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UPDATED MTH 101and BIO 101 PAST QUESTIONS AND ANSWERS

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Questions

1.One of the roots of the equation 6y²=5-7y

A)-1/2

B)-1/3

C)5/3

D)1/2

Answer;D. (Use calculator directly)

2.The equation whose roots are y=7 and y= -2

A)y²+2y-7=0

B)y²+5y+14=0

C)y²-2y+7=0

D)y²-5y-14=0

Answer;D

3.The quadratic equation

y²-(k-2)y+2k+1=0 has equal roots,valued of k are?

A)1,2

B)12,0

C)4,5

D)3,4

Answer:B

4.If the equation px²-6x+1=0 has equal roots,the value of p is

A)9

B)6

C)7

D)2

Answer; A

5.The positive root of the equation 4x²+7x=1 correct to 3 decimal places

A)10.623

B)1.062

C)0.322

D)0.133

Answer:D

6.Find the greatest coefficient of (7+5x)^-3

A)0.0114

B)0.0014

C)0.1114

D)0.114

Answer:A (Shortcut method available for this question,contact us)

7.Find the constant term in the binomial expansion of (2x²-1/x)^6 using the binomial expansion

A)60

B)-60

C)64

D)240

Answer;A

8.Find the term in x² in the expansion of (x-1/2x)¹²

A)-99x²/4

B)99x²

C)9x²/4

D)198x²/4

Answer;A(Shortcut available)

9.Using the expansion of (1+8x)⁴=(1.04)⁴.What is the value of x?

A)0.5

B)0.005

C)0.05

D)0.0005

Answer:B

10.Find the value of x to be substituted in the expansion of (1+8x)⁴=(3√3/5)^8

A)0.1

B)0.01

C)0.001

D)0.0001

Answer: B

11.Given the sequence 5,1,-3……. which of the sequence is -75

A)20th

B)23rd

C)22nd

D)21st

Answer:D

12.What is the nth term of the A.P 12,5,-2?

A)7n-19

B)9n-7

C)7n-19

D)19-7n

Answer:D

The above questions and answers are LAUTECH Past questions and answers.

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LAUTECH MTH 101 PAST QUESTIONS AND ANSWERS

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Questions

1.In a class of 45 students,every students offers either phy or Bio or both.If 25 students offer Phy while 34 offers Boo,how many students offers both subjects?

A)20

B)15

C)11

D)14

Answer;D

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2.If P={3,1,0,5} Q={7,6,5} then P U Q U R is

A){3,8}

B){5}

C){1,2,3,4,5,6,7}

D){0,1,2,3,4,5,6,7,8}

Ans;D

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3.In a literal language A n B is obtained by…..

A)Coupling

B)Differentiating

C)Integrating

D)Selecting

Answer;D

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4.A set is a collection of …….

A)Functions.

B)Numbers

C)Objects

D)Points

Answer;C

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5.The word infinity is a

A)Real number

B(Complex number

C)An integer

D)Constant number

Answer;C

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6.The sets of complex numbers is denoted by

A)C

B)N

C)Z

D)I

Answer;D

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7.The set of compliment A’ are

A)Emtpty set

B)Finite set

C)Disjoint set

D)Infinite set

Answer;A

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8…….is a subsets of every sets

A)Infinite set

B)Disjoint set

C)Empty set

D)Finite set

Answer;C

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9.To say that a set A is equal is to say that the have the same

A)Figures

B)Objects

C)Numbers

D)Elements

Answer;D

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10.The sets of Natural numbers is denoted by

A)N

B)R

C)I

D)Z

Answer;A

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The above questions are LAUTECH MTH101 past questions and answers.

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EASTER GIVEAWAY PRIZES

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UPDATED LAUTECH CHM101 PAST QUES6TIONS

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Due to many people pleading for more posts of past questions on CHM101 I have decided to publish some other questions.Read…………

1.The fraction of collision that brings about reaction is called…….

A)Energy collision

B)Effective collision

C)Collision factor

D)Frequency of collision

Ans;B

2.In a chemical reaction ,after 30s, 10moles from the initial concentration of 25moles of the reactant disappeared.The rate constant for the reaction is……

A)1.70×10^-²

B)1.20

C)3.05×10^-²

Ans;A

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3.A first order reaction is 40% complete after 20min the time taken for the reaction to be 65% complete is…….

A)35.02min

B)60.40min

C)0.025min

D)41.17min

Ans;D

4.What is the relative rate of diffusion for hydrogen molecules compared to those of oxygen molecules at the same temperature

A)4

B)2

C)6

D)8

Ans;A

5.The secondary quantum number determines the…….

A)Shape

B)Size

C)Energy

D)Shell

Ans;A

6.Inability of a scientists to judge color change correctly during acid base titration is an example of

A)Operative error

B)Personal error

C)Methodical error

D)Instrumental error

Ans:B

7.Solve the following and round off to the correct number of significant figures 5.61×7.891÷9.1

A)4.9

B)4.924

C)4.09

D)4.91

Ans;B(correct to 2 Sig fig)

8.A reducing agent does

A)Accepts electrons

B)Donates electrons

C)Donates proton

D)Donate a lone paid of electrons

Ans:D

9.The difference between an acid and its conjugate bases

A)Neutron

B)Proton

C)Positron

D)Electron

Ans;B

10.A temperature at which the water vapor present in the air is just sufficient to saturate it is called

A)Steam point

B)Dew point

C)Melting point

D)Ice point

Ans:B

The above questions are standard LAUTECH CHM101 Questions and answers.

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LAUTECH 2007/2008 CHM101 PAST QUESTIONS AND ANSWERS.

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Questions

The molar concentration in moldm`3 of a solution is determined by four separate titrations,the results being

0.2041,0.2049,0.2039, and 0.2043

Use the above data to answer questions 1-3

1.Calculate the mean and mean respectively

a)0.2043,0.2042

b)0.2045,0.2042

c)0.2042,0.2045

d)0.2043,0.2042

Ans; D

2.Calculate the average deviation and relative average deviation respectively

a)0.003,160ppt

b)0.0003,0.15ppt

c)0.0002,1.5ppt

d)0.0003,15ppt

Ans;

3.Calculate the standard deviation and coefficient of variation respectively

a)0.0004,2%

b)0.004,0.2%

c)0.0004,0.2%

d)0.0004/0.02%

Ans: C

4.What is the relative rate of diffusion for hydrogen molecules compared to those of oxygen molecules at the same temperature?

a)2

b)6

c)8

d)4

Ans; D

Click to view previous questions and answers on CHM 101

5.One of these is not a magic number

a)2

b)12

c)50

d)20

Ans;B

6.The sign of entropy change of a reaction for a reaction

NH4CL(s)———–NH3+HCL

a)Zero

b)Positive

c)Unchanged

d)Negative

Ans;B

7.A nuclei represented by ¹²ⁿX is likely to decay by

a)Proton emitter

b)Electron capture

c)Stable nuclei

d)Positron emitter

Ans;D

8.Which of the following does not affect position of equilibrium I a chemical reaction?

a)Pressure

b)Catalyst

c)Temperature

d)Concentration.

Ans;B

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9…………acid has three replaceable hydrogen ions

a)Triprotic

b)Monoprotic

c)Diprotic

d)Tetraprotic

Ans;A

10.Find the POH of a water sample with OH concentration of 1.47×10^-6

a)8.83

b)10.9

c)6.80

d)5.17

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Ans;A

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LAUTECH PAST QUESTIONS AND ANSWERS ON CHEMISTRY 101

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CHEMISTRY 101.

Questions;

1.The degree of closeness between replicate set of measurements or analysis is called?

a)Error.

b)Determinate error .

c)Precision.

d)Accuracy.

  • Ans; C

2.Determinate errors can be minimized my any of the following except

a)Running a blank determination.

b)Running parallel determination.

c)Calibration of apparatus.

d)Use of external standard.

Ans; D

3.The error committed by an analyst who claimed not to observe any color in methyl orange indicator during acid-base titration is?

a)Indeterminate

b)Determinate,methodical

c)Determinate,Instrumental

d)Determinate,Personal.

Ans;D

4……………..is the departure of the result from the true value

a)Precision

b)Accuracy

c)Error

d)Bias

Ans; C

5……………Is the trueness or the closeness of the analytical result to the true value

a)Precision

b)Relative error

c)Bias

d)Accuracy

Ans; D

6. The result obtained from the operation 38.91×(6.81-6.730) is y.The value of y is ……

a)3.1128

b)3.11

c)3.113

d)3

Ans; B

7)…………..is called the size of the orbital?

a)Energy level

b)Sub-shell

c)Quantum number

d)shell

Ans; D

8.In the arrangements of electrons in an orbital,electrons are arranged singly before pairing commences.Which law is obeyed?

a)Pauli’s

b)Hund’s

c)Dalton’s

d)Bohr’s model

Ans; B

9.In electro negativity ………..effect is produced.

a)Inducive

b)Inductive effect

c)Ionic

d)Electronic

Ans; B

10……….discovered Neutron

a)Milikan

b)Chadwick

c)Rutherford

d)Newton

Ans; B

The questions above are LAUTECH standard CBT questions.Visit this website for more past questions and answers on

MTH 101

GNS 101

CHM 101

PHY 101

BIO 101

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