Friday 22 June 2012

Chemistry mcqs

Saturday 9 June 2012

mcqs

Q:Second ionization energy

a. is always less than first ionization energy

b. is always greater than first ionization energy

c. is equal to the first ionization energy

d. may be greater or less than the first ionization energy depending on the nature of the element

Q:Thie shape of a 2s orbital resembles:

a. a hockey puck

b. an (American) football

c. an ellipse

d. a sphere

Q:Which of the following has the highest energy?

a. gamma rays

b. X-ray

c. Ultra-violet radiation

d.radio waves

Monday 4 June 2012

UNIVERSITY OF ENGINEERING AND TECHNOLOGY, LAHORE

ENTRY TEST AND UNDERGRADUATE

ADMISSION 2012

Announcement for conduct of UET Lahore Entry Test is expected in August 2012. Admission

process shall subsequently start. Candidates are required to submit certain documen ts along with

the application for Entry Test and for Admission.

It is hereby announced for the information of all interested candidates that they must be in

possession of the following documents before August 2012. No applications shall be entertained

without required documents.

1. Domicile Certificate.

2. Computerized National Identity Card or Computerized B-Form from NADRA.

3. Certificate, Diploma, Degree or Detailed Marks Certificates of all the examinations on the basis of which

admission is sought i.e. H.S.S.C., Diploma of Associate Engineer, B.Sc., B.Tech. (Pass).

4. Six (6) passport size recent photographs.

5. Applicants having equivalent foreign qualifications (e.g. A-levels) must obtain Equivalence Certificate from

I.B.C.C. (Inter Board Committee of Chairmen).

6. If you are applying against reserved seats for the Children of Overseas Pakistanis you are required to submit

following additional documents:

i. An employment certificate in original (on Form-VIII) of applicant’s Parent (father/mother)in a foreign country

issued by the Pakistani Embassy in that country. Form-VIII can be downloaded from our website or can be

obtained from the office of the undersigned.

ii. A photocopy of resident visa of applicant’s Parent (father/mother), attested by the Pakistani Embassy in

that country.

iii. Orphan candidates meeting eligibility requirements may be sponsored by their real brother, real maternal or

real paternal uncle. Such candidates shall submit an attested photocopy of father’s death certificate along

with Form-VIII and acceptable proof of relationship with the sponsor.

Note : Scanned / faxed copy of employment certificate and visa shall not be entertained.

contact at 042-99029452, 99029216, 99029470.

CHAPTER NO 1 PART 2

1. The set of first element of all ordered pairs of a binary relation is called its

(a) Range (b) Domain

2. If every member of a set A is also member of set B, then

(a) A is subset of B (b) A is super set of B

3. A quantity which does not remain fixed is called a

(a) Variable (b) Constant

4. If f is a function f: Xà Y, then Y is called

(a) Domain (b) Co-domain

5. If y is a function of x, then y is called

(a) independent variable (b) Dependent Variable

6. If A and B are non-empty sets, then A × B is

(a) {(x, y) / xÎ A Ù y Î B} (b) {(x, y) / xÎ A Ú y Î B}

7. Any subset of A × B is called a

(a) binary relation (b) binary operation

8. x is function of y is written as

(a) y = f(x) (b) x = f(y)

9. If a function f: Xà Y is such that "x1, x2 Î X , x1 ¹ x2 Û f (x1) ¹ f (x2 ) , then f is called

(a) Onto (b) (1-1)

10. For a function f: Xà Y, if Range = Y then f is called

(a) Onto (b) (1-1)

11. Onto function is also known as

(a) Surjective (b) Injective

12. If a degree of polynomial function is 2, then function is

(a) Linear (b) Quadratic

13. The function y = loge x is called __________ Logarithmic

(a) Common (b) Natural

14. The equation of the form x = f(t), y = g(t) where t is parameter are called

(a) Implicit equation (b) explicit equation

15. If f(x) = Sinx + Cosx then f is __________ function

(a) Odd (b) Even

first year physics mcqs chpater no:1

1, In high energy physics scientist study:

a, matter b, big particles

c, elementary d, ions

2, Wave theory of light was presented by:

a, Newton b, Maxwell

c, Compton d, Huygens

3, Natural Radioactivity was disobeyed by Decree in.

a, 1976. b, 1896.

c, 1996. d, 1916.

4, X – rays were discovered by,

a, J.J. Thomson.

b, Crooks.

c, Lorenz.

d, Roentgen.

5, The circumference of the earth was determined by,

a, Albernie.

b, Al – Khawririmi.

c, Omer Khayyam,

d, Ibn – al – Haitiam.

6, The pioneers of physics are

a, Greeks

b, Egyptians

c, Babylonians

d, Chinese

7, which one of the following is not a unit of length

a, Angstrom

b, Micron

c, Radian

d, Light year

8, Which one of the following is not regarded as a fundamental quantity in physics

a, Length

b, Mass

c, Time

d, Weight

9, Zero is significant only if it

a, Lies to the left of a significant digit

b, is between two digits

c, is to the right of a significant digit

d, is before the decimal point

10, A Second is defined as the duration of vibration of

a, Carbon atom

b, Cesium atom

c, Radium atom

d, Nitrogen atom

11, The dimension of the following pair is not the same

a, work & energy

b, work and torque

c, Momentum & impulse

d, Mass & moment of inertia

10, The decimal system was introduced by

a, Greeks

b, Egyptians

c, Chinese

d, Indians

11, The unit of Plank’s constant is

a, Joule /sec

b, Joule x sec

c, Joule x m

d, Joule / m

12, The error in measurement may occur due to

a, inexperience of a person

b, The faulty apparatus

c, Inappropriate method

d, Due to all reasons in a, b and c

13, In any measurement the significant figures are

a, all accurately known and all doubtful digits

b, only accurately known digits

c, only doubtful digits

d, all accurately know digits and the first doubtful digit

14, A digit zero in a measurement

a, may be significant may not significant

b, always significant

c, always insignificant

d, significant only if left to a significant figure

15. Which one is the highest power multiple?

a, giga b, beta

c, mega d, deca

16, Unit of G is ?

a, Nm²kg² b, N m²kg

c, N m²kg^-2 d, none

17, The unit of force is ___________ and its symbol is _____________ which is the correct pair?

a, Newton, n b, Newton, N

c, newton, n d, newton, N

.18, Which one is the correct representation of the unit of pressure?

a Newton/Meter²

b, newton/meter²

c, Newton/meter²

d, Newton/Meter²

19, 1024 can be written in scientific notation as

a, 1.024x 10³ b, 2¹⁰

c, 0.000976 d, 1/0300097

20. Number of significant figures in 0.0173 are

a, Three b, four

c, five d, two

21. The dimension of force is

a, MLT^-1 b, MLT^-2

c, ML^-1T d, ML^-1T²

22. ML^-1T^-2 is the dimension of

a, force b, pressure

c, momentum d, energy

23. Which equation is not dimensionally correct?

(a) E = mc²

(b) Vf = Vi + at

(d) S = 1/2at²

24. Three students measured length of a needle with meter rod and recorded as:

(i) 0.2145m (ii) 0.21m

(iii) 0.214m

25, Which one is correct record?

a, only (i) b, only (ii)

c, only (iii) d, both (i) and (ii)

26. Which one is the dimensionally correct equation?

a, f = vt

b, S = Vit+1/2at²

c, V = St

d, V= f/t

27. A metal sphere of radius r is dropped into a tank of water. As it sinks at speed v, it experiences a drag force F given by F = kr v, where k is a constant. What are the SI base units of k?

a, kg m2 s–1 b, kg m–2s–2

c, kg m–1s–1 d, kg m s–2

28, Wave theory of light was presented by:

a Newton b, Maxwell

c, Compton d, Huygens

29, Einstein presented his famous theory of relativity in:

a, 1975 b, 1955

c, 1905 d, 1805

20, Muslims in the early ages translated science books into Arabic from which language?

a, English b, Spanish

c, French d, Greek

31, Al-Beruni determined

a, Area of the moon

b, Circumference of earth

c, Modern electronics

d, Radioactivity

32, The unit of Luminous Intensity is:

a, cadela b, candela

c, cdanela d, caladela

33, Which of the following us SI base unit?

a, gram b, slug

c, Newton d, Kilogram

34, Which one of the following shows only unit of length:

a, A^o, kg, gm b, M, m³ , s

c, A^okm , m d, Gm, m2, deci-m

35, Meter is defined as the distance traveled by light in vacuum in:

a, 1 second

b, 299792458 second

c, 1/299792458 second

d, 165076373 second

36, The dimensions of stain are

a, [MLT²] b, [ML^-2T]

c, [M^o L^o T^o] d, [M^-1L^-1T^-1]

37, Which of the following physical quantities is represented by dimensions M^-1 L¹ T²

a, gravitational constant G

b, coulombs constant

c, young,s modulus

d, plank,s constant

38, The dimension of angular velocity is:

a, A. M^o L^o K-¹b, ML² L^-1 K

c, M^o L^o K-¹d, T^-1

39, One mile is equal to:

a, 1699m b, 1799 m

c, 1809 m d, 1609m

40, 1 mc³=

a, 0.01 mc³b,1000 mm³

c, 0.001 m³ d, 100 cm³

first year chemistry mcqs chapter no 1

Chapter 1Fundamental Concepts in Chemistry

Q. 1.    The soul of chemistry is its dealing with
a.            Internal structural changes in matter
b.            Composition of matter
c.            Properties of matter
d.            Composition and properties of matter

Q. 2.    All of the following statements are incorrect for 20 mol of hydrogen peroxide except
a.            it has 20 mol of hydrogen atoms
b.            it has 30 mol of oxygen atoms
c.            it has 80 mol of atoms
d.            30 mol of hydrogen atoms

Q. 3.    If proton number of two atoms is same then it can be concluded that
a.            they are isotopes
b.            compounds of both with CI₂ will be similar in reactivity towards other compounds
c.            both have same colors
d.            both have same melting point
Q. 4.    A chemist poured lemon juice on soil, the idea that he may have in his mind is that
a.            there may be a possibility of a chemical reaction
b.            lemon juice is dangerous to health
c.            lemon juice is dangerous to health
d.            water should be preferred over lemon juice for drinking
Q. 5.    Dr. Khan has discovered two isotopes of an element with atomic number 119. The relative abundance of isotopes ₁₁₉Uue³⁰⁰ and ₁₁₉Uue³⁰⁵ is 70% and 30% respectively. The average atomic weight of Uue is
a.            301.5 a.m.u
b.            302.5 a.m.u
c.            303.5 a.m.u
d.            304.5 a.m.u  Q. 6.    Which of the following is not related to a.m.u
a.            gram
b.            kilogram
c.            microgram
d.            gram/lit

Q. 7.    The number of significant figures in 0.00200 is
a.            two
b.            three
c.            five
d.            one

Q. 8.    All of the following statements are incorrect except
a.            precision and accuracy should go side by side in a scientific work
b.            scientific work must be precise, accuracy is not essential
c.            scientific work must be accurate, precision is not essential
d.            +calculations must be made before any experiment

Q. 9.    Empirical formula and formula unit of an ionic compound
a.            are always similar
b.            are always different
c.            may be similar or different
d.            ionic compounds don’t’ have any empirical formula
Q. 10. Copper (II) oxide is mixed with organic compound during combustion analysis. The purpose is
a.            to carry out complete combustion
b.            to reduce the economy of the process
c.            to reduce the time for completion of the reaction
d.            all of the above

Q. 11. Bismark brown is a dye. Its molar mass is 228.3 g/mol. When the dye was analyzed by a scientist, it was found that it contains 30.68% nitrogen. How many nitrogen atoms are there in each Bismark brown molecule?
a.            6
b.            5
c.            4
d.            3

Q.12.   The mass of 2 mole of sodium hydroxide will be
a.            2 g
b.            20 g
c.            40 g
d.            80 g

Q. 13. “A” compound is always consists of the same elements combined in the same fixed ratio”. The statement is
a.            a hypothesis
b.            a fact
c.            a law
d.            an observation

Q. 14. Compound having highest boiling point among the following is
a.            HF_(I)b.            HCI_(I)c.            HBR_(I)d.            HI_(I)

Q. 15. Islamian genius investigated that the amount of heat required to raise the temperature of 11 gram of water form 30^oC to 31^oC is
a.            one calorie
b.            little bit greater than on calorie
c.            little bit less than one calorie
d.            never equal to one calorie

Q. 16. An atom is
a.            smallest indivisible particle in an element
b.            smallest particle of an element which can undergo a chemical reaction
c.            building block of an element
d.            always smaller than molecule
Q. 17. 10 moles of H₂O contains
a.            100 moles of bonds
b.            100 moles of electrons
c.            30 atoms
d.            25 moles of hydrogen bonds

Q. 18. The volume of one kilogram of water at 4^oC is equal to one litre. The temperature of water is kept at 4^oC because water
a.             has no dissolved gasses at this temperature
b.             has maximum density at this temperature
c.              polarity of water molecule is least at this temperature
d.             dipole moment has maximum value at this temperature
Q. 19. A compound contains two elements X and Y percentage of X is 20% (At.wt = 40) and that of Y is 80% (At.wt =80). The empirical formula of the compound is
a.            XY₂b.            X₂Y
c.            X₃Y
d.            XY

Q. 20. A piece of paper is burnt in air, the gas produced is passed through distilled water. The PH of water solution will be
a.            1
b.            7
c.            2.1
d.            6.8
Q. 21. Which of the following is a substance?
a.            sea water
b.            brass
c.            tape water
d.            graphite

Q. 22. Freezing point of a substance is a temperature at which a liquid substance is converted to solid, it is
a.            always lower than its melting point
b.            usually a little lower than its melting point
c.            always higher than its melting point
d.            exactly the same as its melting point
Q. 23.  Number of covalent bonds in 10 mol of carbon tetrachloride is
a.            2.4 x 10²⁵b.            40
c.            4 x 10²⁴d.            6.4 x 10²¹

Q. 24. A student subtracted 0.00055 from 10.2345678 and reported the result as 10.23401. But his friend told him that the result was wrong. What is the correct result?           a.            10.234017
b.            10.2340178
c.            10.234
d.            10.23
Q. 25. The following statement contained in a student’s laboratory report is a conclusion.           a.            a gas is liberated
b.            colour of the gas is greenish yellow
c.            oxide of the gas is strongly acidic
d.            the gas is chlorine
Q. 26. If 10g each of uranium and hydrogen are converted into energy according to equation E = mc²           a.            energy obtained from uranium will be too much greater than that of hydrogen
b.            energy obtained from hydrogen will be a little bit less than that of uranium
c.            energy obtained from hydrogen and uranium will always be exactly equal
d.            diamond
Q. 27. A student analyzed a sample of sea water and found that it contained 2.3g of NaCi, 0.005g of MgSo₄, 0.234g of CaCI₂ and 60.12g of H₂O. Total mass of the sample is
a.            62.659
b.            62.65
c.            62.70
d.            65.7
Q. 28.  A 50.00 mL sample of a cough mixture prepared by a pharmacist was found to have a mass of 46.0g. what is the density (in g/mL) of this mixture. Stated to the correct number of significant figures?
a.            0.92
b.            0.920
c.            0.9200
d.            1.087

Q. 29. Ozone (O₃) filters the cosmic rays of sunlight. How many oxygen atoms are there in 0.2 mole of ozone (O₃, molar mass 48.0 g/mol)?
a.            6.02 x 10²²b.            6.02 x 10²³c.            3.61 x 10²³d.            6 x 10²³

Q. 30. On heating, the hydrated salt CaSO₄, xH₂O loses its water of crystallization. In an experiment it was found that when 0.2 mol of the hydrated salt was heated 0.10 mol of water was lost. What is the molecular formula of the hydrated compound?
a.            CaSO₄b.            CaSO₃. ½ H₂O
c.            CaSO₄.H₂O
d.            CaSO₄.2H₂O

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