Introduction to General Chemistry CHEM101 – Complete Study Guide & Practice Questions

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chemistry chem101 questions and answers.pdf

GENERAL
SECTION:

INSTRUCTION: Answer All




Question 1: According to Avogadro”s hypothesis, the volumes of solids and liquids are considered to be…………………..

0.
A.
B. 1.

C. 2.

D. 273.




Question 2: Calculate the volume of 22.5g of ammonia at S.T.P (N=14, H=1)

A. 530 dm3

560 dm3
B.
C. 720 dm3

D. 550 dm3




Question 3: In the oil drop experiment, Millikan determined the…………….

A. mass of electron.

charge of electron.
B.
C. charge to mass ratio of electron.

D. mass of the proton.




Question 4: Which of the following is a mixture?

Sea water
A.
B. Iron filling

C. Sodium chloride

D. granulated sugar




Question 5: The equation below is an example of……..

235 231 4
92U 90Th + 2He

A. artificial radioactivity.

B l di i i
Exam Preparation: Introduction to general chemistry
Introduction
chem101
Introduction
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questions
chemistry
to general
andchem101
answers.pdf
chemistry
questions
chem101and
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and answers- Practice Questions and Answers

,Concept Review- Introduction to general chemistry
Introduction
chem101
to general
questions
chemistry
and answers
chem101Introduction
questions and
to general
answers.pdf
chemistry chem101 questions and answers.pdf
B. natural radioactivity.

C. nuclear transmutation.

D. nuclear reactor.




Question 6: What quantity of electricity is required to deposit 9.0g of aluminium from its salt?

1F
A.
B. 2F

C. 3F

D. 4F




Question 7: The half-life of Co is 5.26 years. If 50g are left after 15.78 years, how many grams are in the original sample?

400g
A.
B. 350g

C. 500g

D. 550g




Question 8: 100g of Au-198 decays to 6.25g in 10.8days, what is the half-life?

A. 1.5 days

2.67 days
B.
C. 3.5 days

D. 1 day




Question 9: Identify X in the nuclear reaction below;

235 1 148 85
92U + 0n 57La + 35Br + X


31 0 n
A.
B. 311H

C. 30-1e

D. 301e




Question 10: Stable nuclei have n/p ratio between………….

Exam Preparation: Introduction to general chemistry
Introduction
chem101
Introduction
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andchem101
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chemistry
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,Concept Review- Introduction to general chemistry
Introduction
chem101
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chem101Introduction
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chemistry chem101 questions and answers.pdf


A. 2 - 2.5.

B. 1.6 - 2.0.

1 - 1.5.
C.
D. 2.6 – 3.0.




Question 11: α – decay is associated with isotopes that has atomic number………………..

A. Less than 58.

B. Greater than 58.

C. Less than 83.

Greater than 83.
D.




Question 12: two radioactive element P and Q have half-life of 1200s and 3600s respectively, which of the element is more
stable?

A. P

Q
B.
C. Both

D. None of the above




Question 13: Radioactive particles can”t be detected using……………….

A. scintillating counter

B. photographic plate

C. diffusion Cloud Chamber

X-ray diffraction
D.




Question 14: Nuclear fission is used in making………………..

A. hydrogen bomb.

atomic bomb.
B.
C. paints.

D. cables.




Exam Preparation: Introduction to general chemistry
Introduction
chem101
Introduction
to general
questions
chemistry
to general
andchem101
answers.pdf
chemistry
questions
chem101and
questions
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and answers- Practice Questions and Answers

, Concept Review- Introduction to general chemistry
Introduction
chem101
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and answers
chem101Introduction
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chemistry chem101 questions and answers.pdf

Question 15: A modern theory which is used in the calculation of the region where the electron is probably located is known

as………………………..

A. Bohrâ€฀s theory.

Quantum mechanics.
B.
C. Uncertainty principle.

D. Newtonian mechanics.




Question 16: The degenerate orbitals have same values of quantum numbers.

A. principal and magnetic

B. principal and spin

principal and Azimuthal
C.
D. magnetic and Spin




Question 17: Calculate the product of uncertainties of position and velocity of an electron with mass 9.1 x 10-3kg (h = 6.6 x 10-
3kgm2s-1)


A. 5.77 x 10-4m2s-1

5.77 x 10-5m2s-1
B.
C. 5.77 x 10-6m2s-1

D. 5.77 x 10-7m2s-1




Question 18: The set of four quantum numbers for an electron in 3Px1 are……………

n = 3, L = 1, Ml = -1, S = +1/2.
A.
B. n = 3, L = 1, Ml = +1, S = -1/2.

C. n = 3, L = 2, Ml = -1, S = +1/2.

D. n = 4, L = 2, Ml = 0, S = -1/2.




Question 19: Calculate the wavelength of the first line in the Balmer series of the spectrum of Hydrogen atom (RH = 109677
cm-1)

A. 6.565 x 10-5m

6.565 x 10-5cm
B.


Exam Preparation: Introduction to general chemistry
Introduction
chem101
Introduction
to general
questions
chemistry
to general
andchem101
answers.pdf
chemistry
questions
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questions
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