Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

 Que- Rutherford bombarded _________________ particles in discovery of nucleus? 

a. Gamma-rays  

b. Alpha-rays  

c. Beta-rays  

d. X-rays 

Answer- Alpha-rays

Que- The maximum number of orbitals present in a subshell that is represented by Azimuthal quantum number = 3 will be________________? 

a. 1  

b. 3  

c. 5  

d. 7 

Answer- 7

Que- Pfund series are produced in the spectrum of hydrogen atom__________________? 

a. when electrons jump down to 2nd- orbit  

b. when electrons jump down to 3rd- orbit  

c. when electrons jump down to 4th- orbit  

d. when electrons jump down to 5th- orbit 

Answer- when electrons jump down to 5th- orbit

Que- Sommerfelds modification in Bohrs model is_______________? 

a. Orbit is cylindrical  

b. Orbit is elliptical  

c. Orbit is longitudinal  

d. Orbit is asymmetrical 

Answer- Orbit is elliptical

Que- Wavelength of electron was verified by_________________? 

a. Moseley  

b. Davisson and Germer  

c. Einstein  

d. Roentgen 

Answer- Davisson and Germer

Que- Quantum number which tells the energy of electron is________________? 

a. n  

b. 1  

c. m  

d. s 

Answer- n

Que- _______________ can expel proteons from paraffins ? 

a. Electron  

b. Positron  

c. Neutron  

d. None of above has such capability 

Answer- Neutron

Que- Centrifugal forces are balanced in atom by__________________? 

a. Attractive forces  

b. Repulsive force  

c. Electrons  

d. Neutrons 

Answer- Attractive forces

Que- When 6d orbital is complete the entering electron goes into_________________? 

a. 7f  

b. 7s  

c. 7p  

d. 7d 

Answer- 7p

Que- Neutrons moving with an energy of 1.2 MeV are called_______________? 

a. Fast neutrons  

b. Slow neutrons  

c. Moderate neutrons  

d. All are possible 

Answer- Fast neutrons

Que- Which of the following way in used for classification of chromatography ? 

a. Shape  

b. Phase  

c. Mechanism  

d. All 

Answer- All

Que- Which of the following technique is used for the separation of insoluble particles from liquids ? 

a. Filtration  

b. Crystallization  

c. Solvent extraction  

d. Chromatography 

Answer- Filtration

Que- Fluted filter paper is used to__________________? 

a. Filter hot solution  

b. Avoid premature crystallization  

c. Increase the rate of filtration  

d. Decrease the area 

Answer- Increase the rate of filtration

Que- A substance having very high vapour pressure at its melting point on heating will show_______________? 

a. Melting  

b. Sublimation  

c. Decomposition  

d. Condensation 

Answer- Sublimation

Que- A technique of partition chromatography in which the solvent is in a pool at the bottom of container_______________? 

a. Adsorption chromatography  

b. Ascending chromatography  

c. Radial chromatography  

d. Descending chromatography 

Answer- Ascending chromatography

Que- Branch of chemistry that deals with the complete qualitative and quantitative analysis of a substance is___________________? 

a. Stoichio chemistry  

b. Physical chemistry  

c. Analytical chemistry  

d. Quantum chemistry 

Answer- Analytical chemistry

Que- Estimation of amounts of different components in a sample is________________? 

a. Quantitative analysis  

b. Qualitative analysis  

c. Stochiometery  

d. Physical chemistry 

Answer- Quantitative analysis

Que- The solid which is left over the filter paper as a result of filtration_________________? 

a. Insoluble particles  

b. residue  

c. crystals  

d. mud 

Answer- residue

Que- Gooch Crucibles are made up of________________? 

a. plastic  

b. fibre  

c. porcelain  

d. steel 

Answer- porcelain

Que- Sintered crucible is made up of________________? 

a. Plastic  

b. glass  

c. porcetain  

d. fiber 

Answer- glass

Que- Separation of a solid from its hot saturated solution by cooling is called__________________? 

a. vapourization  

b. solvent extraction  

c. filtration  

d. crystallization 

Answer- crystallization

Que- Which of the following technique is simple and efficient to purify a substance____________________? 

a. Filtration  

b. Sublimation  

c. Crystallization  

d. Solvent extraction 

Answer- Solvent extraction

Que- 95% ethanol is called_________________? 

a. methylated spirit  

b. wood spirit  

c. rectified spirit  

d. absolute alcohol 

Answer- rectified spirit

Que- Ratio of the amount of solute in organic and aqueous solvent is________________? 

a. Retardation factor  

b. Distribution co-efficient  

c. Distribution in aqueous solution  

d. All statements are wrong 

Answer- Distribution co-efficient

Que- Animal charcoal adsorbs the coloured_________________? 

a. impurities  

b. crystals  

c. solvents  

d. both A & B 

Answer- impurities

Que- Crystallization does not involve_______________? 

a. heating  

b. sublimation  

c. cooling  

d. vaporization 

Answer- sublimation

Que- In CCI4 I2 shows________________? 

a. Red colour  

b. Purple colour  

c. Blue colour  

d. Yellow colour 

Answer- Purple colour

Que- Direct conversion of solids into vapours is called ___________________? 

a. Solvent extraction  

b. sublimation  

c. crystallization  

d. vaporization 

Answer- sublimation

Que- Without suction pump filtration is __________________? 

a. Fast process  

b. Slow process  

c. Rapid process  

d. All are possible 

Answer- Slow process

Que- The use of CaCl2 and PCl5 in the process of crystallization is as a____________________? 

a. oxidizing agent  

b. reducing agent  

c. drying agent  

d. colouring agent 

Answer- drying agent

Que- In solvent extraction ether is used to separate products of organic synthesis from________________? 

a. water  

b. iodine  

c. hydrochloric acid  

d. gases 

Answer- water

Que- In crystallization if the solvent is inflammable then direct heating is________________? 

a. needed  

b. avoided  

c. depends on temperature  

d. crystallization does not involve heating 

Answer- avoided

Que- Rate of filtration can be increased by applying gentle suction______________? 

a. Gooch crucible  

b. Filter paper  

c. Sintered crucible  

d. All of the above 

Answer- Filter paper

Que- Size of filter paper is selected according to the amount of__________________? 

a. solution  

b. amount of insoluble solute  

c. amount of soluble solute  

d. Amount of solvent 

Answer- amount of insoluble solute

Que- The tip of funnel should touch the wall of the breaker in order to avoid____________________? 

a. Inconsistent flow of filtration  

b. splashing  

c. premature crystallization  

d. all of above 

Answer- splashing

Que- The technique used to separate components of mixture in solid phase ? 

a. Crystallization  

b. Filtration  

c. Sublimation  

d. Solvent extraction 

Answer- Sublimation

Que- Identification of the components of a sample is_________________? 

a. Quantitative analysis  

b. Qualitative analysis  

c. Stoichiometry  

d. Physical chemistry 

Answer- Qualitative analysis

Que- Different components of a mixture have different Rf values due to________________? 

a. Polar solvent used  

b. Combination of solvents used  

c. Their different distribution coefficients in the solvent  

d. Distributive law 

Answer- Their different distribution coefficients in the solvent

Que- A process controlled by Distributive law is__________________? 

a. Crystallization  

b. Sublimation  

c. Solvent extraction  

d. Filtration 

Answer- Solvent extraction

Que- Safe and the most reliable method of drying crystals is through_________________? 

a. Filter paper  

b. Vacuum desiccators  

c. Oven  

d. None of these 

Answer- Vacuum desiccators

Que- Silica gel and alumina are used as __________________? 

a. Mobile phase  

b. Stationary phase  

c. Mixed phase  

d. Single phase 

Answer- Stationary phase

Que- The solvent or mixture of solvents used for separation of compounds is called____________________? 

a. Stationary phase  

b. Mobile phase  

c. Dynamic phase  

d. Static phase 

Answer- Mobile phase

Que- Sintered glass is a porous material used for ___________________? 

a. absorption  

b. adsorption  

c. filtration  

d. sublimation 

Answer- filtration

Que- Which is not related pair of term used in analytical techniques________________? 

a. Filtrate residue  

b. Sublimate sublimation  

c. Drying desiccator  

d. Separating funnel mother liquor 

Answer- Sublimate sublimation

Que- The major steps involved in complete quantitative analysis are _________________? 

a. 2  

b. 3  

c. 4  

d. 5 

Answer- 4

Que- Selection of filter paper depends on size of particles to be________________? 

a. filtered  

b. dried  

c. decolorized  

d. decanted 

Answer- filtered

Que- Which is not a sublime material_______________? 

a. Iodine  

b. Benzoic acid  

c. Ammonium chloride  

d. Potash alum 

Answer- Potash alum

Que- Shaking two immiscible liquids increases_________________? 

a. Length of contact  

b. Volume of contact  

c. Area of contact  

d. all of above 

Answer- Area of contact

Que- The ionization energy__________________? 

a. Generally increases from left to right in a period  

b. Does not change in a period  

c. Increase from top to bottom in a group  

d. Does not change in a group 

Answer- Generally increases from left to right in a period

Que- Which type of bond is formed by overlap of p orbitals _______________? 

a. Pi  

b. Sigma  

c. Both  

d. Neither 

Answer- Both

Que- The octet rule does not always hold for which of the following elements _________________? 

a. C  

b. O  

c. F  

d. P 

Answer- P

Que- Which of the following is the best explanation that CO2 is non polar molecule __________________? 

a. Linear geometry  

b. Dipole moment is zero  

c. Sp hybridization  

d. None 

Answer- Dipole moment is zero

Que- Which one is not the absolute term of the element _________________ ? 

a. Ionization energy  

b. Electron affinity  

c. Electro negativity  

d. Atomic size 

Answer- Electro negativity

Que- In O2 each oxygen atom is hybridized_________________? 

a. sp3  

b. sp2  

c. sp  

d. All 

Answer- sp2

Que- Measurement of the degree of polarity is___________________? 

a. Electron affinity  

b. Ionic character  

c. Ionization energy  

d. Dipole moment 

Answer- Dipole moment

Que- A specie with maximum number of unpaired electrons ? 

a. F  

b. H2O  

c. HF  

d. NH-2 

Answer- NH-2

Que- Force responsible to hold atoms together in a compound is called ________________? 

a. Bond  

b. Attractive force  

c. Interaction  

d. All of above represent same entity 

Answer- Bond

Que- In a period the atomic radius ? 

a. Increases  

b. Decreases  

c. Remain same  

d. First decreases then increases 

Answer- Decreases

Que- Energy required to remove electron from an atom______________? 

a. Ionization potential  

b. Electronegativity  

c. Electron affinity  

d. Activation energy 

Answer- Ionization potential

Que- Greater shielding effect corresponds to ionization energy value___________________? 

a. Greater  

b. Lesser  

c. Remain same  

d. No effect 

Answer- Lesser

Que- Energy released or absorbed when electrons are added in atom is_________________? 

a. Ionization potential  

b. Electronegativity  

c. Electron affinity  

d. Activation energy 

Answer- Electron affinity

Que- Elements of group IA IIA are _________________? 

a. Electronegative  

b. Electropositive  

c. Neutral  

d. IA is electropositive while IIA is electronegative 

Answer- Electropositive

Que- Mostly ionic compound are produced in between elements of_________________? 

a. IA and VIA  

b. IA IIA and VIIA  

c. IB and VIIB  

d. IA and IB 

Answer- IA IIA and VIIA

Que- The Lewis acids are__________________? 

a. Electron deficient  

b. Electron rich  

c. Octet is complete  

d. No such acids exist 

Answer- Electron deficient

Que- The geometry of ammonia is___________________? 

a. Tetrahedral  

b. Square planner  

c. Trigonal bipyramidal  

d. Trigonal Pyramidal 

Answer- Trigonal Pyramidal

Que- By combining n atmic orbitals no. of hybrid orbitals will be__________________? 

a. 2n  

b. n  

c. 3n  

d. impossible to predict 

Answer- n

Que- Geometry of simple molecule having sp3 hybrid orbital is ___________________? 

a. Triangular  

b. Tetrahedral  

c. Square planner  

d. Linear 

Answer- Tetrahedral

Que- Pi bonds are produced by overlapping of__________________? 

a. Un-hybrid orbitals  

b. Hybrid orbitals  

c. Hybrid and un hybrid orbitals  

d. atomic orbital and hybrid orbital 

Answer- Un-hybrid orbitals

Que- Molecular orbital which have higher energy than atomic orbitals is called___________________? 

a. Bonding molecular orbital  

b. Antibonding molecular orbital  

c. Hybrid orbital  

d. Super atomic orbital 

Answer- Antibonding molecular orbital

Que- Bond order for N2 molecule is __________________? 

a. 2  

b. 1  

c. 3  

d. 4 

Answer- 3

Que- Unit of dipole moment is_________________? 

a. Debye  

b. Poise  

c. Pascal  

d. Newton 

Answer- Debye

Que- The relative attraction of the nucleus for the electrons in a chemical bond is called _________________? 

a. Ionization energy  

b. Electron affinity  

c. Electro negativity  

d. None of the above 

Answer- Electro negativity

Que- Which of the following will have highest value of electron affinity_________________? 

a. F  

b. Cl  

c. Br  

d. I 

Answer- Cl

Que- Which of the solid does not contain covalent bond________________? 

a. Copper  

b. Ice  

c. Diamond  

d. Graphite 

Answer- Copper

Que- Shielding effect across the period ________________? 

a. Increases  

b. Decreases  

c. Constant  

d. None 

Answer- Constant

Que- Which one has maximum number of unpaired electrons ? 

a. 6X  

b. 7Y  

c. 9Z  

d. 13W 

Answer- 7Y

Que- Molecular orbitals are filled according to _________________? 

a. Auf bau principle  

b. Hunds rule  

c. Paulis Exclusion principle  

d. All these 

Answer- All these

Que- Which one shows high %age of the ionic character ? 

a. H2O  

b. HF  

c. HCI  

d. HBr 

Answer- HF

Que- Which of the following have their outer most shell complete in atomic form ? 

a. Noble gases  

b. Alkali metals  

c. Coinage metals  

d. Gun metals 

Answer- Noble gases

Que- Energy of atom in compound is___________________? 

a. Higher than individual  

b. Lesser than individual  

c. No change  

d. Impossible to predict 

Answer- Lesser than individual

Que- An atom loses or gains electrons to__________________? 

a. Gain stability  

b. Form a bond  

c. Complete its outermost shell  

d. all are accurate justifications 

Answer- all are accurate justifications

Que- In a group ionic radius ? 

a. Increases  

b. Decreases  

c. No change  

d. Variable trend 

Answer- Increases

Que- Ionization energy in a period generally ___________________? 

a. Increases  

b. Decreases  

c. No change  

d. Variable trend 

Answer- Increases

Que- Elements having high I.P values are____________________? 

a. Metals  

b. Non metals  

c. Liquids  

d. Solids 

Answer- Non metals

Que- In a period electronegativity from left to right_________________? 

a. Increases  

b. Decreases  

c. Remain constant  

d. Variable trend 

Answer- Increases

Que- Ionic bond is produced after complete transfer of ________________ ? 

a. Nucleus  

b. Neutrons  

c. Electrons  

d. Protons 

Answer- Electrons

Que- Bond will beionic when E.N difference of bonded atom is ____________________? 

a. Equal to 1.7  

b. Greater than 1.7  

c. Less than 1.7  

d. No specificity exists 

Answer- Greater than 1.7

Que- Which one of the following has polar covalent bond ? 

a. HF  

b. CH4  

c. H2  

d. N2 

Answer- HF

Que- Sharing of 1 electron pair by one specie forms_________________? 

a. Single covalent bond  

b. Hydrogen bond  

c. Double covalent bond  

d. Coordinate covalent bond 

Answer- Coordinate covalent bond

Que- Orbitals of same energy produced after mixing of orbitals of different energy are called __________________? 

a. Degenerate orbitals  

b. Generate orbitals  

c. Hybrid orbitals  

d. Zeeman orbitals 

Answer- Degenerate orbitals

Que- Geometry of molecule will be pyramidal if the outer post shell of the central atom has___________________? 

a. 3 bond pair one lone pair  

b. 2 bond pair 2 lone pair  

c. 1 bond pair 3 lone pair  

d. 3 lone pair 1 bond pair 

Answer- 3 bond pair one lone pair

Que- According to VESPR Model the geometry of molecule having 5 bond pair in outer most shell will be __________________? 

a. Triangular  

b. Square planner  

c. Trigonal bipyramidal  

d. Octahedral 

Answer- Trigonal bipyramidal

Que- Unpaired electron in a molecule gives ______________ character ? 

a. Ferromagnetic  

b. Paramagnetic  

c. Diamagnetism  

d. Both A & B 

Answer- Paramagnetic

Que- Product of charge and distance is called__________________? 

a. Pressure  

b. Bond length  

c. Work  

d. Dipole moment 

Answer- Dipole moment

Que- on sp3 hybridization ________________? 

a. All p-orbitals are involved  

b. One s and 3 p-orbitals are involved  

c. one p-orbital is involved  

d. four p-orbitals are involved 

Answer- One s and 3 p-orbitals are involved

Que- Which state of matter has the lowest density ? 

a. Gas  

b. Liquid  

c. Solid  

d. Plasma 

Answer- Gas

Que- The solid particles only posses_____________________? 

a. Translational motion  

b. Vibrational motion  

c. Rotational motion  

d. All of above motions 

Answer- Vibrational motion

Que- If 1/V is plotted on X-axis and pressure on Y-axis at constant temperature what should appear ________________? 

a. Straight line parallel to x-axis  

b. Straight line parallel to y-axis  

c. Straight line  

d. Curve 

Answer- Straight line

Que- One mole of an ideal gas at 546.5 K under 2 atm pressure has a volume of________________? 

a. 22.414 m3  

b. 44.828 dm3  

c. 22.414 dm3  

d. 11.212 cm3 

Answer- 22.414 dm3

Que- Which one is not the partial pressure of oxygen in the lungs ? 

a. 0.1526 atm  

b. 116 mm of Hg  

c. 116 torr  

d. 1 atm 

Answer- 1 atm

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