Top Chemistry MCQS
All Questions for: Top Chemistry MCQS
Question 501: Solvent used in separation of biomolecules is _______________?
- A Acetone
- B Ether
- C Alcohol
- D Trichloroacetic acid
Explanation: The correct answer to the question is: Trichloroacetic acid
Question 502: The product of the reaction between steam and Hydrocarbon in presence of Ni catalyst at 900°C is _____.
- A CO+H²(water gas)
- B CO²+O²
- C CO³+H²O
- D Laughing Gas
Explanation: The correct answer to the question is: CO+H²(water gas)
Question 503: Lactic acid on oxidation by alkaline potassium permanganate gives:____________?
- A Pyruvic acid
- B Propionic acid
- C Tartaric acid
- D Cinnamic acid
Explanation: The correct answer to the question is: Pyruvic acid
Question 504: Which compound form benzoic acid on oxidation with acidified KMnO4 or K2Cr2O7 ?
- A Ethyl benzene
- B n-propyl benzene
- C Toluene
- D All
Explanation: The correct answer to the question is: All
Question 505: Which of the following produces black spots when it comes in contact with organic substances such as skin and cellulose?
- A CuSO4
- B CH3COOH
- C K2MnO4
- D AgNO3
Explanation: The correct answer to the question is: AgNO3
Question 506: The rate of formation of ozone depends on the flux of:
- A Infrared radiation
- B Ultra violet radiation
- C visible radiation
- D Gamma rays
Explanation: The correct answer to the question is: Ultra violet radiation
Question 507: In water, Hydrogen is present ________by mass.
- A 15.15%
- B 31.13%
- C 11.11%
- D 22%
Explanation: The correct answer to the question is: 11.11%
Question 508: Polyvinyl acetate is the Polymer of __________?
- A Methyl methacrylate
- B Vinyl acetate
- C Formaldehyde
- D Vinyl Chloride
Explanation: The correct answer to the question is: Vinyl acetate
Question 509: Formaldehyde on condensation in the presence of calcium hydroxide: ______________?
- A Maltose
- B Fructose
- C Xylose
- D Formose
Explanation: The correct answer to the question is: Formose
Question 510: Amino acids are a product of the digestion of: ___________?
- A Fats
- B Vitamins
- C Carbohydrates
- D Proteins
Explanation: The correct answer to the question is: Proteins
Question 511: O3 reacts with C2H4 to form ozonide, while on further hydrolysis it forms _________?
- A Ethyl alcohol
- B Ethylene glycol
- C HCHO
- D Ethylene oxide
Explanation: The correct answer to the question is: HCHO
Question 512: In primary alkyl halides the halogen atom is attached to a carbon which is further attached to how many carbon atoms__________________?
- A four
- B one
- C three
- D two
Explanation: The correct answer to the question is: one
Question 513: Which instrument is used to measure the viscosity.?
- A Anemometer
- B Hydrometer
- C Viscometer
- D Hygrometer
Explanation: The correct answer to the question is: Viscometer
Question 514: For which mechanisms the first step involved is the same ?
- A E1 + E2
- B E2 + SN2
- C E1 and SN1
- D SN1 and SN2
Explanation: The correct answer to the question is: E1 and SN1
Question 515: In whole Periodic Table which element Is Most Reducing Agent ?
- A lithium
- B Neon
- C Chlorine
- D Helium
Explanation: The correct answer to the question is: lithium
Question 516: An alcohol which can be prepared by fermentation is_________________?
- A CH3 – CH2 – OH
- B C3H7OH
- C CH3OH
- D C6H5OH
Explanation: The correct answer to the question is: CH3 – CH2 – OH
Question 517: On heating aldehydes with Fehlings solution we get a precipitate whose colour is_________________?
- A black
- B brick red
- C pink
- D yellow
Explanation: The correct answer to the question is: brick red
Question 518: Which of the following statements is false about transition metals?
- A They form complexes
- B They form coloured ions
- C All transition metal compounds are paramagnetic
- D They show variable valency
Explanation: The correct answer to the question is: All transition metal compounds are paramagnetic
Question 519: Which one of following amino acid is neither acidic nor a basic in nature ?
- A Histidine
- B Proline
- C Glutamic acid
- D Lysine
Explanation: The correct answer to the question is: Proline
Question 520: Which of the following will have the highest boiling point ?
- A ethanal
- B methanol
- C hexanone
- D propanal
Explanation: The correct answer to the question is: hexanone
Question 521: The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is___________?
- A 4.05 gram
- B 5.05 gram
- C 3.05 gram
- D 2.05 gram
Explanation: The correct answer to the question is: 3.05 gram
Question 522: Which one of the following is most acidic?
- A O-nitrophenol
- B M-nitrophenol
- C P-nitrophenol
- D Phenol
Explanation: The correct answer to the question is: P-nitrophenol
Question 523: The amount of Benzene is obtained from Coal Tar on its Fractional Distillation?
- A 1-4Kg
- B 1-3Kg
- C 1-2Kg
- D 1-5Kg
Explanation: The correct answer to the question is: 1-2Kg
Question 524: The average salinity of sea water is________?
- A 3.5%
- B 2.5%
- C 3%
- D 2%
Explanation: The correct answer to the question is: 3.5%
Question 525: Which element can form tripositive ion ?
- A Carbon
- B Silicon
- C Beryllium
- D Aluminium
Explanation: The correct answer to the question is: Aluminium
Question 526: The element used for the formation of alloys is__________?
- A Mercury
- B Iron
- C Chromium
- D Calcium
Explanation: The correct answer to the question is: Chromium
Question 527: Which one of the following halogens is present in Teflon________________?
- A I2
- B F2
- C Cl2
- D Br2
Explanation: The correct answer to the question is: F2
Question 528: Dimethyl ketones are usually characterized through_____________?
- A Iodoform test
- B Benedict’s reagent
- C Tollen’s reagent
- D Schiff’s test
Explanation: The correct answer to the question is: Iodoform test
Question 529: Which molecule have stronger London dispersion forces?
- A Hydrochloric acid
- B Hydrogen gas
- C Water
- D Bromine
Explanation: The correct answer to the question is: Water
Question 530: The IUPAC name of pyridines is__________?
- A Azolidins
- B Azolo
- C Azine
- D Diazine
Explanation: The correct answer to the question is: Azine
Question 531: The organic compound used as antiknock agent in petroleum is____________?
- A TNT
- B CH MgBr
- C CH )Hg
- D (CH )Pb
Explanation: The correct answer to the question is: (CH )Pb
Question 532: Identify among the following which is not the unsaturated hydrocarbon.
- A CH
- B CH
- C CH
- D CH
Explanation: The correct answer to the question is: CH
Question 533: Which one of the following is the correct sequence according to atomic weights?
- A Co > Ni > Fe
- B Fe>Co> Ni
- C Co >Fe>Ni
- D Ni> Co> Fe
Explanation: The correct answer to the question is: Co > Ni > Fe
Question 534: The Chemical Formula of Sand is___________?
- A SiO2
- B Si2O3
- C Sr2O
- D Al2O3
Explanation: The correct answer to the question is: SiO2
Question 535: Generally the limit of visible spectrum is__________?
- A 3800 to 7600 A°
- B 8000 to 10,000 A°
- C 1000 to 300 A°
- D 12,000 to 15,000 A°
Explanation: The correct answer to the question is: 3800 to 7600 A°
Question 536: Which gas is used for artificial ripening of green fruit ?
- A Ethane
- B Carbon dioxide
- C Acetylene
- D Ethylene
Explanation: The correct answer to the question is: Ethylene
Question 537: Formaldehyde condenses with phenol in the presence of dilute H2SO4 to yield________________?
- A Bakelite
- B Nylon 66
- C urotropine
- D Aniline formaldehyde plastic
Explanation: The correct answer to the question is: Bakelite
Question 538: Which of the following can be separated by ” Sublimation Method”?
- A None
- B Both A & B
- C Sand and Naphthalene
- D Sand and Iron Filing
Explanation: The correct answer to the question is: Sand and Naphthalene
Question 539: The rate of E1 reaction depends upon______________________?
- A base the concentration of substrate as well as nucleophile
- B the concentration of nucleophile
- C the concentration of substrate
- D the concentration of substrate as well as nucleophile
Explanation: The correct answer to the question is: the concentration of substrate
Question 540: The maximum mass is present in 1dm3 for the following gas at STP.
- A CO
- B CO
- C CH
- D CS
Explanation: The correct answer to the question is: CS
Question 541: A gas was found to have a density of 0.0847g/L at 17°C and a pressure of 760 torr. The gas must be?
- A CH4
- B None of These
- C He
- D N2
Explanation: The correct answer to the question is: He
Question 542: Acetophenone is a_____________________?
- A Aldehyde
- B Ester
- C Ether
- D Ketone
Explanation: The correct answer to the question is: Ketone
Question 543: Atomic number of Mn is 25 what is the electronic configuration in the ground state________________?
- A 1s2 2s2 2p6 3s2 3p6 3d7
- B 1s2 2s2 2p6 3s2 3p6 4s2 4p5
- C 1s2 2s2 2p6 3s2 3p6 4s23d5
- D 1s2 2s2 2p6 3s2 3p5 3d10
Explanation: The correct answer to the question is: 1s2 2s2 2p6 3s2 3p6 4s23d5
Question 544: All members of homologous series have different __________?
- A all of them
- B chemical properties
- C physical properties
- D functional group
Explanation: The correct answer to the question is: physical properties
Question 545: Heating phenol with Zn will yield_________________?
- A Benzoic acid
- B Benzene
- C Cyclohexane
- D Phenoxide
Explanation: The correct answer to the question is: Benzene
Question 546: Numbers of subatomic particles?
- A 3
- B 1
- C more than 3
- D 2
Explanation: The correct answer to the question is: more than 3
Question 547: The most commonly used bleaching agent is_________?
- A sodium chlorine
- B carbon dioxide
- C chlorine
- D alcohol
Explanation: The correct answer to the question is: chlorine
Question 548: The easy way of balancing the chemical equation is_________?
- A None of the above
- B First we balance Metal than non-metal than Hydrogen than Oxygen.
- C according to atom’s atomic number.
- D According to atom’s atomic mass.
Explanation: The correct answer to the question is: First we balance Metal than non-metal than Hydrogen than Oxygen.
Question 549: Hyperconjugation is also known as ____________?
- A Reasonable
- B Electromeric effect
- C Inductive effect
- D no bond reasonable
Explanation: The correct answer to the question is: no bond reasonable
Question 550: The one mole of _____molecule has the highest number of atoms?
- A HClO
- B O
- C HCO
- D HSO
Explanation: The correct answer to the question is: HCO