| 1 |
Carboxylic acid can be prepared from:
|
A. Hydrolysis of alkyl nitrites
B. Reaction of CO2with Gringard's reagent
C. Hydrolysis of esters
D. All of these
|
| 2 |
The derivatives that cannot be prepared directly from the acetie acid
|
A. Acetamide
B. Acetic anhydride
C. Ethyl acetate
D. Ester
|
| 3 |
Dipole-induced dipole forces are also called
|
A. dipole-dipole forces
B. ion-dipole forces
C. Debye forces
D. London-dispersion forces
|
| 4 |
At constant volume, for a fixed number of moles of a gas the pressure of the gas increases with size of temperature due to
|
A. increase in average molecular speed
B. increase in number of moles
C. increase in molecular attraction
D. decrease in the distance between the molecules
|
| 5 |
In an electrochemical series, elements are arranged on the basis of
|
A. pH scale
B. pKa scale
C. pOH scale
D. Hydrogen scale
|
| 6 |
Chloroethene, CH2 = CHC/ is the monomer of PVC. What are the C-C-C bond angles along the polymeric chain in PVC?
|
A. They are all 109.5°
B. half are 109.5° and half are 120°
C. They are all 120°
D. They are all 180°
|
| 7 |
Which of the following elements is most metallic
|
A. Bi
B. sb
C. As
D. P
|
| 8 |
The B.P of glycerine at 760 torr pressure is
|
A. 200°C
B. 290C°
C. 250C°
D. 262C°
|
| 9 |
Polyesters resins have special use in:
|
A. Clothing
B. Paints
C. Emulsion
D. Floor covering
|
| 10 |
By the electrolysis of CuCl2 using inert electrodes of platinum which species is deposited at cathode
|
A. H2
B. O2
C. Cu
D. CI
|
| 11 |
If ionic product is equal to Ksp then the solution is
|
A. Unsaturatec
B. Ideal
C. Supersaturated
D. Saturated
|
| 12 |
The synthesis of ethene from ethyl alcohol is a reaction
|
A. Dehydration
B. Polymerization
C. Addition
D. Substitution
|
| 13 |
Which is not a component of environment?
|
A. Biosphere
B. Lithosphere
C. Hydrosphere
D. None of these
|
| 14 |
Which one of the following polymer is called as Nylon 6,67
|
A. Polyester
B. Polyvinyl chloride
C. Polyemide
D. Polyvinyl acetate
|
| 15 |
Which is most acidic?
|
A. H2O
B. C2H5OH
C. C4H9OH
D. CH3-CH2-CH2OH
|
| 16 |
Which one of the following is more acidic
|
A. Phenol
B. Carboxylic acid
C. Alcohols
D. Amines
|
| 17 |
SO2makes ___________ acid rains
|
A. carbonic acid
B. Sulfuric
C. Nitric acid
D. All of these
|
| 18 |
With the help of spectral data given calculate the mass of Neon and encircle the best option.
|
A. 22.18 amu
B. 21,18 amu
C. 20.18 amu
D. 22.20 amu
|
| 19 |
H3O+ can't accept a Ip because
|
A. it has positive charge
B. The central atom is not electron deficient
C. The shell of oxygen has reached its limit
D. it already has a coordinate bond
|
| 20 |
Which property is not present in lipids?
|
A. Liquid
B. Solid and semi solid
C. Soluble in water
D. Form emulsion
|
| 21 |
Cement is mixture of so many compounds roasted in rotary kiln.Which substance has greater percentage:
|
A. Lime
B. Alumina
C. Silica
D. Magnesia
|
| 22 |
pi-bond can be formed by sideways overlap of
|
A. s-orbital
B. d-orbital
C. p-orbital
D. sp orbital
|
| 23 |
The film forming components of paints are
|
A. resins
B. thinners
C. pigments
D. driers
|
| 24 |
The most abundant protein in the human body is
|
A. Collagen
B. Keratin
C. Myosin
D. Albumin
|
| 25 |
According to Lowry-bronsted acid and bass concept, H2O is
|
A. A salt
B. An acid
C. A base
D. An amphoteric species
|
| 26 |
Term ozone hole is used for depletion of ozone during months of:
|
A. Jan-Feb
B. March - Sep
C. Sep- Nov
D. Dec-Feb
|
| 27 |
Ecosytem is a smaller unity of:
|
A. nydosphere
B. biosphere
C. lithosphere
D. atmosphere
|
| 28 |
Which alkaline earth metal makes peroxide?
|
A. Ba
B. Be
C. Mg
D. Ca
|
| 29 |
Which af the following compound reacts slower than benzene in the electrophilic substitution.
|
A. Phenol
B. Nitrobenzene
C. Toluene
D. Aniline
|
| 30 |
Saturated hydrocarbons having carbon atoms more than 20 in a molecule are solids due to
|
A. higher densities
B. higher molar masses
C. the chain, are more zig-zag
D. all are correct
|
| 31 |
The substance upon which an enzyme acts is known as its
|
A. domain
B. field
C. substrate
D. reactant
|
| 32 |
Nucleic acid fist descovered in
|
A. 1868
B. 1869
C. 1900
D. 1905
|
| 33 |
Lipids are naturally occurring compounds produced in cell and are water insoluble but soluble in organic solvents. One of the followings is not a lipid. Select among the following
|
A. Nucleic acid
B. A triglyceride
C. Sterol
D. Vitamin D
|
| 34 |
Helium atom is two times heavier than a hydrogen molecule. At 298 K, the average kinetic energy of a helium atom is
|
A. same as that of a hydrogen molecule
B. half that of a hydrogen molecule
C. two times that of a hydrogen molecule
D. four times that of hydrogen molecule
|
| 35 |
The electrical conductivity of the metals decreases with the increasing temperature. This is because
|
A. the number of free electrons decrease
B. the bonds of the metal atoms become weak
C. the to and fro motion of the metal ions decrease
D. the increase of to and fro motion of the metal ions hinders the free movement of electrons
|
| 36 |
Which one of the following compounds act as catalyst when alcohols react with carboxylic acids.
|
A. Pt
B. Conc. H2SO5
C. Conc HNO3
D. Ni
|
| 37 |
Electrons in 5d energy level are filled up in case of
|
A. Lanthanides
B. Transition metals
C. Actinides
D. Rare gases
|
| 38 |
The element which shows highest binding energy
|
A. V
B. T
C. So
D. Cr
|
| 39 |
Which of the following is a non-typical transition element?
|
A. Cr
B. Zn
C. Mn
D. Fe
|
| 40 |
In most of the cases the molecular crystals are
|
A. very soft
B. soft
C. extremely hard
D. sufficiently hard
|
| 41 |
Hardness which can be removed by boiling is called
|
A. Permanent hardness
B. Temporary hardness
C. Stiffness
D. Toughness
|
| 42 |
Polymerisation of vinyl acetate is a type of:
|
A. homopolymer
B. copolymer
C. ter polymer
D. All of these
|
| 43 |
If a salt bridge is removed from two half cells the emf is
|
A. Increased
B. Decreased
C. Dropped to zero
D. Electrodes will be reversed
|
| 44 |
One dm3 of H2 and O2: has different masses but no. of particles are
|
A. same
B. H2 has greater
C. different
|
| 45 |
If a strip of Cu metal is placed in a solution of FeSO4
|
A. Cu will be deposited
B. Cu and Fe both dissolve
C. Fe is precipitated out
D. No reaction take place
|
| 46 |
Estyl butyrate has flavour like
|
A. Banans
B. Jasmine
C. Pineapple
D. Orange
|
| 47 |
Anthracene contains number of fused benzene rings
|
A. 1
B. 2
C. 3
D. 4
|
| 48 |
Plastics are pollution problem because many plastics:
|
A. are made from petroleum
B. are very inflammable
C. burn to produce toxic fumes
D. decompose to produce toxic products
|
| 49 |
The fibre which is obtained from naturally occuring protein is called
|
A. saran
B. azlon
C. rayon
D. nylon
|
| 50 |
The fibre which is made form acrylonitrile as monomer
|
A. PVC
B. rayon fibre
C. acrylic fibre
D. polyester fibre
|
| 51 |
Which of the following is not glyceride
|
A. Soap
B. Phospholipids
C. Oil
D. Fat
|
| 52 |
Plastic, rubber, synthetic fibers belong to macromolecules:
|
A. Inorganic
B. organic
C. Biopolymer
D. synthetic
|
| 53 |
A polymer of PVC having D.P 500 has molar mass:
|
A. 6300
B. 63000
C. 3150
D. 31500
|
| 54 |
Elements in lithosphere exist generally as:
|
A. metals
B. non-metals
C. metalloids
D. minerals
|
| 55 |
How much heat is absorbed by 100 g of water when its temperature decreases from 25°C to 5°C? (heat capacity is 4.2 J/gK)
|
A. 84,000J
B. 2000/4.2J
C. -2000/4.2j
D. -8400J
|
| 56 |
Asbestos is commonly used in making
|
A. wall board
B. black board
C. soft board
D. hard board
|
| 57 |
Natural water is
|
A. Pure
B. Impure
C. Acts as solute
D. Distilled
|
| 58 |
2,5-dimethyl-1-hexene has
|
A. Two sp2 hybridized carbons
B. Six sp2 hybrid carbons
C. Two double bonds
D. Four pi electrons
|
| 59 |
Chemical like Al2(SO4) or alum are used in purification of water druing step:
|
A. aeration
B. coagulation
C. chlorination
D. treatment
|
| 60 |
All amino acids are optically active except
|
A. Amino acid
B. Series
C. Threonine
D. Tryltophan
|