Wednesday, August 22, 2018

GENERAL CHEMISTRY PRACTICE


1.which of the following method is neither meant for the synthesis nor for the separation of amines?
a)Hinsberg method                                                                   b)Hofmann method
c)Wurtz reaction                                                             d)Curtuis reaction

2.     Alizarin is used in
a)perfumery                                                                    b)pharmaceutical industry
c)dyeing                                                                         d)food industry

3.     Aspirin is the name of organic compound
a)hydroxyl benzoic acid                                                  b)acetyl salicylic acid
c)phenyl salicylate                                                           d)ethyl salicylate

4.     Which of the following is  polyamide?
a)Rayon                                                                          b)Nylon
c)Terylene                                                                      d)Orlon

5.     Which of the following is insecticide?
a)Bakelite                                                                       b)TNT
c)BHC                                                                            d)Aspirin

6.     How many moles of ammonia can be produced from 8 mole of hydrogen reacting with nitrogen?
a.2.33mole                                                                     b.3.33mole
c.4.33mole                                                                     d.5.33

7.     2gm of O2 at NTP has volume
a.1.4liter                                                                         b.2.8liter
c.8liter                                                                            d.11.2liter

8.     Isobar have the same number of
a.electrons                                                                      b.protons
c.neutrons                                                                       d.nucleous

9.     Which of the following is not amphoteric substance?
a.NH3                                                                             b.H2O

c.HCO3                                                                          d.HNO3

10.                        Which of the following shows hydrogen bonding?
a.P                                                                                  b.F2
c.O2                                                                                d.NH3

11.                        Which one of these is weakest?
a.ionic bond                                                                             b.covalent bond
c.metallic bond                                                               d.van der waal’s forces

12.                        Oxidation number of fe in K3[Fe(CN)6] is
a.+1                                                                                b.+2
c.+3                                                                                d.+4

13.                        In haemoglobin the iron is in
a.+2 oxidation state                                                        b.+1oxidation state
c.+3 oxidation state                                                        d.+4 oxidation state

14.                        The strongest reducing agent is
a.HNO2                                                                               b.H2S
c.H2SO3                                                                              d.SnCl2

15.                        Which of the following instrument is used for the measurement of atmospheric pressure
a.barometer                                                                     b.nanometer
c.jigameter                                                                      d.manometer

16.                        A real gas show ideal behavior at
a.low temperature and low pressure                               
b.low temperature and high pressure
c.high temperature and low pressure
d.high temperature and high pressure

17.                        A mixture of benzene and toluene forms
a.an ideal solution                                                           b.non-ideal solution
c.suspension                                                                             d.emulsion

18.                        The molarity of pure water is
a.1.16          mole                                                                     b.5.56mole
c.18.36mole                                                                             d.55.56mole

19.                        Which of the following is lewis acid
a.S                                                                                  b.:CH2
c.(CH3)3B                                                                       d.all of these

20.                        Phenolphthalein is not good indicator for titrating
a.NaOH against H2SO4                                                  b.NaOH against HCl
c.NaOH against oxalic acid                                    d.ferrous sulphate against KMNO4

21.                        All the element in the group of periodic table have the same
a.atomic number                                                             b.atomic weight
c.no.of valance electrons                                                 d.none of these

22.                        Which of the following has the smallest size
a.Na+                                                                                     b.Mg+2
c.Al+3                                                                             d.F

23.                        Most abundant element in the earth crust is
a.Hydrogen                                                                     b.oxygen
c.silicon                                                                          d.carbon

24.                        Sodium metal cannot be stored in
a.Benzene                                                                       b.Kerosone
c.Alcohol                                                                       d.Alcohol

25.                        Epsom salt is
a.MgSO4.7H2O                                                               b. MgSO4.5H2O
c. MgSO4.5H2O                                                              d. MgSO4.H2O

26.                        Which is not an ore of iron
a.haematite                                                                     b.magnetite
c.cassiterite                                                                     d.limonite

27.                        XeF2 is
a.linear                                                                           b.trigonal planar
c.pyramidal                                                                     d.square planar

28.                        Ammonium cyanate on heating gives
a.urea                                                                             b.Acetamide
c.Hydrazine                                                                    d.Formamide

29.                        Compound having same molecular formula but different properties is called
a.isotopes                                                                       b.isomers
c.isobars                                                                         d.Allotropes

30.                        The compound that doesn’t give a blue colour in lassaigne’s test is
a.Aniline                                                                        b.Glycine
c.Hydrazine                                                                    c.urea

31.                        Nitration of benzene is
a.nucleophilic substitution                                              b.nucelophilic addition
c.electrophilic substitution                                              c.free radical substitution

32.                        Which of the following yield both alkane and alkene
a.kolbe’s reaction                                                           b.willomosn’s synthesis
c.wurtz reaction                                                              d.sandmeyer reaction

33.                        Chloroform can be used in medicine as
a.Anaesthetic                                                                  b.Analgesic
c.Antipyretic                                                                   c.Antibiotic          



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