Chemistry Mcqs – (Science) MCQs Latest For FPSC, PPSC, NTS, KPPSC, SPSC & Other Tests
“ Chemistry Mcqs “. Tab this page to check “Latest Chemistry MCQs” for the preparation of competitive mcqs, FPSC mcqs, PPSC mcqs, SPSC mcqs, KPPSC mcqs, AJKPSC mcqs, BPSC mcqs, NTS mcqs, PTS mcqs, OTS mcqs, Atomic Energy mcqs, Pak Army mcqs, Pak Navy mcqs, CTS mcqs, ETEA mcqs and others. The most occurred mcqs of Chemistry in past papers. Past papers of Chemistry mcqs. Past papers of Chemistry MCQs. Chemistry Mcqs are the necessary part of any competitive / job related exams. The Chemistry mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Chemistry mcqs. The Important series of Chemistry Mcqs are given below:
Which of the following shows inert pair effect ?
Tincal is a mineral of___________________?
Which one of the following is not a semiconductor ?
The process of aluminium extraction is called__________________?
A. Hall process
B. Haber process
C. Thermite process
D. Contact process
Aqueous solution of borax above 62°C gives crystals of________________?
Which of the following is not a use of silicon ?
A. Hydraulic brakes
D. Water repellent
CO2 is gas while SiO2 is solid at room temperature?
A. Silicon has all sigma bonds
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. carbon is non-metal while silicon is semi-metal
Identify the correct statement regarding CO_______________?
A. it is powerful oxidizing agent
B. it reacts with red blood cells of haemoglobin
C. it combines with H2O to form carbonic acid
D. it is used to prepare aerated drinks
Boric acid cannot be used__________________?
A. For washing eyes
B. As antiseptic in medicine
C. In soda bottles
D. For enamel and glazes
Which element can form tripositive ion ?
Which of the following is different with respect to physical appearance ?
Compounds of nitrogen and phosphorus are mostly________________?
D. all varieties are possible
SO3 is not absorbed in water directly because__________________?
A. Reaction is exothermic
B. Dilute acid is produced
C. It is insoluble in water
D. All of above
Which of the following will give phosphoric acid one reaction with water_________________?
D. All of the above
Phosphorus is a Greek word and it means_________________?
A. Light bearing
Allotropic form of phosphorus that is poisonous is___________________?
Acetic anhydride can be obtained by treating ethyl alcohol with___________________?
C. Both A and B
Phosphorous acid upon thermal decomposition yields phosphoric acid and____________________?
D. Phosphorus pentoxide
P2O5 is a hygroscopic powder which sublimes at______________?
Phosphoric acid is a weak acid and its basicity is____________________?
All the elements in group VIA are ___________________ in nature?
D. all of above
Which allotropic form of phosphorous is the most stable ?
The chemical composition of cinnabar is__________________?
Oxygen and sulphur resemble in all except________________?
A. Show allotropy
B. Electronic conviguration of valence shell electrons
D. Show same oxidation state
Arsenic oxides are removed by passing through_________________?
A. Ferric hydroxide
B. Calcium hydroxide
C. Sodium hydroxide
D. Aluminium hydroxide
When sulphuric acid is treated with ethanol sulphuric acid behaves like________________?
A. an oxidizing agent
B. a dehydrating agent
C. an acid
D. as sulphonating agent
Which one of the followings possesses melting point below 0°C?
The most electronegative element among the following is_________________?
Phosphene gas will be produced if phosphorous acid is subjected to___________________?
D. Both b & c
Which one of following is not a property of pure quartz ?
A. Coloured solid
D. All of above
Which of the following does not contain phosphorus ?
B. Yolk of egg
Which one of the following is not the use of graphite ?
C. Lead pencils
D. Electrode of electrolytic cell
The composition of brown ring in nitrate test is_________________?
Which one of the following compounds usually smells like garlic ?
D. All have same smell
The element of group VIA which is a non-metal is________________?
Which of the elements show passivity when treated with conc. HNO3?
D. All of the above
The gas which cannot be dried by conc. H2SO4 ?
FeSO4 forms brown ring with________________?
Oxygen does not react with all except_________________?
In which compound nitrogen has maximum oxidation state____________________?
Among the halogens the rare element is________________?
Vander Waals forces are stronger in_______________?
The most powerful oxidizing agent among the halogens is__________________?
The halogen which reacts spontaneously with gold (Au) to form Au+3 is ________________?
The halogen which reacts very slowly with halogen is________________?
The halogen having highest electron affinity is_____________________?
Bromine can be liberated from KBr solution by the action of _______________?
C. Iodine solution
Consider the following reaction- 2KCIO3 + H2C2O4 + H2SO4 ? K2SO4 + 2H2O + 2CO2 + Oxide Which oxide of chlorine is produced in the above reaction ?
Consider the following reaction- 3Cl2 + 6NaOH ? NaClO3 + 5NaCl + 3H2O This reaction is_______________?
A. Double displacement reaction
B. Displacement reaction
C. Disproportionation reaction
D. Reduction reaction
Which of the halogen can displace other three elements ?
The chemical formula of sodium hypochlorite is________________?
Bleaching powder is not used for bleaching________________?
B. Costly fabrics
D. Paper pulb
Which of the following is not use of compounds of Fluorine________________?
A. SbF3 is used for manufacture of pottery
B. Cu F2 is used in ceramic industry
C. Sodium fluoroacetate is a rat poison
D. None of the above
Photographic plates are coated with a thin film of _________________?
Indicate the correct statement__________________?
A. Br2 is more reactive than Cl2
B. I2 is a volatile solid
C. Cl2 is the strongest oxidizing agent
D. Cl2 is insoluble in water
Which one of the following halogens is present in Teflon________________?
Which is the paramagnetic oxide of chlorine ?
The colour of chlorine gas is_______________?
A. reddish brown
B. freenish yellow
C. pale yellow
D. grayish black
Which of the following statements is incorrect about fluorine_______________?
A. fluorine is restricted to -1 oxidation state
B. fluorine has lowest dissociation energy among the halogens
C. fluorine follows octet rule and as well as extended octet rule
D. both B and C
Which one of the following is the weakest acid in water__________________?
Which of the following represents the correct electronic configuration of VII A group elements in the ground state ?
Which is the strongest acid ?
Bleaching powder is an example of________________?
A. Double salt
B. Normal salt
C. Mixed salt
Which of the following oxides of iodine is used for quantitative analysis of CO ?
D. All are equally useful
Which of the halogen has highest electronegativity ?
Which of the following statements is incorrect about halogens ?
A. All the halogens have electronic conviguration ns2p5
B. All are non-metals
C. They have high electron attinity and ionization energy
D. All the halogens react with noble gases to form their halides
Fluorine can react with_________________?
D. All of the above
Which of the following is the weakest reducing agent ?
In which compound of Xenon the oxidation state of Xenon is + 6?
The anhydride of HCIO4 is_________________?
Alkanes containing a methyl group on main chain at 2nd carbon are called________________?
Alkanes are also known as________________?
A. unsaturated hydrocarbon
B. saturated hydrocarbon
D. both A & C
Hydrogenolysis results in the formation of________________?
Removal of CO2 is called_____________________?
Molozonide is unstable and changes into ozonide on_________________?
R-Mg-Br is called___________________?
A. Metallic alkyl halide
B. Grignard reagent
C. Both A & B
Which of the following is the most reactive_________________?
Introduction of nitro group in a molecule is called___________________?
The gas used in manufacturing of urea fertilizer__________________?
Which of the following will be acidic_____________?
D. all of the above
Alkenes are produced from dehalogenation of________________?
A. trihalo alkane
B. dihalo alkane
C. vicinal dihalo alkane
D. vicinal trihalo alkane
In unsaturated hydrocarbons electrons favour___________________?
A. substitution reactions
B. addition reactions
C. less reactivity
Which one is Chloroform_________________?
Which is used for artificial ripening of fruit ?
Preparation of vegetable ghee involves_________________?
Which is methyl cyanide_________________?
D. CH2 = CH – CN
When one hydrogen atom of alkane is removed then it is called________________?
D. saturated hydrocarbon
Sabatier Senderns reaction involve _____________ in presence of Ni?
A. Aalkene & H2
B. alkene & N2
C. alkene & O2
D. alkyne & Cl2
Clemmensens reduction infolves the reduction of___________________?
D. all of the above
Soda lime is a mixture of____________________?
A. NaOH and Na2O
B. CaO and NaOH
C. CaO and KOH
D. Na2O and KOH
Dehalogenation of ethyl tetrahalide will give____________________?
A. ethyl halide
D. all of the above are possible
Upto ___________________ C atoms alkanes are gases?
Incomplete oxidation of methane in the limited supply of air forms ?
A. CO + H2 + C
C. CO2 and H2O
D. CO + H2O + C
Order of ease of halogenation in alkane is________________?
General formula of alkyne is______________?
B. CnH2n – 2
C. CnH2n + 2
D. CnH2n + 2
Removal of halogen and hydrogen atom is_________________?
Reactivity due to pi-electrons is present in_________________?
D. both B & C
Raney nickel is prepared from ______________________ by treating with caustic soda?
A. Ni-Fe alloy
B. Ni-Cu alloy
C. Ni-Al alloy
D. Ni-Mg alloy
Vinylacetylene combines with HCI to form___________________?
D. divinyl acetylene
Which C-X bond has the highest bond energy per mole ?