chemistry Mcqs
701. Which order of reaction obeys the relation t1/2 = 1/Ka____________________?
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A. Third order

B. Second order

C. First order

D. Zero order

704. Boron is non metal while other elements of IIIA group are metals. This is because______________?
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A. it has small size

B. it forms molecular addition compounds

C. all of the above

D. it has high nuclear charge

706. Ozonolysis of benzene produces___________________?
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A. Glycol

B. Glyoxal

C. Vicinal diol

D. Both B & C

707. Second ionization potential of alkali metals are very high due to_______________?
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A. being metals

B. ns1 electronic configuration

C. being s-block elements

D. inert gas configurations
708. Greater the conc. Of reactant__________________?
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A. any of above

B. Lesser will be dx/dt

C. dx/dt will be moderate

D. Greater will be dx/dt
709. Picric acid is_________________?
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A. dicarboxylic acid

B. monocarboxylc acid

C. aromatic carboxylic acid

D. none of these
710. In the formation of Zwitter ions proton goes from____________________?
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A. Amino to carboxyl group

B. Carboxyl to amino group

C. Carboxyl group only

D. Amino group only

711. Aqueous solution of borax above 62C gives crystals of________________?
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A. Na2B4O7.2H2O

B. Na2B4O7.5H2O

C. Na2B4O7.4H2O

D. Na2B4O7.10H2O

712. Which one is natron ?
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A. Na2CO3

B. NaHCO3

C. Na2CO3.H2O

D. Na2CO3.10H2O

713. Which of the following is the strongest acid ?
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A. Propanoic acid

B. Formic acid

C. Water

D. Acetic acid

714. Halides in which halogen atoms act as a bridge between two atoms of the other element are called___________________?
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A. Covalent halides

B. Polymeric hydrides

C. Polymeric halides

D. Electronegative halides

716. Sum of exponents of molar concentration is called___________________?
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A. Order of reaction

B. Rate of reaction

C. Average of reaction

D. Molecularity

717. Phosphorus is a Greek word and it means_________________?
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A. Tetrahedral

B. Fire

C. Light bearing

D. Impure

719. Which one of the following pairs shown diagonal relationship in the periodic table ?
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A. Sodium and Lithium

B. Lithium and magnesium

C. Lithium and beryllium

D. Boron and Beryllium

720. The coloured glassy mass in borax bead test is due to the formation of___________________?
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A. metal silicate

B. metal borate

C. metal meta borate

D. metal boride

721. Acetophenone is a_____________________?
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A. Aldehyde

B. Ketone

C. Ether

D. Ester

723. All the elements in group VIA are ___________________ in nature?
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A. metals

B. all of above

C. polymeric

D. hygroscopic

727. The organic acid that can be made from ethanol is_________________?
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A. Formic acid

B. Acetic acid

C. Butanoic acid

D. Citric acid

728. Acetone reacts with HCN to form a cyanohydrin. It is an example of________________?
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A. electronphilic addition

B. nucleophilic addition

C. electrophilic substitution

D. nucleophilic substitution

730. Which of the following is not a use of acetaldehyde ?
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A. formation of phenolic resins

B. formation of mirror

C. formation of throat lozenges

D. antiseptic inhalant

731. Cannizzaros reaction is not given by__________________?
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A. benzaldehyde

B. trimethyl acetaldehyde

C. acetaldehyde

D. formaldehyde

732. The common name of propane 1 3-dioic is_________________?
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A. Fumaric acid

B. Oxalic acid

C. Aromatic acid

D. Malonic acid
733. Boron in soil has been considered micronutrient for_________________?
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A. Alkalinity of soil

B. Proper growth of plants

C. All

D. Soil porocity

734. Oxygen and sulphur resemble in all except________________?
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A. Show same oxidation state

B. Polymeric

C. Electronic conviguration of valence shell electrons

D. Show allotropy

735. Addition of 2nd electron to a uni negative ion is always____________________?
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A. Endothermic

B. Exothermic

C. Unpredictable

D. Data is insufficient

737. Glycine is the name of an amino acid because___________________?
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A. Shining appearance

B. Bitter taste

C. Sweet taste

D. Green colour

740. Aniline is a derivative of benzene which contains__________________?
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A. Nitro group

B. Amide group

C. Amino group

D. Imino group

741. Which of the following is not an ester_________________?
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A. sodium butyrate

B. amyl acetate

C. isobutyle formate

D. octyl acetate

742. Benzene does not undergo___________________?
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A. Substitution reaction

B. Oxidation reactions

C. Polymerization reactions

D. Addition reaction

743. The oxides of beryllium BeO is_______________?
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A. Acidic

B. Neutral

C. Amphoteric

D. Basic

744. In diaphragm cell level of brine in anode compartment is kept slightly higher which prevents_______________?
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A. Cathode to decay

B. Hydroxide ions to reach anode

C. All of the above

D. Chlorine gas to mix

745. The aliphatic monocarboxylic acids are obtained by the hydrolysis of________________?
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A. all above

B. fats and oils

C. proteins and oild

D. fats and proteins

748. Which of the following is not a use of silicon ?
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A. Antifreeze

B. Water repellent

C. Lubricants

D. Hydraulic brakes

750. Which of the following is metasilicic acid ?
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A. H3SbO4

B. H3AsO4

C. H2SiO3

D. H2SnO3