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- Acetic anhydride can be obtained by treating ethyl alcohol with
a. P2O5
b. H2SO4
c. Both a and b
d. PCI5
Answer- Both a and b
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- Phosphorous acid upon thermal decomposition yields phosphoric acid and
a. Phosphine
b. Phosphorus
c. Water
d. Phosphorus pentoxide
Answer- Phosphine
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- P2O5 is a hygroscopic powder which sublimes at
a. 260Degree Centigrade
b. 360Degree Centigrade
c. 630Degree Centigrade
d. 620Degree Centigrade
Answer- 360Degree Centigrade
Que- The element of group VIA which is a non-metal is
a. S
b. Se
c. Te
d. Po
Answer- S
Que- Phosphoric acid is a weak acid and its basicity is
a. 1
b. 3
c. zero
d. 2
Answer- 3
Que- All the elements in group VIA are _______ in nature.
a. hygroscopic
b. metals
c. polymeric
d. all of above
Answer- polymeric
Que- Which allotropic form of phosphorous is the most stable?
a. White
b. black
c. red
d. Violet
Answer- black
Que- The gas which cannot be dried by conc. H2SO4
a. SO2
b. H2S
c. CO2
d. C2H4
Answer- H2S
Que- The chemical composition of cinnabar is
a. ZnS
b. PbS
c. HgS
d. FeS
Answer- HgS
Que- FeSO4 forms brown ring with
a. N2O3
b. NO2
c. NO
d. N2O
Answer- NO
Que- Oxygen and sulphur resemble in all except
a. Electronic conviguration of valence shell electrons
b. Show allotropy
c. Polymeric
d. Show same oxidation state
Answer- Show same oxidation state
Que- Oxygen does not react with all except
a. Alkali
b. Acid
c. Water
d. Metals
Answer- Metals
Que- Arsenic oxides are removed by passing through
a. Ferric hydroxide
b. Sodium hydroxide
c. Calcium hydroxide
d. Aluminium hydroxide
Answer- Ferric hydroxide
Que- In which compound nitrogen has maximum oxidation state
a. N2O
b. NO2
c. HNO2
d. HNO3
Answer- HNO3
Que- When sulphuric acid is treated with ethanol sulphuric acid behaves like
a. an acid
b. a dehydrating agent
c. an oxidizing agent
d. as sulphonating agent
Answer- a dehydrating agent
Que- Among the halogens the rare element is
a. Fluorine
b. Chlorine
c. Astatine
d. Iodine
Answer- Astatine
Que- The colour of chlorine gas is
a. pale yellow
b. freenish yellow
c. reddish brown
d. grayish black
Answer- freenish yellow
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- 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- The halogen which reacts spontaneously with gold (Au) to form Au+3 is
a. F2
b. Cl2
c. Br2
d. I2
Answer- Cl2
Que- Which one of the following is the weakest acid in water
a. HF
b. HCI
c. HBr
d. HI
Answer- HF
Que- The halogen which reacts very slowly with halogen is
a. Fluorine
b. Chlorine
c. Bromine
d. Iodine
Answer- Iodine
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- The halogen having highest electron affinity is
a. Fluorine
b. Chlorine
c. Bromine
d. Iodine
Answer- Chlorine
Que- Which is the strongest acid?
a. HCIO
b. HCIO2
c. HCIO3
d. HCIO4
Answer- HCIO4
Que- Bromine can be liberated from KBr solution by the action of
a. Iodine solution
b. Chlorine
c. NaCl
d. Ki
Answer- Chlorine
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 halogen can displace other three elements?
a. Flourine
b. Chlorine
c. Iodine
d. Bromine
Answer- Flourine
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- The chemical formula of sodium hypochlorite is
a. NaCLO
b. NaClO2
c. NaClO3
d. NaClO4
Answer- NaCLO
Que- Fluorine can react with
a. Xe
b. Kr
c. Rn
d. All of the above
Answer- All of the above
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- In which compound of Xenon the oxidation state of Xenon is + 6.
a. XeF4
b. XeOF4
c. XeOF2
d. Na4XeO6
Answer- XeOF4
Que- Photographic plates are coated with a thin film of :
a. AgNO3
b. AgI
c. AgCl
d. AgBr
Answer- AgBr
Que- The anhydride of HCIO4 is:
a. Cl2O
b. Cl2O6
c. ClO2
d. Cl2O7
Answer- Cl2O7
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- Coordination number of the transition element in [Pt Cl NO2 (NH3)4]2- is
a. 2
b. 6
c. 4
d. 8
Answer- 6
Que- K2 (Cu(CN)4) which one is correct
a. Potassium tetra cyano cupperate
b. Co-ordination number is 2
c. Ligand is positively charged
d. Central atom is present in avionic sphere
Answer- Central atom is present in avionic sphere
Que- The oxidation number of central metal atom in [Ni(CO)4] is
a. 0
b. 2
c. 4
d. 6
Answer- 4
Que- Group VIB of transition elements contains
a. Zn Cd Hg
b. Fe Ru Os
c. Cr Mo W
d. Mn Te Re
Answer- Cr Mo W
Que- The leements in which d or f orbitals are in the process of completion are
a. outer transition elements
b. inner transition elements
c. typical transition elements
d. transition elements
Answer- transition elements
Que- The location of transition elements is in between
a. lanthanides & actinides
b. s and p block elements
c. chalcogens and halogens
d. d and f block elements
Answer- s and p block elements
Que- The melting points and boiling points upto meddle of 3d- series
a. increases
b. decreases
c. remain same
d. no regular trend
Answer- increases
Que- Pure metal
a. corrode slowly
b. corrode rapidly
c. does not corrode easily
d. none of these
Answer- does not corrode easily
Que- Compounds attracted by applied strong magnetic field are called
a. diamagnetic
b. paramagnetic
c. good conductor
d. ferromagnetic
Answer- paramagnetic
Que- The correct electronic configuration of Cr is
a. [Ar]4s23d4
b. [Ar] 4s23d4
c. [Ar]4s03d5
d. [Ar]4s13d5
Answer- [Ar]4s13d5
Que- The oxidation state of transition elements is usually
a. variable
b. constant
c. single
d. infinite
Answer- variable
Que- When light is exposed to transition element then electrons jump from lower orbitals to higher orbitals in
a. orbitals of f-subshell
b. orbitals of d-subshell
c. orbitals of p-subshell
d. both a & b
Answer- both a & b
Que- Non-stoichiometric compounds of transition elements are called
a. hydrates
b. hydrides
c. binary compounds
d. interstitial compounds
Answer- interstitial compounds
Que- When a compound of transition element is dissolved in a solution of salt then it produces
a. simples ions
b. complex ions
c. double salts
d. strong anions
Answer- complex ions
Que- The specie which donates electrons to central metal atom in coordination sphere is called
a. anion
b. cation
c. Ligand is positively charged
d. acid
Answer- Ligand is positively charged
Que- The species which donate two electron pairs in a coordination compound is called
a. ligand
b. mono-dentate ligand
c. poly-dentate ligand
d. bi-dentate ligand
Answer- bi-dentate ligand
Que- Which of the following can form a chealate
a. ammine
b. oxalato
c. carbonyl
d. cyano
Answer- oxalato
Que- The central atom along with ligands is called
a. complex ion
b. coordination sphere
c. ligand
d. complex compound
Answer- coordination sphere
Que- The compound or complex ion which has a ring in its structure
a. polydentate ligand
b. chelate
c. monodentate ligand
d. hydrate
Answer- chelate
Que- In complex compounds the oxidation number is written in
a. English
b. Greek
c. Roman numeral
d. Hebrew
Answer- Roman numeral
Que- Geometry of the complex compounds usually depends upon
a. type of ligands
b. types of hybridization in the elements of ligands
c. hybridization of central metal
d. All of above
Answer- hybridization of central metal
Que- When the central atom of coordination compound is sp3d2 hybridization the expected geometry will be
a. tetrahedral
b. square planar
c. trigonal bipyramidal
d. octahedral
Answer- octahedral
Que- In pig iron the concentration of C-atom is
a. 12 --- 0.25%
b. 5 --- 4.5%
c. 0 --- 4.0%
d. 25 --- 2.5%
Answer- 5 --- 4.5%
Que- In the production of wrought iron Mg Si and P are removed in the form of
a. oxides
b. silicates
c. slag
d. carbonates
Answer- slag
Que- With impurities like P and S the open hearth furnace is lined with.
a. SiO2
b. Fe2O3
c. FeO
d. CaO MgO
Answer- CaO MgO
Que- Which is sold as fertilizer
a. CaSiO3
b. Na2SiO3
c. Ca3(PO4)2
d. MnSiO3
Answer- Ca3(PO4)2
Que- Any process of chemical decay of metals due to the action of surrounding medium is called
a. activation
b. enameling
c. corrosion
d. coating
Answer- corrosion
Que- When an active metal like Al comes in contact with less active element like Cu then it produces
a. dry cell
b. galvanic cell
c. electrolytic cell
d. a and b
Answer- galvanic cell
Que- Which of the following is typical transition metal?
a. Sc
b. Y
c. Cd
d. Co
Answer- Co
Que- Isotopes differs in
a. arrangement of electrons in orbitals
b. position in the periodic table
c. properties depend upon mass
d. chemical properties
Answer- chemical properties
Que- The mass of one mole of electron is
a. 008
b. 55
c. 184
d. 637
Answer- 55
Que- The volume occupied by 1.4g CO at S.T.P is
a. 4 dm3
b. 24 dm3
c. 12 cm3
d. 12 dm3
Answer- 12 dm3
Que- The number of atoms in a molecule determines
a. macromolecule
b. macromolecule
c. molecularity
d. atomicity
Answer- atomicity
Que- Which of the following set has all species isoelectronic
a. F - Cl - Br
b. Li+1 - Na+1 - K+1
c. F - Ne - Na+
d. H+ - H- - H
Answer- F - Ne - Na+
Que- Which element has same isotopes like palladium
a. Nickel
b. Calcium
c. Cadmium
d. Tin
Answer- Calcium
Que- Water absorber used in combustion analysis is
a. 50% KOH
b. Lime water
c. CaCl2
d. Mg (CIO4)2
Answer- Mg (CIO4)2
Que- A limiting reactant is one which
a. is taken in lesser quantity in grams as compared to other reactants
b. is taken in lesser quantity in volume as compared to other reactants
c. gives the maximum amount of the product which is required
d. gives the minimum amount of the product under consideration
Answer- gives the minimum amount of the product under consideration
Que- The type of filtering media used for filtration depending upon
a. Nature of reactants
b. Nature of crucible
c. Nature of product
d. Nature of precipitate
Answer- Nature of precipitate
Que- A safe and more reliable method for drying the crystal is
a. Hot air currents
b. folds of filter paper
c. oven
d. Vacuum desiccator
Answer- Vacuum desiccator
Que- A method of separation of components from its solution using Distribution law is
a. Sublimation
b. Crystallisation
c. Solvent extraction
d. Distillation
Answer- Solvent extraction
Que- A real gas obeying vander waals equation will resemble the ideal gas if
a. Both a and b are small
b. Both a and b are large
c. a is small and b is large
d. a is large and b is small
Answer- Both a and b are small
Que- Plasma is used in
a. Fluorescent bulb
b. Neon signs
c. Lasers
d. All of these
Answer- All of these
Que- The molecules of CO2 in dry ice form
a. Ionic crystal
b. Covalent crystal
c. Molecular crystal
d. Any type of crystal
Answer- Molecular crystal
Que- Which of the following is pseudo solid
a. CaF2
b. NaCl
c. Glass
d. Diamond
Answer- Glass
Que- Only London dispersion forces are present among the
a. Molecules of water in liquid state
b. Atoms of helium in gaseous state at high temperature
c. Molecules of hydrogen chloride gas
d. Molecules of solid iodine
Answer- Molecules of solid iodine
Que- Bohrs model is contradicted by
a. Plancks theory
b. Dual nature of matter
c. Heisenbergs uncertainty principle
d. All of these
Answer- Heisenbergs uncertainty principle
Que- Quantum number values for 3p orbitals are
a. n=3 l=2
b. n=3 l=0
c. n=3 l=1
d. n=3 l=3
Answer- n=3 l=1
Que- Which specie has unpaired electrons in antibonding molecular orbitals
a. O2+2
b. N2-2
c. B2
d. O2-2
Answer- N2-2
Que- Atomic radius can be determined by
a. X - ray diffraction
b. Spectrophotometer
c. Optical microscope
d. Electron microscope
Answer- X - ray diffraction
Que- For a given process the heat changes at constant pressure (qp) and at constant volume (qv) are related to each other as
a. qp = qv
b. qp < qv
c. qp > qv
d. qp = qv / 2
Answer- qp > qv
Que- For which system does the equilibrium constant Kc has unit of (concentration)-1
a. N2+3H2 <=>2NH3
b. H2+I2 <=>2HI
c. 2NO2 <=> N2H4
d. PCI5 <=> PCI3+CI2
Answer- 2NO2 <=> N2H4
Que- Solubility product of AgCl is 2.0 x 10-10 mol2 dm-6. Maximum Concentration of Ag+1 ions in the solution is
a. 0 x 10-10 mol dm-3
b. 414 x 10-5 mol dm-3
c. 0 x 10-10 mol dm-3
d. 0 x 10-5 mol dm-3
Answer- 414 x 10-5 mol dm-3
Que- Which of the following solution has the highest boiling point?
a. 85% NaCl Solution
b. 0 % glucose solution
c. 0 % urea solution
d. All have same boiling point
Answer- 85% NaCl Solution
Que- Stronger is the oxidizing agent greater is the
a. Oxidation potential
b. Redox potential
c. e.m.f of cell
d. standard reduction potential
Answer- standard reduction potential
Que- Which of the following can be used in laptops?
a. Silver oxide battery
b. Fuel cell
c. Nickel cadmium cell
d. Lead accumulator
Answer- Nickel cadmium cell