Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

 Que-  Which of the following statement is correct 

a. size of Cl atoms > Cl- ion 

b. size of Na+ ion < Na atom

c. size of Na atom < Na+ ion 

d. Cl- < Na+ 


Answer- size of Na+ ion < Na atom


Que-  Which of the following is mineral fibre. 

a. teflon 

b. asbestos 

c. saran 

d. acrylic 


Answer- asbestos


Que-  Which catalyst is used in contact process? 

a. Fe2O3 

b. V2O5 

c. SO3 

d. Ag2O 


Answer- V2O5


Que-  The hardest of the following solids is 

a. sodium 

b. diamond 

c. graphite 

d. magnesium 


Answer- diamond


Que-  Which of the following elements has greater 1st ionization energy 

a. "B" 

b. "C" 

c. "N" 

d. "O" 


Answer- "N"


Que-  Which of the solid does not contain covalent bond 

a. copper 

b. ice 

c. diamond 

d. graphite 


Answer- copper


Que-  Which of the following molecule is polar 

a. CCI4 

b. CO2 

c. BF3 

d. none of the above 


Answer- none of the above


Que-  Which of the following theories is superior to others 

a. VSEPR 

b. VBT 

c. MOT 

d. none of the above 


Answer- MOT


Que-  Which of the following is not characteristics of reversible reaction 

a. whole amount of reactant does not change into product 

b. chemical equilibrium is established 

c. a catalyst changes the direction of reaction 

d. rate of forward reaction decreases as reaction proceeds 


Answer- a catalyst changes the direction of reaction


Que-  Which of the following points are important in connection with equilibrium constant. 

a. Kc is constant at given temperature 

b. Kc is unaffected by change in concentration of reactants or products 

c. Kc indicates the extent of reaction but not about the rate of reaction. 

d. All of the above 


Answer- All of the above


Que-  A solution has pH = 0 its H+ ion concentration is 

a. 1 x 10-1 

b. 1 x 10-14 

c. 1 x 10-7 

d. 1 


Answer- 1


Que-  Solubility of CaF2 is 2.0x10-4 gdm-3 then Ksp of CaF2 is 

a. 0 x 10-8 

b. 2 x 10-11 

c. 0 x 10-8 

d. 0 x 10-12 


Answer- 2 x 10-11


Que-  1 mole of electron has mass in microgram 

a. 008 x 10-3 

b. 5 x 10-4 

c. 84 x 10-4 

d. 673 x 10-3 


Answer- 5 x 10-4


Que-  The unit of molality is 

a. moles dm-3 

b. moles kg-1 

c. gram dm-3 

d. none 


Answer- moles kg-1


Que-  The use of antifreeze in the automobile radiator is an important application of 

a. constitutive property 

b. additive property 

c. colligative property 

d. intrinsic property 


Answer- colligative property


Que-  A solution can be both 

a. dilute and concentrated 

b. dilute and saturated 

c. saturated and unsaturated 

d. saturated and super saturated 


Answer- dilute and concentrated


Que-  In which of the following type of reactions energy of reactant is greater than energy of product 

a. endothermic 

b. exothermic 

c. unpredictable 

d. same 


Answer- exothermic


Que-  Which of the following elements react with steam to produce H2 gas. 

a. Pd 

b. Ni 

c. Sn 

d. All of the above 


Answer- All of the above


Que-  The unit of the rate constant (k) is same as that of rate of reaction 

a. First order reaction 

b. Second order reaction 

c. Zero order reaction 

d. Third order reaction 


Answer- Zero order reaction


Que-  Which of the elements do not fall in stair case of the modern periodic table 

a. Si 

b. As 

c. Te 

d. None of the above 


Answer- None of the above


Que-  Acid present in acid rain may be 

a. H2SO4 

b. HNO3 

c. both a and b 

d. none of the above 


Answer- both a and b


Que-  Across short period the melting and boiling point increase upto 

a. IIIA group 

b. IVA group 

c. VA group 

d. VIA group 


Answer- IVA group


Que-  Which of the following elements conduct electricity and also melts below 100Degree Centigrade 

a. Aluminium 

b. Sodium 

c. Carbon 

d. Sulphur 


Answer- Sodium


Que-  Which of the following is the formula of chrome red. 

a. Pb3 O4 

b. 2Pb CO3 - Pb (OH)2 

c. Pb Cr O4 - Pb (OH)2 

d. Pb2O 


Answer- Pb3 O4


Que-  The compound which is added to leaded gasoline to save engine from lead oxide and lead sulphate deposits is 

a. Ethylene iodide 

b. Ethylene bromide 

c. Ethylene chloride 

d. Ethylene fluoride 


Answer- Ethylene bromide


Que-  Regular coiling or zigzagging of polypeptide through hydrogen bonding is its 

a. Quantum structure 

b. Secondary structure 

c. Tertiary structure 

d. Primary structure 


Answer- Secondary structure


Que- The soul of chemistry is dealing with___________? 

a. Internal structural changes in matter  

b. Composition of matter  

c. Properties of matter  

d. Composition and properties of matter 


Answer- Composition and properties of matter


Que- The radioactive isotope of hydrogen is called___________? 

a. tritium  

b. deuterium  

c. protium  

d. ortho-hydrogen 


Answer- tritium


Que- Electron was discovered by? 

a. Michael Faraday  

b. James Maxwell  

c. Yuri Gagarin  

d. J.J Thomson 


Answer- J.J Thomson


Que- Sodium carbonate is produced by____________? 

a. haber process  

b. Amonia solvay process  

c. decons process  

d. lead chamber process 


Answer- Amonia solvay process


Que- Which of the following is a substance? 

a. Sea water  

b. Brass  

c. Tape water  

d. Graphite E. Sand 


Answer- Graphite


Que- Some substances are good conductor of electricity in both the solid and liquid states. These substances are generally______________? 

a. ionic substances  

b. metallic substances  

c. molecular solids  

d. covalent network solids 


Answer- metallic substances


Que- All of the following substances are crystalline except_____________? 

a. Ice  

b. Diamond  

c. Sucrose  

d. Plastic 


Answer- Plastic


Que- Covalent network crystals have_____________? 

a. higher melting point then molecular crystals  

b. lower melting point then molecular crystals  

c. discrete molecules linked by Van der waals forces  

d. hydrogen bonding 


Answer- higher melting point then molecular crystals


Que- What is a mixture of Potassium Nitrate Powdered Charcoal and Sulphur called? 

a. Paint  

b. Glass  

c. Gun Powder  

d. Cement 


Answer- Gun Powder


Que- Diameter of an atom is in the order of________________? 

a. 0.2m  

b. 0.2mm  

c. 0.2nm  

d. 0.2pm 


Answer- 0.2nm


Que- Mass spectrometer is used to determine Mass number of isotopes and___________________? 

a. Atomic number  

b. Relative abundance  

c. Electronic configuration  

d. All of the above 


Answer- Relative abundance


Que- The number of peaks obtained in mass spectrometry shows____________________? 

a. Relative abundance  

b. Average mass of element  

c. Number of isotopes  

d. Relative isotopic mass 


Answer- Number of isotopes


Que- Empirical formula of chloroform is____________________? 

a. CH2 C12  

b. CH3C1  

c. CC14  

d. CHCL3 Read More Details about this Mcq 


Answer- CHCL3


Que- Molecular mass of water (18g) means__________________? 

a. 1-mole molecules of water  

b. 1-gram molecule of water  

c. 3-gram atoms  

d. all 


Answer- all


Que- Which of the following statements about isotopes is correct ? 

a. Isotopes with odd atomic number are abundant  

b. Isotopes with odd atomic number and even mass number are abundant  

c. Isotopes with even atomic number and even mass number are abundant  

d. Isotopes with even atomic number and odd mass no are abundant 


Answer- Isotopes with even atomic number and even mass number are abundant


Que- The number of isotopes of elements with even mass number and even atomic number are ________________? 

a. 280  

b. 300  

c. 154  

d. 54 


Answer- 154


Que- Which of the following terms is not used for ionic compound ? 

a. formula unit  

b. empirical formula  

c. molecular formula  

d. formula mass 


Answer- molecular formula


Que- moles of each aluminium and oxygen react with each other to produce aluminium oxide. The amount of product formed is______________________? 

a. 0.18 mole  

b. 0.27 mole  

c. 0.24 mole  

d. 0.09 mole 


Answer- 0.18 mole


Que- Which one of the following has the maximum number of isotopes ? 

a. oxygen  

b. carbon  

c. tin  

d. chlorine 


Answer- tin


Que- 1 a.m.u =__________________? 

a. 1.6 x 10-27 kg  

b. 1.6 x 10-24 kg  

c. 1.6 x 10-26 kg  

d. 1.6 x 10-28 kg 


Answer- 1.6 x 10-27 kg


Que- Which of the following are isoelectronic species ? 

a. H+ H H-  

b. Li+ Na+ K+  

c. C1- Br- I  

d. F- Ne Na+ 


Answer- F- Ne Na+


Que- Molecular ions are formed by passing______________________? 

a. High energy electron beam  

b. ? – particle  

c. X-rays  

d. All of the above 


Answer- All of the above


Que- Which one is true about isotope ? 

a. Same number of neutrons  

b. Same mass number  

c. Same physical properties  

d. Same chemical properties 


Answer- Same chemical properties


Que- Which of the following ion formation is always exothermic ? 

a. Uni-negative  

b. Uni-positive  

c. Di-negative  

d. Di-positive 


Answer- Uni-negative


Que- The sample of isotopes of an element which needs not to be vaporized in the vaporization chamer_________________? 

a. Gas  

b. Liquid  

c. Volatile solid  

d. All 


Answer- Gas


Que- Avogadros number may represent_________________? 

a. volume of particles  

b. number of particles  

c. mass of particles  

d. All of the above 


Answer- All of the above


Que- Size of molecule depends upon________________? 

a. Atomicity  

b. Shape of molecule  

c. Both A and B  

d. Difficult to predict 


Answer- Both A and B


Que- Which of the following terms is used for the mass of chlorine 35.5 ? 

a. relative atomic mass  

b. mass number  

c. atomic weight  

d. relative isotopic mass 


Answer- relative atomic mass


Que- Which one of the following is not the mono isotopic element ? 

a. arsenic  

b. uranium  

c. iodine  

d. nickel 


Answer- uranium


Que- The mass of decimole of electrons (NA) is___________________? 

a. 1.008 mg  

b. 0.184 mg  

c. 0.054 mg  

d. 5.4 mg 


Answer- 0.054 mg


Que- Which of the following statements is wrong about isotopes ? 

a. they possess different mass number  

b. they possess different physical properties  

c. they possess same chemical properties  

d. they possess different position in the periodic table 


Answer- they possess different position in the periodic table


Que- Qualitative analysis is carried out for _________________? 

a. identification of elements  

b. estimation of amounts of elements  

c. molar ration of elements  

d. molar volume of elements 


Answer- identification of elements


Que- Combustion analysis is performed to determine__________________? 

a. Empirical formula  

b. Molecular mass  

c. Molecular formula  

d. Formula mass 


Answer- Empirical formula


Que- Isotopes differ in_________________? 

a. properties which depend upon mass  

b. arrangement of electrons in orbitals  

c. chemical properties  

d. all of the above 


Answer- properties which depend upon mass


Que- Which of the following methods is used to estimate hydrogen in an organic compound ? 

a. Combustion method  

b. Dumas method  

c. Kjeldahls method  

d. All of the above methods are for different purposes 


Answer- Combustion method


Que- The nucleus of an atom of every element will always contain____________________? 

a. neutrons  

b. protons and electrons  

c. protons   

d. protons and neutrons 


Answer- protons 


Que- When 0.5 mole of phosphoric acid is dissolved in aqueous solution how many moles of -ve and +ve ions are collected altogether ? 

a. 0.5  

b. 1  

c. 1.5  

d. 2 


Answer- 2


Que- Dempsters mass spectrometer has number of zones / parts_________________? 

a. 5  

b. 4  

c. 3  

d. 2 


Answer- 5


Que- All the following variables are used to describle gases except__________________? 

a. pressure  

b. volume  

c. moles  

d. density 


Answer- density


Que- Methyl alcohol is not used as___________________? 

a. a solvent  

b. an anti freezing agent  

c. a substitute for petrol  

d. for denaturing of ethyl alcohol 


Answer- a substitute for petrol


Que- Oxygen (molecular weight = 32) diffuses at a rate of 10cm3/min under the same conditions of temperature and pressure how fast will hydrogen (molecular weight = 2) diffuse ? 

a. 20cm3/min  

b. 40cm3/min  

c. 160cm3/min  

d. 2.5cm3/min 


Answer- 40cm3/min


Que- As a substance moves from a solid to a liquid all of the following changes occur except ? 

a. molecules become more disordered.  

b. K.E of the molecules decreases  

c. intermolecular forces become weaker.  

d. molecules move more frequently. 


Answer- K.E of the molecules decreases


Que- The rectified spirit is________________? 

a. 12% alcohol  

b. 90% alcohol  

c. 95% alcohol  

d. 100% alcohol 


Answer- 95% alcohol


Que- Which of the following solids show anisotropy___________________? 

a. Plastic  

b. Glass  

c. Rubber  

d. None of the above 


Answer- None of the above


Que- Butyl chloride gives possible isomers ? 

a. 2  

b. 3  

c. 4  

d. 5 


Answer- 4


Que- Metallic crystals are soluble in________________? 

a. Polar solvent  

b. Non polar solvent  

c. Fused metal  

d. None 


Answer- Fused metal


Que- Paramagnetic behaviour of substance is measured by a balance called___________________? 

a. Analytical balance  

b. Guoys balance  

c. Electrical balance  

d. Single beam balance 


Answer- Guoys balance


Que- Which of the following properties prove that cathode rays are material in nature_________________? 

a. they cast shadow  

b. they possess momentum  

c. they are negatively charged  

d. all of the above 


Answer- they possess momentum


Que- When an electron is moving with velocity of 2.188 x 106 ms-1 in the first orbit of Bohrs model of hydrogen. The de Broglie wavelength of electron is______________? 

a. 0.33 nm  

b. 0.34 nm  

c. 0.35 nm  

d. 0.36 nm 


Answer- 0.33 nm


Que- 1 mole of electron has mass in microgram_________________? 

a. 1.008 x 10-3  

b. 5.5 x 10-4  

c. 1.84 x 10-4  

d. 1.673 x 10-3 


Answer- 5.5 x 10-4


Que- The use of antifreeze in the automobile radiator is an important application of__________________? 

a. constitutive property  

b. additive property  

c. colligative property  

d. intrinsic property 


Answer- colligative property


Que- At which electrode the reduction of the solution is occurring in Al-Ag cell_____________? 

a. A  

b. Ag  

c. Both  

d. Neither 


Answer- Ag


Que- In which of the following type of reactions energy of reactant is greater than energy of product________________? 

a. endothermic  

b. exothermic  

c. unpredictable  

d. same 


Answer- exothermic


Que- Which of following metals can be displaced by all other metals from its solution ? 

a. Ag  

b. A  

c. Au  

d. Cu 


Answer- Au


Que- Which of the elements do not fall in stair case of the modern periodic table__________________? 

a. Si  

b. As  

c. Te  

d. None of the above 


Answer- None of the above


Que- Across short period the melting and boiling point increase upto __________________? 

a. IIIA group  

b. IVA group  

c. VA group  

d. VIA group 


Answer- IVA group


Que- Which of the following is the formula of chrome red ? 

a. Pb3 O4  

b. 2Pb CO3 – Pb (OH)2  

c. Pb Cr O4 – Pb (OH)2  

d. Pb2O 


Answer- Pb3 O4


Que- Regular coiling or zigzagging of polypeptide through hydrogen bonding is its___________________? 

a. Quantum structure  

b. Secondary structure  

c. Tertiary structure  

d. Primary structure 


Answer- Secondary structure


Que- In the van der Waals equation (P + n2a / v2) (v – nb) = nRT which of the following statement is not true ? 

a. n2a/v correct for the intermolecular forces.  

b. nb correct for the volume occupied by gas molecules.  

c. at high densities the equation reduces to the ideal gas law  

d. all of the above statements are correct. 


Answer- at high densities the equation reduces to the ideal gas law


Que- The inhaled breath of diabetics patient contain acetone. A medical student wishes to test for diabetes by asking patient to bubble their breath through a reagent ? 

a. alkaline aquenous iodine  

b. aqueous bromine  

c. Fehling solution  

d. aqueous NaOH 


Answer- alkaline aquenous iodine


Que- When aquious bromine is added to aqueous phenol a creamy white ppt is obtained. What does this reaction show ? 

a. phenol is unsaturated  

b. 2-bromophenol is insoluble in water  

c. a hydroxy group makes the benzene ring more susceptible to electrophilic attack  

d. acid-base reaction 


Answer- a hydroxy group makes the benzene ring more susceptible to electrophilic attack


Que- If a graph is plotted between temperature on x-axis and volume on y-axis for 1 mole of gas then we get straight line which cuts the temperature exis at________________? 

a. 0?C  

b. 273.16K  

c. ?273.16 K  

d. ?273.16?C 


Answer- ?273.16?C


Que- Benzene is a good solvent for__________________? 

a. fats  

b. resins  

c. iodine  

d. all the above 


Answer- all the above


Que- Which of the following element doesnot show allotropy_________________? 

a. Carbon  

b. Arsenic  

c. Nitrogen  

d. Sulphur 


Answer- Nitrogen


Que- Purines and pyrimidines are_________________? 

a. Enzymes  

b. Nitrogenous bases  

c. Carbohydrates  

d. Lipids 


Answer- Nitrogenous bases


Que- All the transition elements show_________________? 

a. Similar physical properties  

b. Similar chemical properties  

c. Both A and b  

d. None 


Answer- None


Que- In solids the temperature is the measure of__________________? 

a. Average kinetic energy of molecules  

b. Vibrational kinetic energy  

c. Translational kinetic energy  

d. None of the above 


Answer- Vibrational kinetic energy


Que- Fruit juices and fizzy drinks such as lemonade are often sold in aluminium cans. What is the most important reason aluminium is a suitable metal ? 

a. aluminium can be recycled  

b. aluminium has very low density  

c. aluminium is the most abundant metal in the earth crust  

d. aluminium is resistant to corrosion by organic acids. 


Answer- aluminium is resistant to corrosion by organic acids.


Que- On heating aldehydes with Fehlings solution we get a precipitate whose colour is_________________? 

a. pink  

b. black  

c. yellow  

d. brick red 


Answer- brick red


Que- What is maximum number of electrons in an orbital with m (magnetic quantum number) = 3 ? 

a. 6  

b. 4  

c. 3  

d. 2 


Answer- 2


Que- Which catalyst is used in contact process ? 

a. Fe2O3  

b. V2O5  

c. SO3  

d. Ag2O 


Answer- V2O5


Que- Which of the following elements has greater 1st ionization energy__________________? 

a. B  

b. C  

c. N  

d. O 


Answer- N


Que- Which of the following molecule is polar__________________? 

a. CCI4  

b. CO2  

c. BF3  

d. none of the above 


Answer- none of the above


Que- Which of the following points are important in connection with equilibrium constant ? 

a. Kc is constant at given temperature  

b. Kc is unaffected by change in concentration of reactants or products  

c. Kc indicates the extent of reaction but not about the rate of reaction.  

d. All of the above 


Answer- All of the above

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