Top Chemistry MCQS
All Questions for: Top Chemistry MCQS
Question 451: Which one of the following radiation has the longer wavelength?
- A visible
- B x-ray
- C infra red
- D ultra violet
Explanation: The correct answer to the question is: infra red
Question 452: Barret esophagus is good example of__________?
- A Atrophy
- B Dysplasia
- C Metaplasia
- D Hypertrophy
Explanation: The correct answer to the question is: Metaplasia
Question 453: Which one is least ionic in nature and decompose on heating ?
- A LiOH
- B NaOH
- C CsOH
- D KOH
Explanation: The correct answer to the question is: LiOH
Question 454: The molecular formula of Glucose is____________?
- A CHO
- B CHO
- C CH
- D NH
Explanation: The correct answer to the question is: CHO
Question 455: The relatively high energy of the gauche conformation of butane is primarily associated with_________?
- A Orbital strain
- B Steric strain
- C Angle strain
- D Torsional strain
Explanation: The correct answer to the question is: Steric strain
Question 456: diamond got brilliance due to following reason?
- A refraction
- B all of the above
- C reflection
- D dispersion
Explanation: The correct answer to the question is: all of the above
Question 457: The process in which solid changes directly into vapours without passing through liquid state?
- A Evaporation
- B Sublimation
- C None
- D Decantation
Explanation: The correct answer to the question is: Sublimation
Question 458: Surface water contains:_____________?
- A Organic matter
- B only salt
- C Salt & Organic matter
- D Suspended impurity
Explanation: The correct answer to the question is: Salt & Organic matter
Question 459: The residue obtained after the crystallization of sugar from concentrated sugar cane juice is called__________________?
- A Mother liquor
- B Molasses
- C Filterate
- D Extract
Explanation: The correct answer to the question is: Molasses
Question 460: The distinction test for primary secondary and tertiary alcohol required to react each of them is_________________?
- A Cone. HCI and anhydrous PCl2
- B Cone. HCI and anhydrous ZnCl2
- C Cone. HCI and anhydrous SOCl2
- D Cone. HCI and anhydrous CaCl2
Explanation: The correct answer to the question is: Cone. HCI and anhydrous ZnCl2
Question 461: The by-product of the process of Saponification is___________?
- A Glycerol
- B Glycol
- C Sodium hydroxide
- D Methanol
Explanation: The correct answer to the question is: Glycerol
Question 462: What is the color of precipitates of AgI?
- A Brown
- B Yellow
- C Light Yellow
- D Blue
Explanation: The correct answer to the question is: Yellow
Question 463: How many moles are in 22.2 grams of Calcium chloride, CaCl2?
- A 0.5 moles
- B 0.3 moles
- C 0.4 moles
- D 0.2 moles
Explanation: The correct answer to the question is: 0.2 moles
Question 464: Aldehydes and ketones both, show the type of Isomerism is __________?
- A Metamerism
- B chain Isomerism
- C Position Isomerism
- D Functional Group Isomerism
Explanation: The correct answer to the question is: Functional Group Isomerism
Question 465: Cations possess __________ charge?
- A -ve
- B None
- C Neutral
- D +ve
Explanation: The correct answer to the question is: +ve
Question 466: By which method the molecular mass of benzene was determined as 78.108 ?
- A Distillation methos
- B Vapour density method
- C X-ray diffraction method
- D Specific gravity method
Explanation: The correct answer to the question is: Vapour density method
Question 467: CO2 is gas while SiO2 is solid at room temperature?
- A CO2 is an independent molecule while SiO2 has network covalent structure
- B Silicon has all sigma bonds
- C CO2 forms multiple bond while silicon does not form multiple bonds
- D carbon is non-metal while silicon is semi-metal
Explanation: The correct answer to the question is: CO2 is an independent molecule while SiO2 has network covalent structure
Question 468: NaOH is named as caustic soda because________________?
- A It is used in soda water
- B It reacts with fats to form soap
- C It reacts with chlorine gas
- D It corrodes the organic tissues
Explanation: The correct answer to the question is: It corrodes the organic tissues
Question 469: The rectified spirit contains________________?
- A 90% alcohol
- B 100% alcohol
- C 12% alcohol
- D 95% alcohol
Explanation: The correct answer to the question is: 95% alcohol
Question 470: How many moles of H2 are added up when benzene is heated with hydrogen in the presence of platinum ?
- A Two
- B Four
- C Three
- D Six
Explanation: The correct answer to the question is: Three
Question 471: What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ?
- A Radium dating
- B Deuterium dating
- C Carbon dating
- D Uranium dating
Explanation: The correct answer to the question is: Carbon dating
Question 472: Which of the following is the Radioactive isotope of Hydrogen?
- A Tritium
- B Deuterium
- C Protium
- D Nichromium
Explanation: The correct answer to the question is: Tritium
Question 473: The radiations with negative charge are________.
- A positron
- B Gamma radiations
- C Beta radiations
- D Alpha radiations
Explanation: The correct answer to the question is: Beta radiations
Question 474: Bleaching powder is an example of________________?
- A Mixed salt
- B Double salt
- C Complex
- D Normal salt
Explanation: The correct answer to the question is: Mixed salt
Question 475: What is the color of precipitates of AgBr?
- A Light brown
- B Light green
- C Light yellow
- D Light Blue
Explanation: The correct answer to the question is: Light yellow
Question 476: P2O5 is a hygroscopic powder which sublimes at______________?
- A 630°C
- B 620°C
- C 360°C
- D 260°C
Explanation: The correct answer to the question is: 360°C
Question 477: The IUPAC name of ethylene oxide is__________?
- A Oxoethene
- B Epoxy methane
- C Methoxymethane
- D Oxirane
Explanation: The correct answer to the question is: Oxoethene
Question 478: The concept of telluric helix was developed by___________?
- A Dobereiner
- B A.E de Chancourtois
- C Lother Meyer
- D Newland
Explanation: The correct answer to the question is: A.E de Chancourtois
Question 479: The theoretical yield is, when % yield and actual yied are 55% and 24g respectively:
- A 45g
- B 43.6g
- C 41.4g
- D 40g
Explanation: The correct answer to the question is: 43.6g
Question 480: What catalyst is employed when benzene is prepared from acetylene at 70°C?
- A Organo-nickel
- B Raney nickel
- C Ni 250 – 300°C
- D Cr2O3 + A2O3 + SiO2
Explanation: The correct answer to the question is: Organo-nickel
Question 481: Milk tastes sour when kept in the open for sometime due to the formation of __________?
- A lactic acid
- B acetic acid
- C citric acid
- D carbonic acid
Explanation: The correct answer to the question is: lactic acid
Question 482: Alpha particles can be detected by using___________?
- A Thin Aluminium sheet
- B Gold foils
- C Zinc sulphide screen
- D Barium sulphate
Explanation: The correct answer to the question is: Zinc sulphide screen
Question 483: The equation that represents the relationship of Faraday’s first law of electrolysis is _______?
- A Z= At/M
- B w=Z/At
- C Z=At
- D w=ZAt
Explanation: The correct answer to the question is: w=ZAt
Question 484: The subatomic particle that has negative charge is___________?
- A Neutron
- B Electron
- C None of These
- D Proton
Explanation: The correct answer to the question is: Electron
Question 485: The reaction of C2H5OH with conc. H2SO4 does not give_________?
- A Ethyl hydrogen sulphate
- B Diethyl ether
- C Ethene
- D Acetylene
Explanation: The correct answer to the question is: Acetylene
Question 486: Following are the anions of soap which form Ca and Mg ions which we see as curd in water
- A Sodium octadecanoate
- B Sodium pentadecanoate
- C Sodium hexadecanoate
- D Both A & B
Explanation: The correct answer to the question is: Both A & B
Question 487: The PH of the 0.0032 M H2SO4 is__________?
- A 2.198
- B 4.0
- C 1.0
- D 3.2
Explanation: The correct answer to the question is: 3.2
Question 488: Alpha (α) particles are helium (He) nucleus with a charge of __________ ?
- A 2e
- B 4e
- C 3e
- D e
Explanation: The correct answer to the question is: 2e
Question 489: Polyamides are synthetic polymers commonly known as___________?
- A Nylon
- B Cellulose
- C synthetic
- D Protein
Explanation: The correct answer to the question is: Nylon
Question 490: Phenanthrene is a fused polycyclic compound contains __________ benzene rings ?
- A Two
- B Five
- C Three
- D Four
Explanation: The correct answer to the question is: Three
Question 491: The distribution coefficient is related to:______________?
- A Separating factors
- B Colouring factors
- C retardation factors
- D decreasing factors
Explanation: The correct answer to the question is: Separating factors
Question 492: In Aldehydes and Ketones, carbon of carbonyl group is ____________?
- A Unhybridised
- B sp hybridised
- C sp hybridised
- D sp hybridised
Explanation: The correct answer to the question is: sp hybridised
Question 493: Formula of Chile saltpetre is__________________?
- A NaNO3
- B NH4Cl
- C Ba (NO3)2
- D CaCO3
Explanation: The correct answer to the question is: NaNO3
Question 494: Which of the following is the most reactive_________________?
- A ethane
- B ethene
- C benzene
- D ethyne
Explanation: The correct answer to the question is: ethene
Question 495: Where does the oxygen that keeps us alive come from?
- A Oxides of minerals
- B Carbon dioxide
- C Water
- D Carbonates absorbed from soil
Explanation: The correct answer to the question is: Water
Question 496: Which is the paramagnetic oxide of chlorine ?
- A all
- B Cl2O6
- C ClO2
- D Cl2O7
Explanation: The correct answer to the question is: ClO2
Question 497: Grignard reagent is reactive due to___________________?
- A all
- B the presence of halogen atom
- C the presence of magnesium atom
- D the polarity of C-Mg bond
Explanation: The correct answer to the question is: the polarity of C-Mg bond
Question 498: Real gases show ideal behavior at_______?
- A High Temp & Low Pressure
- B Low Temp & Low Pressure
- C High Temp & High pressure
- D Low Temp & High Pressure
Explanation: The correct answer to the question is: High Temp & Low Pressure
Question 499: The amount of Zinc (at. Wt=65) necessary to produce 224 ml of H2 by the reaction with an acid will be______?
- A 0.065gm
- B 6.5gm
- C 0.65gm
- D 7.5gm
Explanation: The correct answer to the question is: 7.5gm
Question 500: Formaldehyde and lactose are combined to produce throat lozenges named as__________________?
- A formalactose
- B aldomint
- C lactomint
- D formamint
Explanation: The correct answer to the question is: formamint