following demonstrates light production as a result of a chemical reaction?
(a) Sun
(b) Moon
(c) Electric bulb
(d) Lightning and thunder
Option a – Sun
Which pair forms the strongest ionic bond?
(a) Na and Cl
(b) Mg and F
(c) Li and F
(d) Na and F
Option b – Mg and F
Which of these molecules has no dipole moment?
(a) CH₃Cl
(b) NF₃
(c) BF₃
(d) ClO₂
Option c – BF₃
Among the following, which bond is the most polar?
(a) C–F
(b) C–O
(c) C–Br
(d) C–S
Option a – C–F
What type of bond exists in a hydrogen chloride molecule?
(a) Polar covalent bond
(b) Double bond
(c) Coordinate bond
(d) Ionic bond
Option a – Polar covalent bond
Which technique can be used to determine bond length?
(a) X-ray diffraction
(b) Electron diffraction
(c) Spectroscopy
(d) All of these
Option d – All of these
What term is used for the radius measured when an atom’s core touches that of a bonded neighboring atom?
(a) van der Waals radius
(b) Bond length
(c) Covalent radius
(d) Ionic radius
Option c – Covalent radius
What effect does a positive catalyst have on a chemical reaction?
(a) Speeds up the reaction
(b) Slows down the reaction
(c) Enhances the product yield
(d) Improves product purity
Option c – Enhances the product yield
In a dry cell, what form of energy is transformed into electricity?
(a) Chemical energy
(b) Thermal energy
(c) Mechanical energy
(d) Nuclear energy
Option a – Chemical energy
Which of the following is a chemical change?
(a) Paper burning
(b) Iron becoming magnetic
(c) Sugar dissolving in water
(d) Water turning into ice
Option a – Paper burning
A bottle containing water is opened on the Moon. What is most likely to happen?
(a) It freezes
(b) It boils
(c) It splits into hydrogen and oxygen
(d) It remains unchanged
Option a – It freezes
Who coined the term “covalent bond”?
(a) Lewis
(b) Langmuir
(c) Nyholm and Gillespie
(d) Heitler and London
Option b – Langmuir
What name is given to the bond formed by attraction between oppositely charged ions?
(a) Chemical bond
(b) Electrovalent bond
(c) Coordinate bond
(d) Covalent bond
Option b – Electrovalent bond
When a metal reacts with a non-metal, the non-metal atom usually:
(a) Loses electrons and becomes smaller
(b) Loses electrons and becomes larger
(c) Gains electrons and becomes smaller
(d) Gains electrons and becomes larger
Option d – Gains electrons and becomes larger
Which of the following combinations will lead to the formation of an ionic bond?
(a) Phosphorus and Chlorine
(b) Ammonia and Boron trifluoride
(c) Hydrogen and Calcium
(d) Hydrogen and Sulphur
Option c – Hydrogen and Calcium
A stainless steel container holds argon gas at pressure P and temperature T, with n atoms present. If replaced with carbon dioxide at the same temperature, and the number of molecules is halved, what will be the new pressure?
(a) P
(b) 2P
(c) P/2
(d) P/4
Option c – P/2
Which reaction among the following produces nitric oxide (NO) as one of the products?
(a) 3Cu + 8HNO₃ (dilute) →
(b) Cu + 4HNO₃ (concentrated) →
(c) 4Zn + 10HNO₃ (dilute) →
(d) Zn + 4HNO₃ (concentrated) →
Option a – 3Cu + 8HNO₃ (dilute) →
Which of the reactions below is a redox 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
The development of theories related to valence and chemical bonding has progressed alongside which of the following?
(a) Atomic structure studies
(b) Understanding of electronic configurations
(c) Evolution of the periodic table
(d) All of the above
Option d – All of the above
Who explained the concept of valency based on noble gas stability?
(a) Lewis
(b) Kossel–Lewis
(c) Langmuir
(d) Sidgwick and Powell
Option b – Kossel–Lewis
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