Que- Li is different from its family members due to____________________?
a. small size
b. high charge density
c. less electropositivity
d. all of the above
Answer- all of the above
Que- Carbonates of lithium are not stable like that of sodium due to________________?
a. Low electronegativity
b. Low electropositivity
c. Low charge density
d. Not known yet
Answer- Low electropositivity
Que- Which one of the following is not an alkali metal ?
a. Francium
b. Caesium
c. Rubidium
d. Radium
Answer- Radium
Que- The element cesium bears resemblance with________________?
a. Ca
b. Cr
c. Both of the above
d. None of the above
Answer- None of the above
Que- Downs cell is used to prepare_________________?
a. Sodium carbonate
b. Sodium bicarbonate
c. Sodium metal
d. Sodium hydroxide
Answer- Sodium metal
Que- Ammonia may be prepared by heating ammonium chloride with_______________?
a. Water
b. NaCl
c. Aqueous sodium hydroxide
d. H2SO4
Answer- Aqueous sodium hydroxide
Que- Crystals of Na2CO3. 10H2O when exposed to air_________________?
a. Lose water and remain solid
b. Gain water and remain solid
c. Gain water and become liquid
d. Remains unchanged
Answer- Lose water and remain solid
Que- Which one of the following gives white precipitate with aqueous solution of BaCl2?
a. NaHCO3
b. NaNO3
c. Na2CO3
d. Na2CrO4
Answer- Na2CO3
Que- The deliquescence is a property in which a solid____________________?
a. Absorbs moisture and remains solid
b. Absorbs moisture and turns to liquid form
c. Loses water of crystallization
d. Increases the number of water of crystallization
Answer- Absorbs moisture and turns to liquid form
Que- In diaphragm cell level of brine in anode compartment is kept slightly higher which prevents_______________?
a. Hydroxide ions to reach anode
b. Chlorine gas to mix
c. Cathode to decay
d. All of the above
Answer- Hydroxide ions to reach anode
Que- Alkali and alkaline earth metals impart colours when heated over burner. It is due to______________?
a. Smaller electronegativity of alkali metals
b. Smaller ionic radius of these metals
c. De-excitation of electrons from higher energy levels to low energy level
d. Excitation of electrons from low energy levels to higher energy levels
Answer- De-excitation of electrons from higher energy levels to low energy level
Que- First ionization potential of alkaline earth metal is greater than alkali metals because___________________?
a. They are more reactive
b. They have greater atomic radii
c. They have smaller atomic sizes
d. All
Answer- They have smaller atomic sizes
Que- NaOH is named as caustic soda because________________?
a. It corrodes the organic tissues
b. It is used in soda water
c. It reacts with chlorine gas
d. It reacts with fats to form soap
Answer- It corrodes the organic tissues
Que- Carnalite has chemical formula__________________?
a. KCI
b. KCI.MgCl2.6H2O
c. Na2B4O7.10H2O
d. CaCO3.MgCO3
Answer- KCI.MgCl2.6H2O
Que- Electrolysis of dilute solution of NaCl results at the anode_______________?
a. sodium
b. hydrogen
c. chlorine
d. oxygen
Answer- oxygen
Que- Which ion will have maximum value of heat of hydration ?
a. A1+3
b. Cs+
c. Ba+
d. Mg+2
Answer- A1+3
Que- Which one is natron ?
a. Na2CO3
b. Na2CO3.10H2O
c. Na2CO3.H2O
d. NaHCO3
Answer- Na2CO3.H2O
Que- Which one is least ionic in nature and decompose on heating ?
a. LiOH
b. NaOH
c. KOH
d. CsOH
Answer- LiOH
Que- The word Alkali means__________________?
a. Base
b. Basic salt
c. Ashes
d. Spirit
Answer- Ashes
Que- Which element is necessary for normal leaf development ?
a. Si
b. Ba
c. Mg
d. Ca
Answer- Ca
Que- Nitrates of which pair of elements give different products on thermal decomposition ?
a. Na K
b. Mg Ca
c. Li Na
d. Li Ca
Answer- Li Na
Que- Which of the following sulphates is not soluble in water ?
a. Sodium sulphate
b. Potassium sulphate
c. Zinc sulphate
d. Barium sulphate
Answer- Barium sulphate
Que- The ore CaSO4.H2O has the general name_______________?
a. Gypsum
b. Dolomite
c. Calcite
d. Plaster of Paris
Answer- Gypsum
Que- Which one of the following substances conducts electricity by the movement of ions ?
a. Graphite
b. Copper
c. Molten sodium chloride
d. Mercury
Answer- Molten sodium chloride
Que- Which one of the following carbonate is water insoluble ?
a. Na2CO3
b. K2CO3
c. (NH4)2CO3
d. CaCO3
Answer- CaCO3
Que- In diaphragm cell hydrogen is discharged by the reduction of__________________?
a. Water
b. HCI
c. Na+
d. NaCl
Answer- Water
Que- Gypsum is applied to the soil as a source of________________?
a. Ca and P
b. S and P
c. Ca and S
d. we could not apply
Answer- Ca and S
Que- Which one of the following alkali metals forms only normal oxide when it reacts with O2 ?
a. Lithium
b. Sodium
c. Potassium
d. Rubidium
Answer- Lithium
Que- Which one of the following pairs shown diagonal relationship in the periodic table ?
a. Sodium and Lithium
b. Lithium and magnesium
c. Lithium and beryllium
d. Boron and Beryllium
Answer- Lithium and magnesium
Que- Sodium is not observed in +2 oxidation state because of its__________________?
a. high first ionization potential
b. high second ioniation potential
c. high ionic radius
d. high electronegativity
Answer- high second ioniation potential
Que- Magnesium metal does not burn in the vessel containing_______________?
a. N2
b. O2
c. N2 and O2
d. Ne
Answer- Ne
Que- Second ionization potential of alkali metals are very high due to_______________?
a. being s-block elements
b. inert gas configurations
c. ns1 electronic configuration
d. being metals
Answer- inert gas configurations
Que- Which one can form complex ?
a. Na
b. Cr
c. Li
d. K
Answer- Li
Que- During sulphonation of benzene H2SO4 generates the electrophile _________________?
a. HSO4-
b. SO2
c. SO3
d. H+
Answer- SO3
Que- Which compound will readily undergo sulphonation ?
a. Benzene
b. Nitro benzene
c. Toluene
d. Chlorobenzene
Answer- Toluene
Que- Which one of the following statement is not correct about benzene ?
a. On hydrogenation 208 KJ/mole is liberated
b. C-H bond length in benzene is 1.09 A?
c. Molecular mass of benzene is 78.108
d. Resonance energy of benzene is 150.5 K Cal/mole
Answer- Resonance energy of benzene is 150.5 K Cal/mole
Que- Replacement of hydrogen of benzene by alkyl group in the presence of alkyl halide & aluminum chloride is known as__________________?
a. Dows process
b. Friedel & Craft acylation
c. Friedel & Craft alkylation
d. Clemmenson reduction
Answer- Friedel & Craft alkylation
Que- Which compound form benzoic acid on oxidation with acidified KMnO4 or K2Cr2O7 ?
a. Toluene
b. Ethyl benzene
c. n-propyl benzene
d. All
Answer- All
Que- What is the molecular formula of Benzenetriozonide ?
a. C6H6O9
b. C6H5O8
c. C6H5O9
d. C6H6O6
Answer- C6H6O9
Que- The hydrolysis of Benzenetrizonide will yield three moles of____________________?
a. Glyoxime
b. Benzaldehyde
c. Glycol
d. Glyoxal
Answer- Glyoxal
Que- In benzene sulphonic acid the sulphonic group is attached with benzene ring through ___________________?
a. Hydrogen
b. Oxygen
c. Sulphur
d. OH
Answer- Sulphur
Que- Aniline is a derivative of benzene which contains__________________?
a. Imino group
b. Amino group
c. Amide group
d. Nitro group
Answer- Amino group
Que- Nitration of chlorobenzene gives___________________?
a. o – chloronitrobenzene
b. p – chloronitrobenzene
c. m – chloronitrobenzene
d. A & B
Answer- A & B
Que- By which method the molecular mass of benzene was determined as 78.108 ?
a. Specific gravity method
b. Vapour density method
c. X-ray diffraction method
d. Distillation methos
Answer- Vapour density method
Que- Chlorination of toluene in the presence of sublight produces_________________?
a. Benzyl chloride
b. o – chlorotoluene
c. p – chlorotoluene
d. benzoic acid
Answer- Benzyl chloride
Que- Mixture of catalysts Cr2O3 + A?2O3 + SiO2 at 500?C are used when benzene is prepared from_______________?
a. acetylene
b. N-hexane
c. Benzene sulphonic acid
d. Sodium benzoate
Answer- N-hexane
Que- Which is fused cyclic aromatic compound _____________________?
a. diphenyl amine
b. diphenyl methane
c. naphthalene
d. biphenyl
Answer- naphthalene
Que- Acetophenone is a_____________________?
a. Ether
b. Ketone
c. Aldehyde
d. Ester
Answer- Ketone
Que- Benzene does not undergo___________________?
a. Substitution reaction
b. Addition reaction
c. Polymerization reactions
d. Oxidation reactions
Answer- Polymerization reactions
Que- Nitronium ion is___________________?
a. NO3
b. NO
c. NO2-
d. NO2+
Answer- NO2+
Que- Benzene is heated in air with V2O5 at 450°C it undergoes________________?
a. Substitution reaction
b. Addition reaction
c. Elimination reaction
d. Oxidation reaction
Answer- Oxidation reaction
Que- The preparation of benzene from acetylene can also be said as_________________?
a. Oxidation
b. Polymerization
c. Dehydration
d. Condensation
Answer- Polymerization
Que- Ozonolysis of benzene produces___________________?
a. Glycol
b. Glyoxal
c. Vicinal diol
d. Both B & C
Answer- Glyoxal
Que- Boron is non-netal whereas A1 is metal. It is due to_______________________?
a. Small size
b. High nuclear charge
c. Both A and B
d. No authorized justification yet
Answer- Both A and B
Que- One of the outstanding features of boron is its ability to form__________________?
a. Molecular addition compounds
b. Molecular crystals
c. Semiconductors
d. Ionic compounds
Answer- Molecular addition compounds
Que- Borax is a white crystalline solid and it is_________________?
a. More soluble in cold water
b. More soluble in hot water
c. Insoluble in water
d. Soluble only in organic solvents
Answer- More soluble in hot water
Que- Special features of borate glass is that it is_________________?
a. Heat resistant
b. Low melting
c. Used to prepare chemical garden
d. Green in colour
Answer- Heat resistant
Que- Aluminium oxide is_________________?
a. Acidic oxide
b. Basic oxide
c. Amphoteric oxide
d. It does not exists
Answer- Amphoteric oxide
Que- Which electronic configuration corresponds to an element of group IIIA ?
a. 1s2 2s2 2p3
b. 1s2 2s2 2p6 3s2 3p1
c. 1s2 2s2 2p4
d. 1s2 2s2 2p6 3s2 3p6 4s2 3d1
Answer- 1s2 2s2 2p6 3s2 3p1
Que- In network of silica (SiO2) each silicon atom is surrounded by _____________ atoms of osygen?
a. 4
b. 2
c. 1
d. 6
Answer- 4
Que- Orthoboric acid is 2.6% soluble in water at 40?C and ___________at 107°C.
a. 26%
b. 27%
c. 37%
d. <2.6%
Answer- 37%
Que- Because of its ability to combine with both oxygen and nitrogen aluminium metal is used_____________?
a. As nitrometer
b. To remove air bubbles from molten metal
c. To produce alloy
d. As insulator
Answer- To remove air bubbles from molten metal
Que- Silicon differ from silica by a group of__________________?
a. Ch3
b. OH
c. OCH3
d. O2
Answer- Ch3
Que- Boron is non metal while other elements of IIIA group are metals. This is because______________?
a. it has small size
b. it has high nuclear charge
c. it forms molecular addition compounds
d. all of the above
Answer- all of the above
Que- The coloured glassy mass in borax bead test is due to the formation of___________________?
a. metal borate
b. metal meta borate
c. metal boride
d. metal silicate
Answer- metal meta borate
Que- If temperature of gallium arsenide is increased then its conductivity will___________________?
a. decrease
b. increase
c. remains constant
d. first decreases then increases
Answer- increase
Que- Which of the following will decompose to produce litharge_________________?
a. Pb2O
b. Pb3O4
c. PbO2
d. All of the above
Answer- Pb3O4
Que- Which of the following is metasilicic acid ?
a. H2SnO3
b. H2SiO3
c. H3AsO4
d. H3SbO4
Answer- H2SiO3
Que- Boron in soil has been considered micronutrient for_________________?
a. Soil porocity
b. Proper growth of plants
c. Alkalinity of soil
d. All
Answer- Proper growth of plants
Que- Substance which is found in dried up lakes of Tibet and California is_______________?
a. Tincal
b. Boric acid
c. Calcium carbonate
d. Colemanite
Answer- Tincal
Que- Which of the following does not give Borax bead test ?
a. Cu
b. Cr
c. Ni
d. A1
Answer- A1
Que- The metal which is used in thermite process because of its activity is____________________?
a. iron
b. copper
c. aluminium
d. zinc
Answer- aluminium
Que- Which of the following shows inert pair effect ?
a. boron
b. carbon
c. silicon
d. tin
Answer- tin
Que- Tincal is a mineral of___________________?
a. A1
b. Si
c. B
d. C
Answer- B
Que- Which one of the following is not a semiconductor ?
a. Si
b. Ge
c. Se
d. Sn
Answer- Sn
Que- The process of aluminium extraction is called__________________?
a. Hall process
b. Thermite process
c. Haber process
d. Contact process
Answer- Hall process
Que- Aqueous solution of borax above 62°C gives crystals of________________?
a. Na2B4O7.4H2O
b. Na2B4O7.5H2O
c. Na2B4O7.2H2O
d. Na2B4O7.10H2O
Answer- Na2B4O7.5H2O
Que- Which of the following is not a use of silicon ?
a. Lubricants
b. Hydraulic brakes
c. Antifreeze
d. Water repellent
Answer- Antifreeze
Que- CO2 is gas while SiO2 is solid at room temperature?
a. carbon is non-metal while silicon is semi-metal
b. CO2 is an independent molecule while SiO2 has network covalent structure
c. CO2 forms multiple bond while silicon does not form multiple bonds
d. Silicon has all sigma bonds
Answer- CO2 is an independent molecule while SiO2 has network covalent structure
Que- Identify the correct statement regarding CO_______________?
a. it combines with H2O to form carbonic acid
b. it reacts with red blood cells of haemoglobin
c. it is powerful oxidizing agent
d. it is used to prepare aerated drinks
Answer- it reacts with red blood cells of haemoglobin
Que- Boric acid cannot be used__________________?
a. As antiseptic in medicine
b. For washing eyes
c. In soda bottles
d. For enamel and glazes
Answer- In soda bottles
Que- Which element can form tripositive ion ?
a. Beryllium
b. Carbon
c. Silicon
d. Aluminium
Answer- Aluminium
Que- Which of the following is different with respect to physical appearance ?
a. Arsenic
b. Phosphorus
c. Antimony
d. Bismuth
Answer- Phosphorus
Que- Compounds of nitrogen and phosphorus are mostly________________?
a. ionic
b. covalent
c. polar
d. all varieties are possible
Answer- covalent
Que- SO3 is not absorbed in water directly because__________________?
a. Reaction is exothermic
b. It is insoluble in water
c. Dilute acid is produced
d. All of above
Answer- Reaction is exothermic
Que- Which of the following will give phosphoric acid one reaction with water_________________?
a. PCI5
b. P2O3
c. P2O5
d. All of the above
Answer- All of the above
Que- Phosphorus is a Greek word and it means_________________?
a. Light bearing
b. Fire
c. Impure
d. Tetrahedral
Answer- Light bearing
Que- Allotropic form of phosphorus that is poisonous is___________________?
a. White
b. Red
c. Black
d. Violet
Answer- White
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- Phosphorous acid upon thermal decomposition yields phosphoric acid and____________________?
a. Phosphine
b. Phosphorus
c. Water
d. Phosphorus pentoxide
Answer- Phosphine
Que- P2O5 is a hygroscopic powder which sublimes at______________?
a. 260°C
b. 360°C
c. 630°C
d. 620°C
Answer- 360°C
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 chemical composition of cinnabar is__________________?
a. ZnS
b. PbS
c. HgS
d. FeS
Answer- HgS
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- Arsenic oxides are removed by passing through_________________?
a. Ferric hydroxide
b. Sodium hydroxide
c. Calcium hydroxide
d. Aluminium hydroxide
Answer- Ferric hydroxide
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- Which one of the followings possesses melting point below 0°C?
a. Nitrogen
b. Phosphorus
c. Carbon
d. Bismuth
Answer- Nitrogen
Que- The most electronegative element among the following is_________________?
a. Sb
b. N
c. As
d. P
Answer- N