CHEM101(GENERAL CHEMISTRY) | Study Mode

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Question 1 CHEM 101

The oxidation state of oxygen in BaO₂ is?

-1

-2

Explanation

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Correct option: D

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Question 2 CHEM 101

What is the oxidation state of Oxygen in KO₂?

-1

-2

-0.5

Explanation

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Correct option: D

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Question 3 CHEM 101

Calculate the atomic weight of boron if its two isotopes have isotopic masses and percentage abundaces of 10.01294(19.60%) and 11.00931(80.40%)

10.81

5.41

21.62

10.52

Explanation

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Correct option: A

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Question 4 CHEM 101

If 0.30mol ofZn is added to excess HCL according to the equation. Zn + 2HCL>ZnCl₂ + H₂. How many particles of Hydrogen are Produced?

1.806 x 10²³

6.02 x 10²³

0.91 x 10²³

1.20 x 10²³

Explanation

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Correct option: A

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Question 5 CHEM 101

Calculate the wavelength of an electron whose mass is 9.11 x 10¯³¹kg travelling at a speed of 4.19 x 10⁶m/s

2.3 x 10¯³³pm

174m

1.74 x 10¯¹⁰m

9.11 x 10pm

Explanation

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Correct option: C

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Question 6 CHEM 101

Calculate the wavelength of the second line in the brackett series of He+ ions. (R= Rydberg constant)

20R/144

9/5R

144/20R

144/5R

Explanation

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Correct option: D

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Question 7 CHEM 101

What is the mass in grams of 22.40dm³ of hydrogen sulphide and nitrogen gases at s.t.p

34g & 28g

17g & 14g

14g & 17g

14g & 34g

Explanation

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Correct option: A

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Question 8 CHEM 101

What is the mass in grams of 22.40dm³ of hydrogen sulphide and ammonia gases at s.t.p

34g and 17g

65g and 18g

17g and 8.5g

65g and 28g

Explanation

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Correct option: A

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Question 9 CHEM 101

The electronic configuration of sulphur in SF₄ is?

1s² 2s² 2p⁶ 3s² 3p⁶ 3d²

1s² 2s² 2p⁶ 3s² 3p⁶

1s² 2s² 2p⁶ 3s⁶ 3d¹

1s² 2s² 2p⁶ 3s² 3p⁵

Explanation

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Correct option: A

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Question 10 CHEM 101

How many subshells are there in the M-shell? How many orbitals are there in the f subshell?

2,4

3,6

3,5

3,7

Explanation

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Correct option: D

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CHEM101(GENERAL CHEMISTRY) | Study Mode

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