Que- Which is true about Zn-Cu galvanic cell?
a. Reduction occurs at anode
b. K+ ion transfer from salt bridge to left beaker of ZnSO4
c. Oxidation occurs at cathode
d. Anode is negatively charged
Answer- Anode is negatively charged
Que- Which is the unit of (K) rate constant for zero order reaction?
a. s-1
b. mol dm-3 s-1
c. mol-1 dm3 s-1
d. mol-2 dm6 s-1
Answer- mol dm-3 s-1
Que- Nitrates of which pair gives different products on thermal decomposition
a. Na K
b. Mg Ca
c. Li Na
d. Li Ca
Answer- Li Na
Que- Which is carnalite
a. KCI
b. NaCI
c. KCI MgCl2 6H2O
d. Na2CO3. 10H2O
Answer- KCI MgCl2 6H2O
Que- Keeping in view the size of atom which is in correct order
a. Mg > Sr
b. Ba > Mg
c. Lu > Ce
d. CI > 1
Answer- Ba > Mg
Que- Which one does not give borax bead test
a. Copper sulphate
b. Barium sulphate
c. Cobalt sulphate
d. Nickel sulphate
Answer- Barium sulphate
Que- Which one is not the use of silicones
a. Lubricant
b. Water repellent film
c. Rubber sheet
d. Medicine
Answer- Medicine
Que- The most reactive allotropic form of phosphorus is
a. White
b. Redox potential
c. Black
d. Violet
Answer- White
Que- Chemical composition of cinnabar is
a. FeS2
b. HgS
c. PbS
d. ZnS
Answer- HgS
Que- Which molecule has the highest bond energy among the halogens
a. Fluorine
b. Chlorine
c. Iodine
d. Bromine
Answer- Chlorine
Que- When chlorine is passed through hot solution of caustic soda the reaction is said as
a. Displacement
b. Reduction
c. Disproportionation reaction
d. Double displacement reaction
Answer- Disproportionation reaction
Que- The most paramagnetic element is
a. Iron
b. Cobalt
c. Chromium
d. Manganese
Answer- Iron
Que- In the complex [Cr(OH)3(H2O)3] the coordination number is
a. 2
b. 3
c. 4
d. 6
Answer- 6
Que- Which one of the following looks odd
a. H2SO4
b. KMnO4
c. H2S
d. K2CrO4
Answer- H2S
Que- A great variety of the organic compounds is due to its property of carbon
a. Show tetravalency
b. Exhibit catenation
c. Show isomerism
d. Can form multiple bonds
Answer- Exhibit catenation
Que- In 1 - pentene -4- yne the carbon exhibit hybridization
a. sp3 - sp2
b. sp2 - sp
c. sp2 - sp
d. sp3 - sp2 - sp
Answer- sp3 - sp2 - sp
Que- Vinyl acetylene combines with hydrochloric acid produces
a. Diviny1 acetylene
b. Ethylidine dichloride
c. Chloroprene
d. 1 - 3 - 3 - trichloro butane
Answer- Chloroprene
Que- When benzene is heated in air with V2O5 at 450Degree Centigrade yields
a. Phenol
b. Maleic anhydride
c. Glyoxal
d. Benzoic acid
Answer- Maleic anhydride
Que- When toluene reacts with chlorine in sunlight the first major product is
a. Benzy1 chloride
b. Benzal dichloride
c. O-chlorotoluene
d. O-chlorotoluene and P-chlorotoluene
Answer- Benzy1 chloride
Que- Which one of the following will be sulphonated readily?
a. Chlorobenzene
b. Toluene
c. Nitrobenzene
d. Benzene
Answer- Toluene
Que- Which one of the following is not a good leaving group ?
a. HSO4-
b. Cl-
c. OH-
d. Br-
Answer- OH-
Que- When CO2 is made to react with ethy1 magnesium iodide in dry ether followed by acid hydrolysis yields
a. Carboxylic acid
b. Ethanoic acid
c. Propanoic acid
d. Butanoic acid
Answer- Propanoic acid
Que- The process of fermentation involves all the enzymes except
a. Diastase
b. Invertase
c. Zymase
d. Sucrase
Answer- Sucrase
Que- Ethy1 chloride on reduction in the presence of Zn/HCI produces
a. n. butane
b. Ethanol
c. Ethane
d. Diethy1 ether
Answer- Ethane
Que- Which one does not exhibit aldol condensation
a. Ethanal
b. Acetone
c. Benzaldehyde
d. Butanone
Answer- Benzaldehyde
Que- For industrial preparation of CH3CHO catalytic promoter is
a. PdCl2
b. Cu2Cl2
c. CuCl2
d. PbCl2
Answer- Cu2Cl2
Que- The common name of propane -1 3-dioic acid is
a. Oxalic acid
b. Succinic acid
c. Malonic acid
d. Fumaric acid
Answer- Malonic acid
Que- Which of the following is not a fatty acid?
a. Propanoic acid
b. Acetic acid
c. Phthalic acid
d. Butanoic acid
Answer- Phthalic acid
Que- Industrial materials thermal power stations are coated with
a. Polyester resins
b. Epoxy paints
c. polyamide resins
d. Polyvinyl chloride
Answer- Epoxy paints
Que- Which one of the following fertilizers provides the nitrogen and phosphorus to the plant?
a. Urea
b. Calcium superphosphate
c. Diammonium phosphate
d. Potassium nitrate
Answer- Urea
Que- Chlorination of water may be harmful if the water contains
a. Ammonia
b. Dissolved oxygen
c. Carbon dioxide
d. All
Answer- Carbon dioxide
Que- Which of the following technique is used for the separation of insoluble particles from liquids?
a. Filtration
b. Crystallization
c. Solvent extraction
d. Chromatography
Answer- Filtration
Que- Which of the following way in used for classification of chromatography?
a. Shape
b. Phase
c. Mechanism
d. All
Answer- All
Que- Fluted filter paper is used to
a. Filter hot solution
b. Avoid premature crystallization
c. Increase the rate of filtration
d. Decrease the area
Answer- Increase the rate of filtration
Que- Safe and the most reliable method of drying crystals is through
a. Filter paper
b. Vacuum desiccators
c. Oven
d. None of these
Answer- Vacuum desiccators
Que- A substance having very high vapour pressure at its melting point on heating will show
a. Melting
b. Sublimation
c. Decomposition
d. Condensation
Answer- Sublimation
Que- A process controlled by Distributive law is
a. Crystallization
b. Sublimation
c. Solvent extraction
d. Filtration
Answer- Solvent extraction
Que- A technique of partition chromatography in which the solvent is in a pool at the bottom of container
a. Adsorption chromatography
b. Ascending chromatography
c. Radial chromatography
d. Descending chromatography
Answer- Ascending chromatography
Que- Different components of a mixture have different Rf values due to
a. Polar solvent used
b. Combination of solvents used
c. Their different distribution coefficients in the solvent
d. Distributive law
Answer- Their different distribution coefficients in the solvent
Que- Branch of chemistry that deals with the complete qualitative and quantitative analysis of a substance is
a. Stoichio chemistry
b. Physical chemistry
c. Analytical chemistry
d. Quantum chemistry
Answer- Analytical chemistry
Que- Identification of the components of a sample is
a. Quantitative analysis
b. Qualitative analysis
c. Stoichiometry
d. Physical chemistry
Answer- Qualitative analysis
Que- Estimation of amounts of different components in a sample is
a. Quantitative analysis
b. Qualitative analysis
c. Stochiometery
d. Physical chemistry
Answer- Quantitative analysis
Que- The technique used to separate components of mixture in solid phase.
a. Crystallization
b. Filtration
c. Sublimation
d. Solvent extraction
Answer- Sublimation
Que- The solid which is left over the filter paper as a result of filtration
a. Insoluble particles
b. residue
c. crystals
d. mud
Answer- residue
Que- Size of filter paper is selected according to the amount of
a. solution
b. amount of insoluble solute
c. amount of soluble solute
d. Amount of solvent
Answer- amount of insoluble solute
Que- Gooch Crucibles are made up of
a. plastic
b. fibre
c. porcelain
d. steel
Answer- porcelain
Que- Rate of filtration can be increased by applying gentle suction
a. Gooch crucible
b. Filter paper
c. Sintered crucible
d. All of the above
Answer- Filter paper
Que- Sintered crucible is made up of
a. Plastic
b. glass
c. porcetain
d. fiber
Answer- glass
Que- The tip of funnel should touch the wall of the breaker in order to avoid
a. Inconsistent flow of filtration
b. splashing
c. premature crystallization
d. all of above
Answer- splashing
Que- Separation of a solid from its hot saturated solution by cooling is called
a. vapourization
b. solvent extraction
c. filtration
d. crystallization
Answer- crystallization
Que- In crystallization if the solvent is inflammable then direct heating is
a. needed
b. avoided
c. depends on temperature
d. crystallization does not involve heating
Answer- avoided
Que- Which of the following technique is simple and efficient to purify a substance
a. Filtration
b. Sublimation
c. Crystallization
d. Solvent extraction
Answer- Solvent extraction
Que- In solvent extraction ether is used to separate products of organic synthesis from
a. water
b. iodine
c. hydrochloric acid
d. gases
Answer- water
Que- 95% ethanol is called
a. methylated spirit
b. wood spirit
c. rectified spirit
d. absolute alcohol
Answer- rectified spirit
Que- The use of CaCl2 and PCl5 in the process of crystallization is as a
a. oxidizing agent
b. reducing agent
c. drying agent
d. colouring agent
Answer- drying agent
Que- Ratio of the amount of solute in organic and aqueous solvent is
a. Retardation factor
b. Distribution co-efficient
c. Distribution in aqueous solution
d. All statements are wrong
Answer- Distribution co-efficient
Que- Without suction pump filtration is
a. Fast process
b. Slow process
c. Rapid process
d. All are possible
Answer- Slow process
Que- Animal charcoal adsorbs the coloured
a. impurities
b. crystals
c. solvents
d. both a & b
Answer- impurities
Que- Direct conversion of solids into vapours is called
a. Solvent extraction
b. sublimation
c. crystallization
d. vaporization
Answer- sublimation
Que- Crystallization does not involve
a. heating
b. sublimation
c. cooling
d. vaporization
Answer- sublimation
Que- In CCI4 I2 shows
a. Red colour
b. Purple colour
c. Blue colour
d. Yellow colour
Answer- Purple colour
Que- Repeated extraction using small portions of solvents is more
a. Reliable
b. Efficient
c. Rapid
d. slow
Answer- Efficient
Que- Silica gel and alumina are used as
a. Mobile phase
b. Stationary phase
c. Mixed phase
d. Single phase
Answer- Stationary phase
Que- Shaking two immiscible liquids increases
a. Length of contact
b. Volume of contact
c. Area of contact
d. all of above
Answer- Area of contact
Que- The solvent or mixture of solvents used for separation of compounds is called
a. Stationary phase
b. Mobile phase
c. Dynamic phase
d. Static phase
Answer- Mobile phase
Que- Which is not a sublime material
a. Iodine
b. Benzoic acid
c. Ammonium chloride
d. Potash alum
Answer- Potash alum
Que- Sintered glass is a porous material used for
a. absorption
b. adsorption
c. filtration
d. sublimation
Answer- filtration
Que- Selection of filter paper depends on size of particles to be
a. filtered
b. dried
c. decolorized
d. decanted
Answer- filtered
Que- The solution remaining after the formation of crystals is called
a. Mother liquor
b. Dilute solution
c. Residue
d. both a & b
Answer- Mother liquor
Que- Which is not related pair of term used in analytical techniques
a. Filtrate residue
b. Sublimate sublimation
c. Drying desiccator
d. Separating funnel mother liquor
Answer- Sublimate sublimation
Que- The major steps involved in complete quantitative analysis are
a. 2
b. 3
c. 4
d. 5
Answer- 4
Que- Main source of organic compounds is
a. Animal
b. Fossil
c. Coal
d. Plants
Answer- Animal
Que- Octane number can be improved by
a. Isomerization
b. Adding (C2H5)4 Pb
c. Adding (CH3)4 Pb
d. All
Answer- All
Que- Hydro carbons which burn with smoky flame are called
a. Aliphatic
b. Alicyclic
c. Aromatic
d. Aldehyde
Answer- Aromatic
Que- Octane number 2 2 4-trimethyl pentane is
a. 100
b. 90
c. 80
d. 70
Answer- 100
Que- Propene can exhibit
a. cis-trans isomerism
b. geometric isomerism
c. both a & b
d. none of the above
Answer- none of the above
Que- Geometric isomerism is usually found in
a. Alkanes
b. Alkenes
c. Alkynes
d. Esters
Answer- Alkenes
Que- Pentane and 2-methyl butance have the same
a. Boiling point
b. Melting point
c. Percentage composition
d. Structural formula
Answer- Percentage composition
Que- Organic compounds that are essentially nonpolar and exhibit weak intermolecular forces have
a. Low melting points
b. Low vapour pressure
c. High boiling points
d. High electrical conductivity
Answer- Low melting points
Que- The first organic compound was synthesized in laboratory by
a. Wohler
b. Kolbe
c. Berzilius
d. Berthelot
Answer- Wohler
Que- According to vital force theory
a. Oorganic compounds can be synthesized from inorganic compounds
b. organic compounds cannot be synthesized from inorganic compounds
c. organic compounds can be synthesized by animals
d. organic compounds can be synthesized by plants
Answer- organic compounds cannot be synthesized from inorganic compounds
Que- First organic compound synthesized in laboratory was
a. tartaric acid
b. ethyl alcohol
c. methanol
d. urea
Answer- urea
Que- A double bond consists of
a. Two sigma bonds
b. Two Pi bonds
c. One sigma and one Pi bonds
d. One sigma and two Pi bonds
Answer- One sigma and one Pi bonds
Que- The property of carbon chain formation is called
a. catenation
b. hybridization
c. polymerization
d. solvation
Answer- catenation
Que- Chemical properties of first member of homologous series with respect to other members are
a. same
b. different
c. depends upon number of C atoms
d. depends upon number of H atoms
Answer- same
Que- The organic compounds having very high molecular weight are called
a. carboxylic acids
b. ketones
c. aldehydes
d. polymers
Answer- polymers
Que- Compounds having same molecular formula but differ in structural formula are called
a. polymer
b. monomer
c. isomer
d. allotropes
Answer- isomer
Que- Rate of reactions of most organic compounds are
a. very slow
b. very fast
c. slow
d. no regular character present
Answer- slow
Que- Organic compounds are soluble in
a. polar solvent
b. non-polar solvent
c. alkalies
d. water
Answer- non-polar solvent
Que- Coal is produced after a long time decay of
a. animals
b. fossils
c. wood
d. all of the above
Answer- wood
Que- Methane is used in power generation in chemical industries being a
a. natural gas
b. good caloric value
c. cheaper
d. All
Answer- cheaper
Que- Crude oil is blackish coloured liquid produced after the decay of organic matter present between
a. earth layer
b. mountains
c. sedimentary rocks
d. rocks
Answer- sedimentary rocks
Que- The precess in which larger molecule with higher molecular weight breaks down into smaller moleucles with lower molecular weight
a. polymerization
b. pyrolysis
c. isomerism
d. no such process occurs
Answer- pyrolysis
Que- At low temperature and pressure cracking can be done in presence of catalyst
a. Al2O3
b. Fe2O3
c. Al2O3 and SiO2
d. Fe2O3 and SiO2
Answer- Al2O3 and SiO2
Que- The metallic sound produced by engine due to the pre-ignition of fuel is called
a. knocking
b. reforming
c. cracking
d. a and c
Answer- knocking
Que- Which one of the following compounds shows intense knocking?
a. n-pentane
b. iso-heptane
c. iso-octane
d. n-heptane
Answer- n-heptane
Que- Which of the following can be used as anti-knocking agent.
a. PbCl2
b. (C2H5)4 Pb
c. (C2H5)2 Pb
d. all of the above
Answer- (C2H5)4 Pb
Que- Isomerism which is present only in alkene is
a. structural isomerism
b. metamerism
c. cis-trans isomerism
d. both b and c
Answer- cis-trans isomerism
Que- A single atom or group of atoms which gives characteristic properties to a compound is called
a. radical
b. hydrocarbon
c. functional group
d. ion
Answer- functional group
Que- Compound containing benzene ring in their structure are
a. aliphatic
b. aromatic
c. carboxylic acid
d. carbohydrates
Answer- aromatic