chemistry Mcqs
451. Amylose is__________________?
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A. Soluble in water

B. Insoluble in water

C. Soluble in alcohol

D. Partially soluble in alcohol

452. The sequence of zones in the rotary kiln are as____________________?
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A. burning zone cooling zone decomposition zone

B. dry zone burning zone decomposition zone cooling zone

C. dry zone decomposition zone burning zone cooling zone

D. cooling zone burning zone decomposition zone dry zone

453. Phosphorus helps in the growth of_________________?
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A. stem

B. root

C. seed

D. leave

454. Triglycerides are easily hydrolyzed by enzymes called_________________?
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A. Hydrolases

B. Ligases

C. Lyases

D. Lipases
455. The composition of mixture of clay and lime stone in the raw for cement material is __________________?
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A. 15% lime stone and 55% clay

B. 75% lime stone and 25% clay

C. 25% lime stone and 75% clay

D. 55% lime stone and 15% clay

456. The process of polymerization was classified by___________________?
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A. W. H. Carothers

B. Strecker

C. Sabatier

D. Runge

457. Greater value of standard reduction potential smaller will be tendency______________?
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A. to form positive ions

B. to form negative ions

C. gain electrons

D. all are possible

458. Concentration of solute molecule when they are in equilibrium with solid substance at particular temperature is called________________?
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A. unsaturated solution

B. super saturated solution

C. solubility

D. saturated solution

459. Unit of rate of reaction is_________________?
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A. Moles dm-3 sec-1

B. Mol-1 dm3 sec-1

C. Moles sec-1

D. Moles dm-3

460. Which of the following can form a chealate______________________?
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A. ammine

B. cyano

C. carbonyl

D. oxalato
461. Saponification is the hydrolysis of fat or oil with an__________________?
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A. Enzyme and acid

B. Alkali

C. Enzyme and alkali

D. Acid

462. Animal and vegetable fats are___________________?
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A. Triesters formed from glycerol and fatty acids

B. Tetraesters formed from glycerol and fatty acids

C. Fatty acids

D. Glycerols

463. Rate of enzymatic reaction is directly proportional to the concentration of___________________?
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A. Substrate

B. Enzyme and substrate

C. Enzyme and product

D. Enzyme

464. The specific rate constant of a first order reaction depends on the________________?
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A. Temperature

B. Concentration of the product

C. Concentration of the reactant

D. Time

465. When light is exposed to transition element then electrons jump from lower orbitals to higher orbitals in______________________?
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A. orbitals of f-subshell

B. orbitals of d-subshell

C. orbitals of p-subshell

D. both A & B
466. K2 (Cu(CN)4) which one is correct___________________?
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A. Potassium tetra cyano cupperate

B. Ligand is positively charged

C. Central atom is present in avionic sphere

D. Co-ordination number is 2

467. Purines and pyrimidines are__________________?
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A. Lipids

B. Enzymes

C. Nitrogenous bases

D. Carbohydrates

468. The important monomers of acryclic resins is__________________?
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A. Vinyl chloride

B. Styrene

C. Methylmethacrylate

D. Hexamethylenediamine

469. Potential of SHE is considered as__________________?
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A. multiple of 1

B. constant

C. unity

D. zero
470. In the production of wrought iron Mg Si and P are removed in the form of___________________?
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A. silicates

B. oxides

C. carbonates

D. slag
471. Negative log of mular concentration of H+ ions is called___________________?
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A. pKw

B. pOH

C. pH

D. pKa

472. The element that act as anode always have ______________ position in electrochemical cell?
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A. in middle

B. no effect of position

C. lower

D. higher
473. Ozone hole is substantial depletion of ozone in every year during__________________?
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A. Aug Nov

B. Sep Nov

C. Dec Jan

D. Nov Dec

474. Energy of activation for backward reaction is less than forward reaction for ___________ reactio?
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A. Moderate

B. Exothermic

C. Endothermic

D. Fast

475. Compounds attracted by applied strong magnetic field are called__________________?
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A. ferromagnetic

B. paramagnetic

C. good conductor

D. diamagnetic

476. With impurities like P and S the open hearth furnace is lined with ?
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A. FeO

B. Fe2O3

C. CaO MgO

D. SiO2

477. When the central atom of coordination compound is sp3d2 hybridization the expected geometry will be___________________?
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A. tetrahedral

B. trigonal bipyramidal

C. square planar

D. octahedral
478. Which of the following gases is the main cause of acid rain ?
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A. CO

B. NO2

C. both a & b

D. none of the above

479. Conversion of reactant into product in unit time is called________________?
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A. rate of backward reaction

B. rate of forward reaction

C. rate constant

D. rate co-efficient

480. Anything which increases rate of reaction without being involved in the reaction________________?
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A. Inhibitor

B. Promoter

C. Catalyst

D. All of the above

481. Zn(s)/Zn+2(aq) 1M | | Cu+2(aq) 1M/Cu(s) is representation of reaction in______________?
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A. Voltaic cell

B. Nelsons cell

C. Daniel cell

D. Downs cell

482. Newspaper can be recycled again and again how many times ?
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A. 3

B. 4

C. 2

D. 5
483. Capacity of one lead accumulator cell is___________________?
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A. 1.5 volts

B. 2 volts

C. 3 volts

D. 1 volts

484. The yellow colour in photochemical smog is due to presence of__________________?
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A. chlorine dioxide

B. chlorine gas

C. dinitrogen oxide

D. nitrogen dioxide
485. When sparingly soluble salt is in equilibrium with molar concentration of its oppositely charged ion when the product is called_________________?
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A. dissociation constant for an acid

B. dissociation constant

C. solubility product

D. common ion effect

486. The oxidation state of transition elements is usually _______________________?
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A. infinite

B. variable

C. single

D. constant

487. The main pollutant of leather tanneries in the waste water is____________________?
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A. chromium III

B. chromium V

C. chromium IV

D. chromium VI

488. Pure metal__________________?
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A. none of these

B. corrode slowly

C. corrode rapidly

D. does not corrode easily
489. H2 gas in SHE is filled at pressure of___________________?
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A. 780mm of Hg

B. 750mm of Hg

C. 760mm of Hg

D. 800mm of Hg

490. Which one of the following raw material is not present in the cement ?
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A. gypsum

B. iron oxide

C. lime stone

D. KNO3

491. Coordination number of the transition element in [Pt Cl NO2 (NH3)4]2- is____________________?
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A. 6

B. 2

C. 8

D. 4

492. Ka<10-3 means______________?
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A. Very weak acid

B. Very strong acid

C. Very strong base

D. Very strong salt

493. All proteins yield ___________ upon complete hydrolysis?
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A. Nitrogen

B. Carbon and hydrogen

C. Amino acids

D. Sulphur

494. Acid present in acid rain may be__________________?
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A. H2SO4

B. HNO3

C. both A and B

D. none

495. Solution with maximum concentration of solute at given temperature is called________________?
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A. unsaturated solution

B. dilute solution

C. saturated solution

D. Super saturated solution

496. In which of the following equilibria will Kc and Kp have the same value ?
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A. N2 + O2 = 2NO

B. N2 + 3H2 = 2NH

C. PCI5 = PCI3 + Cl2

D. 2CO + O2 = CO2

497. The specie which donates electrons to central metal atom in coordination sphere is called____________________?
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A. Ligand is positively charged

B. anion

C. cation

D. acid

498. The half cells are interconnected through________________?
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A. salt bridge

B. no connection exists

C. wire

D. electric circuit

499. Which of the following is an example of liquid in gas solution?
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A. Opals

B. Paints

C. Dust particles in smoke

D. Fog
500. Homogeneous mixture of two or more than two compounds is called__________________?
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A. radical

B. solution

C. ion

D. compound