Nust Important MCQS

Nust Important MCQS

1)The Swedish chemist J. Berzelius determined thc atomic masses of elements. HE is  also known for

(a) Discovery of isotopes 

(b) Developing  the system of naming of elements  in Greek

(c) Determination of the number of atoms in a mole

(d) Developing the system  of giving elements the symbol

2) A neutral solution when exposed to air bceomes acidic because of

(a) Evaporation

(b) Release of CO2

(c) Absorption of C02

 (d) Absorption of 02

(e) Release of O2

3) Sodium Chloride is extracted from sea water by

(a) Solvent extraction

b)  Evaporation

(c) Freezing

(d) Sublimation

(e) Filtration

4) which of the following processes can be used for industrial preparation of hydrogen?

(a) Reaction of coke and water

(b) Lane,s process

(c) Electrolysis of water

(d) Using natural gas

(e) All of ttre above

5)When HNO3 the gas, CO2 is released.When the same acid reacts with NaHCOs, then the gas released is

(a) NH3

{b) CO2

(c) NO2

(d) H2

6) Penultimate shell in Transition metal is expanded to

(a) 8 Electrons

(b) l0 Electrons

(c) I4 Electrons

(d) 18 Electrons

(e) 32 Electrons

7 )The compound K2MnO4 is know as

(a) Potassium  permanganate

b) Dipotassium  magnetitc

c) Potassiun     magnate

d) potassium   diamante

8) Which of the following is a class of metallic corrosion?

(a) Atmospheric corrosion

(b) Underground corrosion

(c) Chemical corrosion

 d) All of above

9) One of the following is not  a postulate of the Kinetic Molecular Theory of Gases?

(u) molecules gas remain state and sphere about their mean position

(b) Every gas consists of a large number of molecules

(c] collision between the gas molecules is purely elastic

 d)The  molecules of a gas are-widely separated from each other

10) Ethylene can be prepared, on a small scale in the laboratory,by the action of H2SO4

a)  sodium propionate

 b) ethyl alcohol

(c) Ethyl iodide

(d) Acetylene

11) A bond between which of the following is a sigma bond?

(a) Is orbital of two Fluorine atoms

(b) P2  orbital of two fluorine  atoms

 c)  Is orbital of hydrogen atoms & P2 orbital of fluorine atoms

(d) All of the above

    

12)The reaction given below was  allowed  to reach equilibrium

                          2A(aq) + B(aq) -------- C(eq)

The initial amounts of the reactants present in 1 dm3 of solution were 0.50 mole of A,0.60 mole of B. At equilibrium, the emomts were 0-20 mote of,t,b.+s mote orn ria-O.rS mole of c- the equilibrium constent tre of thc rcactions is

 a)  0.12       

 b)  0.9      

 c)  5.0        

 d)  8.3

13) The value of proportionality constant  remains same in boyles law for

 a) Same  quantity of differeat gases       (b) Different quantities of same gas

(c) Different quantities of different gases  (d)None of the above

14) A steel razor blade can be made to float on water because

(a) The density of steel is lower than water (b) The density of steel is higher than water

(c) Of the particular shape of the razor blade (d) Of the oily surface of the razor blade

15)The activity of enzymes

a)Does,nt varies with acidity      b) Varies fast with acidity

b)Varies minimally with acidity  c)varies randomly with acidity

16)Which of the following is NOT a charactersitic  of  crystal?

(a)anisotropy

b)hardness & elasticity

c)sharp melting point

d)varying heat of fusion

17)Cracking of hydrocarbons results in

 (a) Smaller and  volatile molecules         (b)smaller &  and more stable molecules

(c) Larger and more voltile molecules      (d) Larger and rnore stable molccules

18) In the measurement of vapour pressure by the manometric method, in order to get rid of the air in the random the flash

(a) An inert gas is bubbled through liquid  (b) The liquid is first boiled & then cooled

(c) Th liquid is first frozen & then melted   (d)A small amount  of alcohol is added

19) Which of the following statement is correct?

(a) We can find out exact position of an electron in  atorn

(b) We can accurately determine  momentum of an electron is an atom

G) We can determine exact position of an electron when  it is in an brbit for which

principal quantum number,  n= 1

(d) We can find pobable position  of electron in an atom

(e) We can determine the exact t energy of an electron

20) Which of the following is not produced in fractional distillation of coal tar?

(a) Coke (b) Benzene (c) Toluene

 (d) Xylene (e) Phenol

21)Enthalpy is an expression for the

(a)   Energy  state

 b)  Reaetion state

(c)  Heat content

(d)  Activation energy

22) Which of the following solution is called   bufier?

(a) Solution continuing NaOH and NH4OH

(b) Solution of CH3CO2H and NaOH

(c) A mixture of CH3CO2H and HCL

(d) Solution of Na2S04 and H2SO4

23) The polymer that has a characteristic odour and has a general  use as  an adhesive  material is

(a) Polyvinyl acetate b) Polystyrene (c) Polyvinyl chloride (d) Polaride

24) Which onc of the following  is NOT TRUE?

(a) Cathode rays produce greenish fluorescence on striking the glass wall

(b) Cathode  rays cast a shadow when an opaque subject is placed in their path

(c) Cathod  rays possess rnometum

(d) Cathode  rays are bent towards the North pole of magnetic field

25) The only group of lines occurring in the visible  region of the hydrogon spectrum is labeled as the

(a) Paschen series (b) Pfund series (c) Balmer series (d) Lyman series

26) Filtration process involves the separation of

a)precipitates from liquids     b)insoluble particles from liquids

c)collidal particles  d)solid particles

(e) All of the above

27) An antiknock gasoline agent is formed by the reaction of Na-Pb alloy with

 (a) Alkane         (b).Acid amides

(c) Alkyl halide  (e) Alkyl amine   (d) Alkyl  amide

28)If you were to setup an artilicial leather factory. Which of the following acids will heve tte widest epplications?

(a) Sulfuric (b) Hydrochloric (c) Acetic (d) Carbonic

(e) None of the above

29 Which of the fotlowing is thermosetting plastic?

(a) Bakelite    (B) Nylon

(C) Pvc   (E) Polythene   (d) Asbestos

NET-1 (29 Dec -2014)

30) -Pick the odd one out

a)Cot          b)Pillow

c)Sheet      d)Blanket

31)(30th December evening(NET 1)Which has maximum BP?

a)Ethanol     b)Propanol    c)Methanol    d)2.hexanone

(20th December evening(NET 1)

32)If the area of square is 625,its perimetre will be?

(a)25   (b)50   (c)100  (d)200

 (NET-1 (29 Dec -2014)

33)Newton is the unit of

a)Work  (b)Power (c)Force  (d)None

(24th December evening(NET 1)

34)Derivative of cos@ with respect to tan @?

35)( NET-1 (29 Dec -2014)Iodoform test is used to distinguish ketones from?

(30th December evening(NET 1)

36) Sum off all 100 integers?

a)8050        b)8500       c)8550    d)5050

(30th December evening(NET 1)

37)The speed of _____ rays equals the speed off light

a)alpha          b)beta         c)gamma       d)none

NET-1(22-DEC-2014)

38)THE OPPOSITE OF FOE IS

a)cruel             b)bad

c)pretty            d)friend

( NET-1 (29 Dec -2014)

39)DIRECTION OF WAVES IN SURFACE RIPPLES?

a)x-x"

b)y-y"

c)eveywhere

d)none

NET-1 (29 Dec -2014)

40)The period of sinx/2-cosx/2

a)2pie        b)4pie         c)-2pie       d)none

NET-1(21 DEC -2014)

41)What kind of discontinuity is removable in graph of non linear functions involving second order  derivatives?

a)jump               b)asymptotic

c)point              d)multi-point

42)Flux passing through a area does not depend upon

A. Charge inclosed   B. Shape of hypothetical surface

C. No of line passing through the area   D. None.

(22-DEC-2014)

43)Domain of sinh-1 3x is

a.[1/3,-1/3]                    b.[1,-1]

c.[pie/2,-pie/2]             d.both a and b

23-DEC-2014)

44: Paramagnetism is due to

a.unpaired electron                     b.paired electron

c.complete valence shell            d.ionizationQ

NET-1(20-DEC-2014)

45)Which metal is not attracted by magnet

a.copper            b.zinc.

c.iron                 d.nicke

NET-3( 6-July (2014)

46) The distance of (3,0) from 3x-4y +6=0 is

a) 1                b) 2

c) 3                d) 4

NET-1 (21-DEC-2014)

47)A coil is placed near a MAGNET... Emf will be induced in it when :

A. Area of coil is changed.     B. Coil is rotated

C. Magnet which was placed at a distance is moved closer to it .

D. None

48)The absence of ____enzyme may cause lysosomal storage diseases..

A)Alpha-glucosidase      B)Alpha-glycodase

C)Hydrolase                   D)Oxidase

49)The isolation of cell components is called.?

A)Isolation                   B)Composition

C)fractionation            D)None

50)The expression for the time to reach the maximum height of  the projectile is ____

A)vi sin2@/g               B)2vi sin@/g

C)vi sin@/g               D)None