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Chemistry Multiple Choice Questions And Answers
Q.1: Pi bonds are produced by overlapping of-------- ?
- Un-hybrid orbitals
- Hybrid orbitals
- Hybrid and un hybrid orbitals
- atomic orbital and hybrid orbital
A
Q.2: Which is not related pair of term used in analytical techniques----------- ?
- Filtrate residue
- Sublimate sublimation
- Drying desiccator
- Separating funnel mother liquor
B
Q.3: Unpaired electron in a molecule gives ---------- character ?
- Ferromagnetic
- Paramagnetic
- Diamagnetism
- Both A AND B
B
Q.4: The scientist who did not contribute in the construction of periodic table ?
- Al-Razi
- Moseley
- Dobereiner
- Democritus
D
Q.5: Which of the following ion is stable in aqueous solution ?
- H+
- H-
- Cl-
- All are stable
C
Q.6: The introduction of Kelvin scale in thermodynamic is according to--------- ?
- Boyles law
- Charles law
- Daltons law
- Grahams law
B
Q.7: Molecular orbitals are filled according to -------- ?
- Auf bau principle
- Hunds rule
- Paulis Exclusion principle
- All these
D
Q.8: The atoms of same element having same atomic number but different mass number are called------------ ?
- Isobars
- Isomers
- Isotopes
- Isotropes
C
Q.9: Unit of dipole moment is---------- ?
- Debye
- Poise
- Pascal
- Newton
A
Q.10: Melting points of VII-A group elements down the group ---------- ?
- Increase
- Decrease
- Remain constant
- No regular trend
A
Q.11: In a period electronegativity from left to right-------- ?
- Increases
- Decreases
- Remain constant
- Variable trend
A
Q.12: Amphoteric exides are those which possess ------------ properties ?
- Acidic
- Basic
- Acidic and basic
- Neutral and acidic
C
Q.13: Under what conditions the gases deviate from the ideal behavior ?
- High temperature
- Low temperature
- High pressure
- B and C
D
Q.14: Which discovery caused a revision in the periodic law as stated by Mendeleev ?
- Location of nucleus by Rutherford
- Atomic number by Moseley
- X-rays by Roentgen
- Natural radioactivity by Henry Bacquerel.
B
Q.15: Ionic bond is produced after complete transfer of ---------- ?
- Nucleus
- Neutrons
- Electrons
- Protons
C
Q.16: Which one has the lowest density at room temperature ?
- Ne
- N2
- NH3
- CO
C
Q.17: Addition of 2nd electron to a uni negative ion is always---------- ?
- Exothermic
- Endothermic
- Data is insufficient
- Unpredictable
B
Q.18: Ionization energy depends upon---------- ?
- Nuclear charge
- Atomic size
- Shielding effect
- I.E depends upon all of the above and nature of orbital
D
Q.19: Orbitals of same energy produced after mixing of orbitals of different energy are called ---------- ?
- Degenerate orbitals
- Generate orbitals
- Hybrid orbitals
- Zeeman orbitals
A
Q.20: Greater shielding effect corresponds to ionization energy value----- ?
- Greater
- Lesser
- Remain same
- No effect
B
