Top Chemistry MCQS
All Questions for: Top Chemistry MCQS
Question 601: Commercial detergents contain mainly _____________?
- A RCOON
- B ROsO3Na
- C RSNa
- D RONa
Explanation: The correct answer to the question is: RCOON
Question 602: Which of the following is solid?
- A None
- B Stone
- C Water
- D Both
Explanation: The correct answer to the question is: Stone
Question 603: Parke’s process is used in the extraction of________?
- A Iron
- B Zinc
- C Sodium
- D Silver
Explanation: The correct answer to the question is: Silver
Question 604: If speed of gas molecules increases by twice on heating. What will be their kinetic energy?
- A increases by two times
- B decrease by four times
- C decreases by two times
- D increases by four times
Explanation: The correct answer to the question is: increases by four times
Question 605: All the elements in group VIA are ___________________ in nature?
- A metals
- B polymeric
- C hygroscopic
- D all of above
Explanation: The correct answer to the question is: polymeric
Question 606: The usual property of ionic crystal are:_____________?
- A Compound forming
- B gaseous form
- C Stable
- D Unstable
Explanation: The correct answer to the question is: Compound forming
Question 607: The phosphate present in sewage water which cause eutrophication Can be removed by adding:
- A Alum
- B permangnate
- C Chlorine
- D Lime
Explanation: The correct answer to the question is: Lime
Question 608: The resonance energy of benzene is__________________?
- A 250.5 Cal/mol
- B 250.5 kJ/mol
- C 150.5 kJ/mol
- D 150.5 Cal/mol
Explanation: The correct answer to the question is: 150.5 kJ/mol
Question 609: The heat required to raise the temperature of body by 1 K is called___________?
- A specific heat
- B None of the above
- C water equivalent
- D thermal capacity
Explanation: The correct answer to the question is: thermal capacity
Question 610: In unsaturated hydrocarbons electrons favour___________________?
- A less reactivity
- B substitution reactions
- C none
- D addition reactions
Explanation: The correct answer to the question is: addition reactions
Question 611: The formula of starch is__________________?
- A (C6H10O5)n
- B C12H22O11
- C C6H12O6
- D C6H10O5
Explanation: The correct answer to the question is: (C6H10O5)n
Question 612: Who is often referred to as the “father of Chemistry”?
- A Dmitri Mendeleev
- B Isaac Newton
- C Antoine Lavoisier
- D Albert Einstein
Explanation: The correct answer to the question is: Antoine Lavoisier
Question 613: Which one of the following gives white precipitate with aqueous solution of BaCl2?
- A NaHCO3
- B NaNO3
- C Na2CrO4
- D Na2CO3
Explanation: The correct answer to the question is: Na2CO3
Question 614: Column of manometer which faces liquid is __________ ?
- A Remains same
- B Depressed
- C Compressed
- D Raised
Explanation: The correct answer to the question is: Depressed
Question 615: 4moles of Carbon dioxide(CO2) have _____molecules.
- A 18.06 x 10
- B 6.02 x 10
- C 24.08 x 10
- D 12.04 x 10
Explanation: The correct answer to the question is: 24.08 x 10
Question 616: According to Kinetic Molecular Theory gas molecules move in_______path?
- A Hyperbolic
- B Straight
- C Zig-zag
- D Parabolic
Explanation: The correct answer to the question is: Straight
Question 617: Which alkyl halide out of the following may follow both SN1 and SN2 mechanism ?
- A (CH3)2 CH – X
- B (CH3)3 C-CH2 – X
- C CH3-X
- D (CH3)3 C – X
Explanation: The correct answer to the question is: (CH3)2 CH – X
Question 618: Distance at which attractive forces of hydrogen overcome repulsive forces is __________ ?
- A 75.3pm
- B 75.2pm
- C 75.4pm
- D 75.5pm
Explanation: The correct answer to the question is: 75.4pm
Question 619: O3 reacts with CH2CH2 to form ozonide. On hydrolysis it forms
- A Ethylene oxide
- B Ethyl alcohol
- C Ethylene glycol
- D HCHO
Explanation: The correct answer to the question is: HCHO
Question 620: The bond energy of Hydrogen molecule is__________?
- A 110Kcal/mol
- B 150KJcal/mol
- C 104Kcal/mol
- D 106Kcal/mol
Explanation: The correct answer to the question is: 104Kcal/mol
Question 621: The following alcohol does not undergo oxidation is _____________?
- A 2° alcohol
- B 3° alcohol
- C 1° alcohol
- D 0° alcohol
Explanation: The correct answer to the question is: 3° alcohol
Question 622: Michael Faraday discovered benzene in the gas which was produced by destructive distillation of vegetable oil that is done in________________?
- A The presence of Oxygen
- B The presence of excessive Oxygen
- C The presence of Hydrogen
- D The absence of Oxygen
Explanation: The correct answer to the question is: The absence of Oxygen
Question 623: SN2 reaction can be best carried out with__________________?
- A primary alkyl halide
- B all
- C tertiary alkyl halide
- D secondary alkyl halide
Explanation: The correct answer to the question is: primary alkyl halide
Question 624: Magnesium metal does not burn in the vessel containing_______________?
- A N2 and O2
- B Ne
- C O2
- D N2
Explanation: The correct answer to the question is: Ne
Question 625: Which is fused cyclic aromatic compound _____________________?
- A diphenyl methane
- B biphenyl
- C naphthalene
- D diphenyl amine
Explanation: The correct answer to the question is: naphthalene
Question 626: Potassium Permanganate is used for purifying drinking water, because_________?
- A It is a reducing agent.
- B It dissolves the impurities of water.
- C It is a sterilising agent.
- D It is an oxidising agent.
Explanation: The correct answer to the question is: It is an oxidising agent.
Question 627: Silver nitrate is used in laboratory as a reagent for the detection and determination of____________?
- A Aldehydes
- B Ketones
- C Alkali metals
- D Halides
Explanation: The correct answer to the question is: Halides
Question 628: Which one of the following alcohols will be formed when ethyl magnesium bromide reacts with acetone ?
- A tertiary alcohol
- B primary alcohol
- C secondary alcohol
- D dihydric alcohol
Explanation: The correct answer to the question is: tertiary alcohol
Question 629: The metallurgical process in which a metal is obtained in a fused state is called__________?
- A roasting
- B froth floatation
- C smelting
- D calcinations
Explanation: The correct answer to the question is: smelting
Question 630: The gas which cannot be dried by conc. H2SO4 ?
- A CO2
- B H2S
- C SO2
- D C2H4
Explanation: The correct answer to the question is: H2S
Question 631: Ce58 is a member of__________?
- A f-block
- B P-block
- C S-block
- D d-block
Explanation: The correct answer to the question is: f-block
Question 632: Fluorine can react with_________________?
- A Xe
- B All of the above
- C Rn
- D Kr
Explanation: The correct answer to the question is: All of the above
Question 633: FeSO4 forms brown ring with________________?
- A N2O3
- B N2O
- C NO
- D NO2
Explanation: The correct answer to the question is: NO
Question 634: The Branch of chemistry dealing with brewing and distilling is called _______ ?
- A Zymurgy
- B Zygology
- C Zootaxy
- D Zymology
Explanation: The correct answer to the question is: Zymurgy
Question 635: In diaphragm cell hydrogen is discharged by the reduction of__________________?
- A Na+
- B HCI
- C NaCl
- D Water
Explanation: The correct answer to the question is: Water
Question 636: The rays that have negative charge are ___________?
- A Anode Rays
- B Canal Rays
- C Cathode Rays
- D Gamma Rays
Explanation: The correct answer to the question is: Cathode Rays
Question 637: What is the formula of Silver nitrate?
- A AgNO4
- B AgNO3
- C AgNO
- D AgNO2
Explanation: The correct answer to the question is: AgNO3
Question 638: Coal gas is made up of mostly ________ & _________?
- A Carbonmonoxdide & water
- B Hydrogen & Water
- C Hydrogen & Methane
- D Hydrogen & Carbon dioxide
Explanation: The correct answer to the question is: Hydrogen & Methane
Question 639: Removal of CO2 is called_____________________?
- A esterification
- B hydroxylation
- C carboxylation
- D decarboxylation
Explanation: The correct answer to the question is: decarboxylation
Question 640: The oxidation state of cu which are expected to be diamagnetic
- A Cu+1
- B Cu+4
- C Cu+3
- D Cu+2
Explanation: The correct answer to the question is: Cu+1
Question 641: The marsh gas is ___________?
- A Propane
- B Ethane
- C Methane
- D Butane
Explanation: The correct answer to the question is: Methane
Question 642: The maximum oxidation shown by manages is_________?
- A +7
- B +5
- C +4
- D +2
Explanation: The correct answer to the question is: +7
Question 643: The oxides of beryllium BeO is_______________?
- A Amphoteric
- B Basic
- C Acidic
- D Neutral
Explanation: The correct answer to the question is: Amphoteric
Question 644: When one hydrogen atom of alkane is removed then it is called________________?
- A alkene
- B saturated hydrocarbon
- C alkyl
- D aldehyde
Explanation: The correct answer to the question is: alkyl
Question 645: Which of the following is a neutral particle ?
- A Neutron
- B Electron
- C Proton
- D Alpha particle
Explanation: The correct answer to the question is: Neutron
Question 646: Boron in soil has been considered micronutrient for_________________?
- A Proper growth of plants
- B Alkalinity of soil
- C All
- D Soil porocity
Explanation: The correct answer to the question is: Proper growth of plants
Question 647: What is the Chemical formula of Zinc Hydroxide _________ ?
- A ZnOH
- B Zn2(OH)3
- C ZNO2
- D Zn(OH)2
Explanation: The correct answer to the question is: Zn(OH)2
Question 648: The halogen which reacts spontaneously with gold (Au) to form Au+3 is ________________?
- A I2
- B Cl2
- C Br2
- D F2
Explanation: The correct answer to the question is: Cl2
Question 649: Benzene gives mainly_________?
- A Addition reaction
- B Substitution reactions
- C All of these
- D Halogenation
Explanation: The correct answer to the question is: Substitution reactions
Question 650: In which compound nitrogen has maximum oxidation state____________________?
- A NO2
- B N2O
- C HNO2
- D HNO3
Explanation: The correct answer to the question is: HNO3