chemistry Mcqs
851. Which of the following aldehydes shows rapid reaction with sodium nitroprusside ?
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A. acetone

B. accetaldehyde

C. formaldehyde

D. benzaldehyde

852. Which of the following will give phosphoric acid one reaction with water_________________?
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A. P2O5

B. PCI5

C. P2O3

D. All of the above
853. Which one of the following substances conducts electricity by the movement of ions ?
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A. Graphite

B. Molten sodium chloride

C. Copper

D. Mercury

854. Which discovery caused a revision in the periodic law as stated by Mendeleev ?
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A. Location of nucleus by Rutherford

B. Natural radioactivity by Henry Bacquerel.

C. X-rays by Roentgen

D. Atomic number by Moseley
855. Which of the following do not give aldol condensation reactions ?
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A. propionaldehyde

B. diemthyl ketone

C. formaldehyde

D. acetaldehyde

856. Which one of the following gives white precipitate with aqueous solution of BaCl2?
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A. Na2CO3

B. Na2CrO4

C. NaNO3

D. NaHCO3

857. Which of the following will not form crystalline structure with opporitely charged ions_________________?
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A. Mg2+

B. Ca2+

C. H+

D. H-

858. Essential amino acids are___________________?
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A. 15

B. 10

C. 5

D. 20

859. NaOH is named as caustic soda because________________?
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A. It corrodes the organic tissues

B. It reacts with fats to form soap

C. It reacts with chlorine gas

D. It is used in soda water

860. Which of the following always increases on going from top to bottom in a group ?
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A. Tendency to get reduced

B. Oxidizing power

C. Metallic character

D. Electronegativity

861. For determining the order of reaction we use__________________?
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A. Refractometric method

B. Dilatometric method

C. Optical activity method

D. Half life method
862. Allotropic form of phosphorus that is poisonous is___________________?
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A. White

B. Black

C. Red

D. Violet

863. The element cesium bears resemblance with________________?
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A. Ca

B. Cr

C. Both of the above

D. None of the above
864. The longest period in the modern periodic table is___________________?
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A. 6th

B. 7th

C. 5th

D. 2nd and 3rd both

865. The complete reduction carboxylic acid results in the formation of________________?
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A. Alcohol

B. Alkyne

C. Alkane

D. Alkene

866. Compounds of nitrogen and phosphorus are mostly________________?
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A. ionic

B. polar

C. all varieties are possible

D. covalent
867. Deuterium reacts with oxygen to form________________?
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A. Water gas

B. Hard water

C. Heavy water

D. Soft water

868. A catalyst can not effect__________________?
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A. Products

B. Chemical equilibrium

C. Reactants

D. both A & B
869. The gas which cannot be dried by conc. H2SO4 ?
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A. SO2

B. H2S

C. CO2

D. C2H4

870. Which one of the following is not an alkali metal ?
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A. Caesium

B. Rubidium

C. Radium

D. Francium

871. Higher value of electron affinity means__________________?
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A. Atom may form di-positive ion

B. Atom will lose electron easily

C. The reason is unknown

D. Atom will gain electron easily
872. Which one is least ionic in nature and decompose on heating ?
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A. NaOH

B. KOH

C. CsOH

D. LiOH
873. Metallic characters of alkali metals_____________________?
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A. No regular trend

B. Decrease down the group

C. Remain same

D. Increase down the group
874. Ncleophilic addition reactions are catalysed__________________?
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A. Acid

B. Base

C. Both A and B

D. None

875. Which of the following reaction is not shown by ketones ?
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A. reaction with 2 4 dinitrophenyl hydrazine

B. reaction with NaHSO3

C. reaction with Fehling solution

D. reaction with HCN

876. Nitronium ion is___________________?
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A. NO2-

B. NO

C. NO3

D. NO2+
877. Formula of haloform is_________________?
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A. CX4

B. CHX3

C. CH3X

D. HCOX

878. Substance which is found in dried up lakes of Tibet and California is_______________?
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A. Colemanite

B. Calcium carbonate

C. Boric acid

D. Tincal
879. Which of the following reaction is not shown by ketones ?
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A. reaction with Fehling solution

B. reaction with HCN

C. reaction with NaHSO3

D. reaction with 2 4 dinitrophenyl hydrazine

880. How many electrons are there in benzene to form delocalized electron cloud________________?
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A. 6

B. 3

C. 4

D. 8

881. Shielding effect across the period_________________?
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A. Decreases

B. Increases

C. Can not be predicted

D. Remains constant
882. Which of the following is not a fatty acid ?
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A. Phthalic acid

B. Propanoic acid

C. Acetic acid

D. Butanoic acid

883. Phosphoric acid is a weak acid and its basicity is____________________?
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A. 3

B. 2

C. zero

D. 1

884. Which of the following is not an amino acids_____________________?
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A. glumatic acid

B. aspartic acids

C. glycine

D. lactic acid
885. An element has electronic conviguration 1s2 2s2 2p2. It belongs to__________________?
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A. Group IV-A

B. Group VI-A

C. Group VII-A

D. Group II-A

886. Which of the following has orange flavour__________________?
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A. isobutyl formate

B. ethyl butyrate

C. amyl lactate

D. octyl acetate
887. Which of the following shows inert pair effect ?
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A. tin

B. boron

C. carbon

D. silicon

888. Seventh period contains _________________ normal elements ?
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A. 4

B. 8

C. 6

D. 2
889. The hydrolysis of Benzenetrizonide will yield three moles of____________________?
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A. Benzaldehyde

B. Glyoxal

C. Glycol

D. Glyoxime

890. Ethanal is prepared industrially by air oxidation of ethylene using palladium chloride as catalyst and _________ as promoter?
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A. PdCl2

B. CuCl2

C. Cu2Cl2

D. PbCl2

891. Keeping in view the size of atom which order is correct one ?
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A. Ba > Mg

B. C1 > I

C. Mg > Sr

D. Lu > Ce

892. Energy required to form transition state is called _________________?
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A. V

B. Ea

C. K.E

D. P.E

893. Formaldehyde condenses with phenol in the presence of dilute H2SO4 to yield________________?
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A. urotropine

B. Bakelite

C. Nylon 66

D. Aniline formaldehyde plastic

894. Which one of the following methods will not give benzene ?
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A. Hydrolysis of benzene sulphonic acid with super heated steam

B. Chlorobenzene with NaOH at 360C & 150atm.

C. Distilling phenol with Zn dust

D. Heating sod. Salt of Benzoic acid with soda lime

895. Which is fused cyclic aromatic compound _____________________?
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A. biphenyl

B. naphthalene

C. diphenyl methane

D. diphenyl amine

896. What is the molecular formula of Benzenetriozonide ?
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A. C6H6O9

B. C6H5O9

C. C6H6O6

D. C6H5O8

897. The chemical composition of cinnabar is__________________?
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A. FeS

B. PbS

C. ZnS

D. HgS
898. Which of the following ion is stable in aqueous solution ?
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A. All are stable

B. H+

C. H-

D. Cl-
899. Aldehyde and ketone have same general formula for homologous series_________________?
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A. CnH2nO

B. CnH2nOn+1

C. CnH2nO2n

D. CnH2n

900. Downs cell is used to prepare_________________?
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A. Sodium metal

B. Sodium hydroxide

C. Sodium bicarbonate

D. Sodium carbonate