Chemistry MCQ (Multiple Choice Questions) - SchoolingAxis

Chemistry MCQ (Multiple Choice Questions)

 Que- Nucleic acids were first demonstrated in_________________? 

a. Pus cells  

b. Sperm heads 

c. 1872  

d. all of the above 

Answer- Pus cells

Que- The mechanism by which the genetic information can be duplicated is called_________________? 

a. Duplication  

b. Transcription  

c. Replication  

d. Mutation 

Answer- Replication

Que- The nitrogenous base different in RNA as compared to DNA is_________________? 

a. Cytosine  

b. Thymine  

c. Adenine  

d. Guanine 

Answer- Thymine

Que- A polymer in which three different monomers combine called_____________? 

a. Copolymer  

b. Terpolymer  

c. Homopolymer  

d. Biopolymer 

Answer- Terpolymer

Que- Polyester resins are the product of the reaction of__________________? 

a. Dihydric alcohol and dicarboxylic aromatic acids  

b. Polyamines with aliphatic dicarboxylic acids  

c. Styrene in the presence of catalyst  

d. Epichlorohydrin with diphenylol propane 

Answer- Dihydric alcohol and dicarboxylic aromatic acids

Que- Carbohydrates are polyhydroxy compounds of___________________? 

a. Glucose  

b. Glyceraldehydes  

c. Oligosaccharides  

d. Aldehydes and ketones 

Answer- Aldehydes and ketones

Que- Nylon is obtained by heating___________________? 

a. Acrylic acid  

b. Epichlorohydrin  

c. Vinyl chloride  

d. Adipic acid with hexamethylene diamine 

Answer- Adipic acid with hexamethylene diamine

Que- Amylose is__________________? 

a. Soluble in water  

b. Insoluble in water  

c. Soluble in alcohol  

d. Partially soluble in alcohol 

Answer- Soluble in water

Que- All proteins yield ___________ upon complete hydrolysis? 

a. Nitrogen  

b. Amino acids  

c. Carbon and hydrogen  

d. Sulphur 

Answer- Amino acids

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- Animal fats are located particularly in__________________? 

a. Skeleton tissues  

b. Cardiac tissues  

c. Connective tissues  

d. Adipose tissues 

Answer- Adipose tissues

Que- Lipopolysaccharides are examples of________________? 

a. Derived lipids  

b. Simple lipids  

c. Compound lipids  

d. Not a type of lipids 

Answer- Compound lipids

Que- Orgosterol is__________________? 

a. Orgocalciferol  

b. Vitamin D2  

c. Sterol  

d. all of the above 

Answer- Sterol

Que- Enzynies that catalyze the transfer of groups within molecule are called_________________? 

a. Isomerases  

b. Lyases  

c. Transferases  

d. Ligases 

Answer- Isomerases

Que- Rate of enzymatic reaction is directly proportional to the concentration of___________________? 

a. Enzyme  

b. Substrate  

c. Enzyme and substrate  

d. Enzyme and product 

Answer- Substrate

Que- Purines and pyrimidines are__________________? 

a. Enzymes  

b. Nitrogenous bases  

c. Carbohydrates  

d. Lipids 

Answer- Nitrogenous bases

Que- Nucleic acids direct the synthesis of__________________? 

a. Glucose  

b. Triglycerides  

c. Proteins  

d. All 

Answer- Proteins

Que- The fertility of the soil is improved by________________? 

a. Rotation of the crops  

b. Adding lime to the acid salts  

c. Adding manure and growing legumes  

d. All 

Answer- All

Que- The fertilizers which provide single nutrient from NPK are called ___________ fertilizer? 

a. straight  

b. compound  

c. both a and b  

d. none of the above 

Answer- straight

Que- Addition of urea to the soil is ____________ reaction? 

a. endothermic  

b. exothermic  

c. both a and b  

d. no heat energy is involved 

Answer- exothermic

Que- The cooling of molten urea by air in the tower is called______________________? 

a. prilling  

b. evaporation  

c. condensation  

d. crystallization 

Answer- prilling

Que- DAP (Diammonium hydrogen phosphate) contains ______________ plant nutrients? 

a. 60%  

b. 65%  

c. 70%  

d. 75% 

Answer- 75%

Que- Calcarious material includes_________________? 

a. lime stone  

b. marble  

c. chalk  

d. all of the above 

Answer- all of the above

Que- Which of the following processes is used for the synthesis of cement ? 

a. dry process  

b. wet process  

c. both  

d. none 

Answer- both

Que- How many zones through which the charge passes in a rotary kiln ? 

a. 4  

b. 3  

c. 2  

d. 5 

Answer- 4

Que- Which one of the following set of raw material is most suitable for manufacture of urea ? 

a. CH4 N2 and CO2  

b. H2 N2 and CO  

c. H2 CO2 and H2O  

d. H2O N2 and H2 

Answer- CH4 N2 and CO2

Que- The percentage of nitrogen in urea is________________? 

a. 36%  

b. 46%  

c. 56%  

d. 66% 

Answer- 46%

Que- Which one of the following fertilizers provides the nitrogen and phosphorus to the plant ? 

a. urea  

b. calcium superphosphate  

c. diammonium phosphate  

d. potassium nitrate 

Answer- diammonium phosphate

Que- Cement is a mixture of________________? 

a. clay and clinker  

b. clay lime stone and gypsum  

c. lime stone and gypsum  

d. lime stone and clay 

Answer- clay lime stone and gypsum

Que- Cement is a mixture of so many compounds roasted in rotary kiln. Which substances has greater percentage ? 

a. Lime (CaO)  

b. Silica (SiO2)  

c. Alumina (Al2O3)  

d. Magnesia (MgO) 

Answer- Lime (CaO)

Que- Which sequence of steps is correct for the manufacture of cement ? 

a. crushing heating mixing grinding  

b. crushing mixing heating grinding and mixing  

c. crushing grinding mixing heating  

d. mixing heating grinding crushing 

Answer- crushing grinding mixing heating

Que- The composition of mixture of clay and lime stone in the raw for cement material is __________________? 

a. 75% lime stone and 25% clay  

b. 25% lime stone and 75% clay  

c. 15% lime stone and 55% clay  

d. 55% lime stone and 15% clay 

Answer- 75% lime stone and 25% clay

Que- The important function of burning zone in the rotary kilm is __________________? 

a. to dry the moisture of slurry  

b. to decompose lime stone to unslaked lime  

c. combination of different oxides like CaO SiO2 Fe2O3 and Al2O3  

d. to reduce the impurities 

Answer- combination of different oxides like CaO SiO2 Fe2O3 and Al2O3

Que- Which of the following is incorrect statement about nitrogen importance ? 

a. It enhances plant growth  

b. It is involved in the synthesis of protein and nucleic acids  

c. it accelerates fruits and flowers growth  

d. It is involved in the chlorophyll synthesis 

Answer- it accelerates fruits and flowers growth

Que- Which of the following is macronutrient ? 

a. Cu  

b. Cl  

c. H  

d. Zn 

Answer- H

Que- Which of the following is the most suitable catalyst for ammonia synthesis ? 

a. Pt  

b. ZnO + Cr2O3  

c. Fe in fused mixture of Al2O3 + SiQ2 + MgO  

d. All of the above 

Answer- Fe in fused mixture of Al2O3 + SiQ2 + MgO

Que- Which of the following fertilizers is not useful for paddy rice ? 

a. urea  

b. DAP  

c. Ammonium sulphate  

d. Ammonium nitrate 

Answer- Ammonium nitrate

Que- Which of the following potassium fertilizers are more useful for horticultural crops tobacco & potatoes ? 

a. KCI  

b. KNO3  

c. K2SO4  

d. KMnO4 

Answer- KNO3

Que- Argillaceous material does not include________________? 

a. vlay  

b. marine shells  

c. slate  

d. blast furnace slag 

Answer- marine shells

Que- The nutrients which are required in very small amount for the normal growth of plants are called_________________? 

a. nitrogenous fertilizers  

b. micronutrients  

c. phosphorus fertilizer  

d. all of the above 

Answer- micronutrients

Que- Which one of the following is an inorganic fertilizer ? 

a. manure  

b. urea  

c. ammonium nitrate  

d. All 

Answer- ammonium nitrate

Que- The potassium present in plant help the plant to___________________? 

a. form starch sugar and fibrous material  

b. ripen the seeds and fruits  

c. increase the resistance against disease  

d. all the above statements are correct 

Answer- all the above statements are correct

Que- What is clinker ? 

a. roasted calcareous material  

b. roasted argillaceous material  

c. roasted calcareous and argillaceous material  

d. roasted gypsum 

Answer- roasted calcareous and argillaceous material

Que- Phosphorus helps in the growth of_________________? 

a. root  

b. leave  

c. stem  

d. seed 

Answer- seed

Que- Which one of the following raw material is not present in the cement ? 

a. lime stone  

b. gypsum  

c. KNO3  

d. iron oxide 

Answer- iron oxide

Que- The sequence of zones in the rotary kiln are as____________________? 

a. dry zone burning zone decomposition zone cooling zone  

b. cooling zone burning zone decomposition zone dry zone  

c. burning zone cooling zone decomposition zone  

d. dry zone decomposition zone burning zone cooling zone 

Answer- dry zone decomposition zone burning zone cooling zone

Que- The rate of reaction___________________? 

a. Increases as the reaction proceeds  

b. Decreases as the reaction proceeds  

c. Remains the same as the reaction proceeds  

d. May decrease or increase as the reaction proceeds 

Answer- Decreases as the reaction proceeds

Que- The specific rate constant of a first order reaction depends on the________________? 

a. Time  

b. Concentration of the reactant  

c. Temperature  

d. Concentration of the product 

Answer- Temperature

Que- The value of activation energy is primarily determined by_______________? 

a. Temperature  

b. Effective collision  

c. Concentration of reactants  

d. Chemical nature of reactants and products 

Answer- Effective collision

Que- Spontaneous reactions are_______________? 

a. Moderate  

b. Slow  

c. Fast  

d. not natural 

Answer- Fast

Que- Unit of rate of reaction is_________________? 

a. Moles dm-3 sec-1  

b. Moles dm-3  

c. Moles sec-1  

d. Mol-1 dm3 sec-1 

Answer- Moles dm-3 sec-1

Que- Rate of disappearance of reactant is equal to_________________? 

a. Rate of reaction   

b. Rate of formation of product  

c. Energy released during reaction  

d. A and B 

Answer- Rate of reaction 

Que- For 3rd order reaction the hhalf life is inversely proportional to initial concentration of reactants__________________? 

a. Single  

b. Square  

c. Cube  

d. Raise to power four 

Answer- Square

Que- Radiations are absorbed in_______________? 

a. Spectrophotometer method  

b. Dilatometric method  

c. Optical relation method  

d. Refractometric method 

Answer- Spectrophotometer method

Que- Energy of reactant higher than energy of product favours _______________? 

a. Endothermic 

b. Exothermic  

c. Moderate reaction  

d. No reaction 

Answer- Exothermic

Que- Which of the following will have very high rate of reaction ? 

a. Double decomposition reaction  

b. Neutralization reaction  

c. Ionic reactions  

d. all of above 

Answer- all of above

Que- Anything which increases rate of reaction without being involved in the reaction________________? 

a. Promoter  

b. Catalyst  

c. Inhibitor  

d. All of the above 

Answer- Catalyst

Que- When catalysts and reactants are in more than one phase it is________________? 

a. Homogeneous catalysis  

b. Heterogeneous catalysis  

c. Catalysis  

d. Ea 

Answer- Heterogeneous catalysis

Que- Biocatalytical proteins are_________________? 

a. Enzymes  

b. Substrate  

c. Lipids  

d. any of above 

Answer- Enzymes

Que- An enzyme has its specificity due to________________? 

a. Substrate  

b. Structure  

c. Temperature  

d. Pressure 

Answer- Structure

Que- A substance which increases the reactivity of enzyme is called_________________? 

a. Promoters  

b. Inhibitors  

c. Stimulators  

d. Non-activators 

Answer- Promoters

Que- When the reaction completes in more than one steps rate of reaction will be determined by________________? 

a. Fast step  

b. Slowest step  

c. All steps  

d. Molecularity of the reaction 

Answer- Slowest step

Que- Energy of activation for backward reaction is less than forward reaction for ___________ reactio? 

a. Endothermic  

b. Exothermic  

c. Moderate  

d. Fast 

Answer- Endothermic

Que- Which statement is incorrect about catalyst___________________? 

a. it is used in smaller amount  

b. decrease activation energy  

c. specific in action  

d. it affects specific rate constant 

Answer- it affects specific rate constant

Que- Which of the following type of reaction is 3rd order reaction_________________? 

a. 2N2O5 = 2N2O4 + O3  

b. NO + O3 ? NO2 + O2  

c. 2FeCl3 + 6KI ? 2FeI2 + 6KCl + I2  

d. None of these 

Answer- 2FeCl3 + 6KI ? 2FeI2 + 6KCl + I2

Que- The addition of a catalyst to the reaction system__________________? 

a. Increases the rate of forward reaction only  

b. Increases the rate of reverse reaction  

c. Increases the rate of forward but decreases the rate of backward reaction  

d. Increases the rate of forward as well as backward reaction equally 

Answer- Increases the rate of forward as well as backward reaction equally

Que- On increasing the temperature the rate of reaction increases mainly because_________________? 

a. The activation energy of the reaction increases  

b. Concentration of the reacting molecules increases  

c. Collision frequency increases  

d. None of these 

Answer- Collision frequency increases

Que- Sum of exponents of molar concentration is called___________________? 

a. Order of reaction  

b. Molecularity  

c. Rate of reaction  

d. Average of reaction 

Answer- Order of reaction

Que- In rate expression the concentration of reactants is negative. It shows_______________? 

a. Concentration of reactant does not change  

b. Concentration of product increases  

c. Concentration of reactant decreases  

d. Concentration of reactant increases 

Answer- Concentration of reactant decreases

Que- When a graph is plotted between 1/T on X-axis and log k on y-axis a straight line is obtained with a negative slope which has two end in__________________? 

a. I and II quadrant  

b. II and III quadrant  

c. III and IV quadrant  

d. II and IV quadrant 

Answer- II and IV quadrant

Que- Rate of reaction when concentration of reactants are taken as unity is called_________________? 

a. Arrhenius constant  

b. Molecularity  

c. Specific rate constant  

d. Ideal rate constant 

Answer- Specific rate constant

Que- Which order of reaction obeys the relation t1/2 = 1/Ka____________________? 

a. First order  

b. Second order  

c. Third order  

d. Zero order 

Answer- Second order

Que- Activated complex is formed due to________________? 

a. Pressure  

b. Effective collision  

c. Ineffective collisions  

d. Temperature 

Answer- Effective collision

Que- Energy required to form transition state is called _________________? 

a. Ea  

b. P.E  

c. V  

d. K.E 

Answer- Ea

Que- Greater the conc. Of reactant__________________? 

a. Greater will be dx/dt  

b. Lesser will be dx/dt  

c. dx/dt will be moderate  

d. any of above 

Answer- Greater will be dx/dt

Que- The substances that reduces the effectiveness of a catalyst are called ___________________? 

a. Promoters  

b. Poisoning catalysts  

c. Inhibitors  

d. pro-catalysts 

Answer- Poisoning catalysts

Que- Each catalyst has_________________? 

a. Specificity  

b. Special structure  

c. Its own Ea  

d. all of above 

Answer- all of above

Que- A catalyst can not effect__________________? 

a. Products  

b. Chemical equilibrium  

c. Reactants  

d. both A & B  

Answer- both A & B 

Que- Co-enzymes are_________________? 

a. Non proteineous  

b. Proteineous  

c. sugars  

d. lipids 

Answer- Non proteineous

Que- End name of enzyme is___________________? 

a. yl  

b. ase  

c. one  

d. al 

Answer- ase

Que- For determining the order of reaction we use__________________? 

a. Refractometric method  

b. Dilatometric method  

c. Optical activity method  

d. Half life method 

Answer- Half life method

Que- Elements in the same vertical group of the periodic table have same_______________? 

a. Number of valence electrons  

b. Atomic number  

c. Atomic mass  

d. Atomic volume 

Answer- Number of valence electrons

Que- Which set of elements is listed in order of increasing ionization energy ? 

a. Sb < As < S < P < Cl  

b. Cl < Sb < P < As < S  

c. As < Cl < P < S < Sb  

d. Sb < As < Cl < S < P 

Answer- Sb < As < S < P < Cl

Que- Which of the p-block elements are not representative elements ? 

a. Alkali metals (I-A)  

b. Group-14 elements (IV-A)  

c. Group-18 elements (VIII-A)  

d. Halogens (VII-A) 

Answer- Group-18 elements (VIII-A)

Que- Which of the following will not form crystalline structure with opporitely charged ions_________________? 

a. H+  

b. H-  

c. Mg2+  

d. Ca2+ 

Answer- H+

Que- Periodic table provides a basic framework to study elements with respect to their__________________? 

a. Physical properties  

b. Chemical properties  

c. Properties of their compounds  

d. All 

Answer- All

Que- Concept of Triads was introduced by_______________? 

a. Dobereiner  

b. Newland  

c. Mendeleev  

d. Al-Razi 

Answer- Dobereiner

Que- Elements with similar chemical properties appear in the_________________? 

a. Same family  

b. Same period  

c. p block elements  

d. Right upper corner 

Answer- Same family

Que- In modern periodic table all the leements are arranged in ascending order of__________________? 

a. Valency  

b. Atomic mass  

c. Atomic number  

d. Valence electrons 

Answer- Atomic number

Que- Inner transition elements are called _________________? 

a. Lanthanides  

b. Actinides  

c. Rare earth metals  

d. All 

Answer- All

Que- Non-metals usually form _________________ oxides? 

a. Acidic  

b. Amphoteric  

c. Neutral  

d. All of the above 

Answer- Acidic

Que- Best position of hydrogen in the periodic table is above I.A Group which is mainly due to_______________? 

a. Both are electropositive  

b. Similar outer most shell electronic configuration  

c. Both form ionic compounds  

d. All 

Answer- All

Que- Which one of the following sets consists of all coinage metals ? 

a. Cu Hg Au  

b. Cu Ag Au  

c. Ag Au Hg  

d. Cu Fe Au 

Answer- Cu Ag Au

Que- Many properties of an element and its compounds can be predicted from the position of the element in the periodic table. What property could not be predicted in this way ? 

a. The nature of its oxides  

b. The charge on its ions  

c. The formula of its oxide  

d. Its number of isotopes 

Answer- Its number of isotopes

Que- The atomic radii decreases by increasing atomic number in________________? 

a. Alkali metal  

b. Alkaline earth metal  

c. Elements from Li to Ne  

d. Halogens 

Answer- Elements from Li to Ne

Que- An element has electronic conviguration 1s2 2s2 2p2. It belongs to__________________? 

a. Group II-A  

b. Group IV-A  

c. Group VII-A  

d. Group VI-A 

Answer- Group IV-A

Que- Which of the following ion is stable in aqueous solution ? 

a. H+  

b. H-  

c. Cl-  

d. All are stable 

Answer- Cl-

Que- The atoms of same element having same atomic number but different mass number are called____________________? 

a. Isobars  

b. Isomers  

c. Isotopes  

d. Isotropes 

Answer- Isotopes

Que- Shielding effect across the period_________________? 

a. Increases  

b. Decreases  

c. Can not be predicted  

d. Remains constant 

Answer- Remains constant

Que- Higher value of electron affinity means__________________? 

a. Atom will lose electron easily  

b. Atom will gain electron easily  

c. Atom may form di-positive ion  

d. The reason is unknown 

Answer- Atom will gain electron easily

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