Que- Phosphene gas will be produced if phosphorous acid is subjected to___________________?
a. Oxidation
b. Reduction
c. Decomposition
d. Both b & c
Answer- Both b & c
Que- Which one of following is not a property of pure quartz ?
a. Coloured solid
b. Brittle
c. Hard
d. All of above
Answer- Coloured solid
Que- Which of the following does not contain phosphorus ?
a. Yolk of egg
b. Bone
c. Nerves
d. Steel
Answer- Steel
Que- Which one of the following is not the use of graphite ?
a. Lead pencils
b. Abrasive
c. Lubricant
d. Electrode of electrolytic cell
Answer- Abrasive
Que- The composition of brown ring in nitrate test is_________________?
a. FeSO4.No
b. FeSO4.No2
c. FeSO4.No3
d. FeSO4.N2o
Answer- FeSO4.No
Que- Which one of the following compounds usually smells like garlic ?
a. P2O3
b. P2O5
c. H3PO3
d. All have same smell
Answer- P2O3
Que- The element of group VIA which is a non-metal is________________?
a. S
b. Se
c. Te
d. Po
Answer- S
Que- Which of the elements show passivity when treated with conc. HNO3?
a. Fe
b. A
c. Cr
d. All of the above
Answer- All of the above
Que- The gas which cannot be dried by conc. H2SO4 ?
a. SO2
b. H2S
c. CO2
d. C2H4
Answer- H2S
Que- FeSO4 forms brown ring with________________?
a. N2O3
b. NO2
c. NO
d. N2O
Answer- NO
Que- Oxygen does not react with all except_________________?
a. Alkali
b. Acid
c. Water
d. Metals
Answer- Metals
Que- In which compound nitrogen has maximum oxidation state____________________?
a. N2O
b. NO2
c. HNO2
d. HNO3
Answer- HNO3
Que- Among the halogens the rare element is________________?
a. Fluorine
b. Chlorine
c. Astatine
d. Iodine
Answer- Astatine
Que- Vander Waals forces are stronger in_______________?
a. F2
b. Cl2
c. Br2
d. I2
Answer- I2
Que- The most powerful oxidizing agent among the halogens is__________________?
a. F2
b. Cl2
c. Br2
d. I2
Answer- F2
Que- The halogen which reacts spontaneously with gold (Au) to form Au+3 is ________________?
a. F2
b. Cl2
c. Br2
d. I2
Answer- Cl2
Que- The halogen which reacts very slowly with halogen is________________?
a. Fluorine
b. Chlorine
c. Bromine
d. Iodine
Answer- Iodine
Que- The halogen having highest electron affinity is_____________________?
a. Fluorine
b. Chlorine
c. Bromine
d. Iodine
Answer- Chlorine
Que- Bromine can be liberated from KBr solution by the action of _______________?
a. Iodine solution
b. Chlorine
c. NaCl
d. Ki
Answer- Chlorine
Que- Consider the following reaction- 2KCIO3 + H2C2O4 + H2SO4 ? K2SO4 + 2H2O + 2CO2 + Oxide Which oxide of chlorine is produced in the above reaction ?
a. Cl2O
b. ClO2
c. Cl2O6
d. Cl2O7
Answer- ClO2
Que- Consider the following reaction- 3Cl2 + 6NaOH ? NaClO3 + 5NaCl + 3H2O This reaction is_______________?
a. Displacement reaction
b. Double displacement reaction
c. Disproportionation reaction
d. Reduction reaction
Answer- Disproportionation reaction
Que- Which of the halogen can displace other three elements ?
a. Flourine
b. Chlorine
c. Iodine
d. Bromine
Answer- Flourine
Que- The chemical formula of sodium hypochlorite is________________?
a. NaCLO
b. NaClO2
c. NaClO3
d. NaClO4
Answer- NaCLO
Que- Bleaching powder is not used for bleaching________________?
a. Cotton
b. Costly fabrics
c. Linen
d. Paper pulb
Answer- Costly fabrics
Que- Which of the following is not use of compounds of Fluorine________________?
a. SbF3 is used for manufacture of pottery
b. Sodium fluoroacetate is a rat poison
c. Cu F2 is used in ceramic industry
d. None of the above
Answer- None of the above
Que- Photographic plates are coated with a thin film of _________________?
a. AgNO3
b. AgI
c. AgCl
d. AgBr
Answer- AgBr
Que- Indicate the correct statement__________________?
a. Cl2 is the strongest oxidizing agent
b. I2 is a volatile solid
c. Br2 is more reactive than Cl2
d. Cl2 is insoluble in water
Answer- I2 is a volatile solid
Que- Which one of the following halogens is present in Teflon________________?
a. I2
b. Br2
c. Cl2
d. F2
Answer- F2
Que- Which is the paramagnetic oxide of chlorine ?
a. Cl2O7
b. Cl2O6
c. ClO2
d. all
Answer- ClO2
Que- The colour of chlorine gas is_______________?
a. pale yellow
b. freenish yellow
c. reddish brown
d. grayish black
Answer- freenish yellow
Que- Which of the following statements is incorrect about fluorine_______________?
a. fluorine is restricted to -1 oxidation state
b. fluorine follows octet rule and as well as extended octet rule
c. fluorine has lowest dissociation energy among the halogens
d. both B and C
Answer- both B and C
Que- Which one of the following is the weakest acid in water__________________?
a. HF
b. HCI
c. HBr
d. HI
Answer- HF
Que- Which of the following represents the correct electronic configuration of VII A group elements in the ground state ?
a. ns2p2
b. ns2p4
c. ns2p5
d. ns2p6
Answer- ns2p5
Que- Which is the strongest acid ?
a. HCIO
b. HCIO2
c. HCIO3
d. HCIO4
Answer- HCIO4
Que- Bleaching powder is an example of________________?
a. Normal salt
b. Double salt
c. Mixed salt
d. Complex
Answer- Mixed salt
Que- Which of the following oxides of iodine is used for quantitative analysis of CO ?
a. I2O4
b. I4O2
c. I2O5
d. All are equally useful
Answer- I2O5
Que- Which of the halogen has highest electronegativity ?
a. Fluorine
b. Chlorine
c. Bromine
d. Iodine
Answer- Fluorine
Que- Which of the following statements is incorrect about halogens ?
a. All are non-metals
b. All the halogens have electronic conviguration ns2p5
c. They have high electron attinity and ionization energy
d. All the halogens react with noble gases to form their halides
Answer- All the halogens react with noble gases to form their halides
Que- Fluorine can react with_________________?
a. Xe
b. Kr
c. Rn
d. All of the above
Answer- All of the above
Que- Which of the following is the weakest reducing agent ?
a. HF
b. HBr
c. HC
d. HI
Answer- HF
Que- In which compound of Xenon the oxidation state of Xenon is + 6?
a. XeF4
b. XeOF4
c. XeOF2
d. Na4XeO6
Answer- XeOF4
Que- The anhydride of HCIO4 is_________________?
a. Cl2O
b. Cl2O6
c. ClO2
d. Cl2O7
Answer- Cl2O7
Que- Alkanes containing a methyl group on main chain at 2nd carbon are called________________?
a. iso-alkane
b. normal-alkane
c. neo-alkane
d. branched-alkane
Answer- iso-alkane
Que- Alkanes are also known as________________?
a. saturated hydrocarbon
b. unsaturated hydrocarbon
c. paraffins
d. both A & C
Answer- paraffins
Que- Hydrogenolysis results in the formation of________________?
a. alkane
b. alkene
c. alkyne
d. aldehydes
Answer- alkane
Que- Removal of CO2 is called_____________________?
a. carboxylation
b. decarboxylation
c. esterification
d. hydroxylation
Answer- decarboxylation
Que- Molozonide is unstable and changes into ozonide on_________________?
a. reduction
b. oxidation
c. hydrolysis
d. rearrangement
Answer- rearrangement
Que- R-Mg-Br is called___________________?
a. Grignard reagent
b. Metallic alkyl halide
c. Both A & B
d. Alkyl
Answer- Both A & B
Que- Which of the following is the most reactive_________________?
a. ethane
b. ethyne
c. ethene
d. benzene
Answer- ethene
Que- Introduction of nitro group in a molecule is called___________________?
a. nitration
b. halogenation
c. sulphonation
d. amination
Answer- nitration
Que- The gas used in manufacturing of urea fertilizer__________________?
a. C2H6
b. C2H4
c. C2H2
d. CH4
Answer- CH4
Que- Which of the following will be acidic_____________?
a. propyne
b. 1-butyne
c. ethyne
d. all of the above
Answer- all of the above
Que- Alkenes are produced from dehalogenation of________________?
a. dihalo alkane
b. trihalo alkane
c. vicinal dihalo alkane
d. vicinal trihalo alkane
Answer- vicinal dihalo alkane
Que- In unsaturated hydrocarbons electrons favour___________________?
a. less reactivity
b. addition reactions
c. substitution reactions
d. none
Answer- addition reactions
Que- Which one is Chloroform_________________?
a. CH2Cl2
b. CH3Cl
c. CHCl3
d. CCl4
Answer- CHCl3
Que- Which is used for artificial ripening of fruit ?
a. ethane
b. ethene
c. ethyne
d. methane
Answer- ethene
Que- Preparation of vegetable ghee involves_________________?
a. halogenation
b. hydroxylation
c. hydrogenation
d. hydration
Answer- hydrogenation
Que- Which is methyl cyanide_________________?
a. CH3NH2
b. CH3NO2
c. CH3CN
d. CH2 = CH – CN
Answer- CH3CN
Que- When one hydrogen atom of alkane is removed then it is called________________?
a. alkene
b. alkyl
c. aldehyde
d. saturated hydrocarbon
Answer- alkyl
Que- Sabatier Senderns reaction involve _____________ in presence of Ni?
a. Aalkene & H2
b. alkene & O2
c. alkene & N2
d. alkyne & Cl2
Answer- Aalkene & H2
Que- Clemmensens reduction infolves the reduction of___________________?
a. ketone
b. aldehyde
c. alkane
d. all of the above
Answer- ketone
Que- Soda lime is a mixture of____________________?
a. CaO and KOH
b. CaO and NaOH
c. NaOH and Na2O
d. Na2O and KOH
Answer- CaO and NaOH
Que- Dehalogenation of ethyl tetrahalide will give____________________?
a. ethene
b. ethyne
c. ethyl halide
d. all of the above are possible
Answer- ethyne
Que- Upto ___________________ C atoms alkanes are gases?
a. 2
b. 3
c. 4
d. 6
Answer- 4
Que- Incomplete oxidation of methane in the limited supply of air forms ?
a. CO2 and H2O
b. CH3OH
c. CO + H2 + C
d. CO + H2O + C
Answer- CH3OH
Que- Order of ease of halogenation in alkane is________________?
a. I2>Cl2>Br2>F2
b. F2>Cl2>I2>Br2
c. F2>Cl2>Br2>I2
d. Cl2>F2>Br2>I2
Answer- F2>Cl2>Br2>I2
Que- General formula of alkyne is______________?
a. CnH2n + 2
b. CnH2n – 2
c. CnH2n
d. CnH2n + 2
Answer- CnH2n – 2
Que- Removal of halogen and hydrogen atom is_________________?
a. halogenation
b. dehalogenation
c. dehydrohalogenation
d. hydrohalogenation
Answer- dehydrohalogenation
Que- Reactivity due to pi-electrons is present in_________________?
a. alkane
b. alkene
c. alkyne
d. both B & C
Answer- both B & C
Que- Raney nickel is prepared from ______________________ by treating with caustic soda?
a. Ni-Cu alloy
b. Ni-Fe alloy
c. Ni-Al alloy
d. Ni-Mg alloy
Answer- Ni-Al alloy
Que- Vinylacetylene combines with HCI to form___________________?
a. polyacetylene
b. benzene
c. chloroprene
d. divinyl acetylene
Answer- chloroprene
Que- Which C-X bond has the highest bond energy per mole ?
a. C-F
b. C-C
c. C-Br
d. C-I
Answer- C-F
Que- Ethyl chloride with nascent hydrogen produces_________________?
a. methane
b. ethane
c. propane
d. butane
Answer- ethane
Que- The number of molecules taking part in the rate determining step is called___________________?
a. Order of reaction
b. Rate of reaction
c. Mole of a reaction
d. Extent of a reaction
Answer- Order of reaction
Que- What will be the order of reaction of a reaction whose rate can be expressed as R = K [A] [B] ?
a. Zero
b. One
c. Two
d. Three
Answer- Two
Que- What is the order of kinetics in the SN1 mechanism ?
a. Zero
b. First
c. Second
d. Third
Answer- First
Que- The rate of E1 reaction depends upon______________________?
a. the concentration of substrate
b. the concentration of nucleophile
c. the concentration of substrate as well as nucleophile
d. base the concentration of substrate as well as nucleophile
Answer- the concentration of substrate
Que- Elimination bimolecular reactions involve____________________________?
a. first order kinetics
b. second order kinetics
c. third order kinetics
d. zero order kinetics
Answer- second order kinetics
Que- Grignard reagent is reactive due to___________________?
a. the presence of halogen atom
b. the presence of magnesium atom
c. the polarity of C-Mg bond
d. all
Answer- the polarity of C-Mg bond
Que- The ether used in Wurtz synthesis is__________________?
a. acidic
b. basic
c. aqueous
d. dry
Answer- dry
Que- Which one of the following species is not an electrophile ?
a. NH3
b. Br+
c. H+
d. BF3
Answer- NH3
Que- Which one of the following alcohols will be formed when ethyl magnesium bromide reacts with acetone ?
a. primary alcohol
b. secondary alcohol
c. tertiary alcohol
d. dihydric alcohol
Answer- tertiary alcohol
Que- Which one of the following molecules does not form alcohol when reacts with Grignard reagent ?
a. formaldehyde
b. acetaldehyde
c. propanone
d. carbondioxide
Answer- carbondioxide
Que- In primary alkyl halides the halogen atom is attached to a carbon which is further attached to how many carbon atoms__________________?
a. two
b. three
c. one
d. four
Answer- one
Que- The best method of preparation of alkyl halides is a reaction of alcohol with__________________?
a. Zn / HCI
b. SOCl2 / Pyridine
c. PCI3
d. PCI5
Answer- SOCl2 / Pyridine
Que- 50% inversion of configuration of molecules take place in a___________________?
a. E1 – reaction
b. E2 – reaction
c. SN1 – reaction
d. SN2 – reaction
Answer- SN1 – reaction
Que- Which alkyl halide has the highest reactivity for a particular alkyl group ?
a. R-F
b. R-C
c. R-Br
d. R-I
Answer- R-I
Que- Which one is not a nucleophile ?
a. C2H5O-
b. SCN-
c. NH3
d. H3C+
Answer- H3C+
Que- Which alkyl halide out of the following may follow both SN1 and SN2 mechanism ?
a. CH3-X
b. (CH3)3 C-CH2 – X
c. (CH3)2 CH – X
d. (CH3)3 C – X
Answer- (CH3)2 CH – X
Que- When two moles of ethyl chloride react with two moles of sodium in the presence of ether what will be formed ?
a. 2 moles of ethane
b. 1 mole of ethane
c. 2 moles of butane
d. 1 mole of butane
Answer- 1 mole of butane
Que- When CO2 is made to react with ethyl magnesium iodide followed by acid hydrolysis the product formed is _________________?
a. propane
b. propanoic acid
c. propanal
d. propanol
Answer- propanoic acid
Que- SN2 reaction can be best carried out with__________________?
a. primary alkyl halide
b. secondary alkyl halide
c. tertiary alkyl halide
d. all
Answer- primary alkyl halide
Que- For which mechanisms the first step involved is the same ?
a. E1 + E2
b. E2 + SN2
c. E1 and SN1
d. SN1 and SN2
Answer- E1 and SN1
Que- Alkyl halides are considered to be very reactive compounds towards nucleophile because_________________?
a. they have an electrophilic carbon
b. they have an electrophilic carbon & a good leaving group
c. they have an electrophilic carbon & a bad leaving group
d. they have a nucleophilic carbon & a good leaving group
Answer- they have an electrophilic carbon & a good leaving group
Que- Which one of the following reactants will be required to form straight chain alcohol by using Grignard reagent________________?
a. formaldehyde
b. ketone
c. ethylene epoxide
d. both A & C
Answer- both A & C
Que- Ethylene epoxide treated with Grignards reagent followed by acid hydrolysis yield __________________?
a. primary alcohol
b. secondary alcohol
c. tertiary alcohol
d. dihydric alcohol
Answer- primary alcohol
Que- Alkyl halides undergo a type of reaction_________________?
a. Nucleophilic substitution
b. Nucleophilic addition
c. Elimination
d. both A & C
Answer- both A & C
Que- Which one of the following is termed as benzul alcohol ?
a. C6H5OH
b. C6H5CH(OH)2
c. C6H5CH2OH
d. C6H5COOH
Answer- C6H5CH2OH
Que- Which one of the following is also known as tartaric acid ?
a. 2 3-dihydroxy butance 1 4 -dioic acid
b. 2 3 -dihydroxy butanedioic acid
c. 2 3 -dihydroxy butanioc acid
d. 2 2 -dihydroxy butanoic acid
Answer- 2 3-dihydroxy butance 1 4 -dioic acid
Que- The residue obtained after the crystallization of sugar from concentrated sugar cane juice is called__________________?
a. Mother liquor
b. Filterate
c. Extract
d. Molasses
Answer- Molasses