Chemistry Test 93

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Chemistry Test 93

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following aqueous solutions will be electrically neutral ?

A
In which 50 Ba⁺² ions and 100 Br^– ions are present

B
In which 50 Ba⁺² ions and 50 Cl^– ions are present

C
In which 50 Na⁺, 25 SO₄^–2 and 25 Cl^– ions are present

D
In which 150 Al⁺³ ions and 100 PO₄^–3 ions are present
Question 2
4 / -1

The specific conductivity of N/10 KCl solution is 0.0212 ohm^–1 cm^–1 and the resistance of cell containing this solution is 55 ohm. The cell constant is :

A
3.324 cm^–1

B
2.173 cm^–1

C
1.166 cm^–1

D
4.616 cm^–1
Question 3
4 / -1

Which of the following complex salt has maximum conductance in solution :-

A
CrCl₃ . 5NH₃

B
CrCl₃ . 6NH₃

C
CrCl₃ . 4NH₃

D
CrCl₃ . 3NH₃
Question 4
4 / -1

A graph was plotted between molar conductivity of various electrolytes (NaCl, HCl and NH₄OH) and (in molL^–1). Correct answer is :-

A
I(NaCl), II(HCl), III(NH₄OH)

B
I(HCl), II(NaCl), III(NH₄OH)

C
I(NH₄OH), II(NaCl), III(HCl)

D
I(NH₄OH), II(HCl), III(NaCl)
Question 5
4 / -1

The molar conductance of acetic acid at infinite dilution, if Λ^ο for CH₃COONa, NaCl and HCl are 91.0, 126.5 and 426.2 S cm² mol^–1 respectively :-

A
517.2

B
552.7

C
390.7

D
217.5
Question 6
4 / -1

If limiting equivalent conductance of NH₄Cl, NaOH and NaCl are a, b and c ohm^–1 m² g eq^–1 respectively then what will be of NH₄OH.

A
a + b – c

B
a – b + c

C
a – b – c

D
Question 7
4 / -1

What will be the molar conductivity at infinite dilution for NH₄OH if at infinite dilution the molar conductivites of Ba(OH)₂, BaCl₂ and NH₄Cl are 523.28, 280.0 and 129.8 ohm^–1 cm² mol^–1 respectively. :-

A
502.88 ohm^–1cm²mol^–1

B
373.68 ohm^–1cm²mol^–1

C
251.44 ohm^–1cm²mol^–1

D
226.96 ohm^–1cm²mol^–1
Question 8
4 / -1

The electrode potentials for
Cu²⁺(aq) + e^– → Cu⁺(aq)
and Cu⁺(aq) + e^– → Cu(s)
are +0.15 V and +0.50 V respectively. The value of will be :-

A
0.500 V

B
0.325 V

C
0.650 V

D
0.150 V
Question 9
4 / -1

The ionization constant of a weak acid (HX) is 9 × 10^–6 while the equivalent conductance of its 0.01 M solution is 30 S cm² eq^–1. The equivalent conductance of the electrolyte at infinite dilution will be :-

A
100 S cm² eq^–1

B
30 S cm² eq^–1

C
3 S cm² eq^–1

D
1000 S cm² eq^–1

Solution
Question 10
4 / -1

E° for Cl₂(g) + 2e^– 2Cl^–(aq) is 1.36 V,
E° for Cl^–(g) 1/2Cl₂(g) + e^– is :

A
1.36 V

B
–1.36 V

C
–0.68 V

D
0.68 V

Solution

E° = –1.36 V

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Chemistry Test 93

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Chemistry Test 93

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Question 1

In which 50 Ba+2 ions and 100 Br– ions are present

In which 50 Ba+2 ions and 50 Cl– ions are present

In which 50 Na+, 25 SO4–2 and 25 Cl– ions are present

In which 150 Al+3 ions and 100 PO4–3 ions are present

Question 2

3.324 cm–1

2.173 cm–1

1.166 cm–1

4.616 cm–1

Question 3

CrCl3 . 5NH3

CrCl3 . 6NH3

CrCl3 . 4NH3

CrCl3 . 3NH3

Question 4

I(NaCl), II(HCl), III(NH4OH)

I(HCl), II(NaCl), III(NH4OH)

I(NH4OH), II(NaCl), III(HCl)

I(NH4OH), II(HCl), III(NaCl)

Question 5

517.2

552.7

390.7

217.5

Question 6

a + b – c

a – b + c

a – b – c

Question 7

502.88 ohm–1cm2mol–1

373.68 ohm–1cm2mol–1

251.44 ohm–1cm2mol–1

226.96 ohm–1cm2mol–1

Question 8

0.500 V

0.325 V

0.650 V

0.150 V

Question 9

100 S cm2 eq–1

30 S cm2 eq–1

3 S cm2 eq–1

1000 S cm2 eq–1

Solution

Question 10

1.36 V

–1.36 V

–0.68 V

0.68 V

Solution

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In which 50 Ba⁺² ions and 100 Br^– ions are present

In which 50 Ba⁺² ions and 50 Cl^– ions are present

In which 50 Na⁺, 25 SO₄^–2 and 25 Cl^– ions are present

In which 150 Al⁺³ ions and 100 PO₄^–3 ions are present

3.324 cm^–1

2.173 cm^–1

1.166 cm^–1

4.616 cm^–1

CrCl₃ . 5NH₃

CrCl₃ . 6NH₃

CrCl₃ . 4NH₃

CrCl₃ . 3NH₃

I(NaCl), II(HCl), III(NH₄OH)

I(HCl), II(NaCl), III(NH₄OH)

I(NH₄OH), II(NaCl), III(HCl)

I(NH₄OH), II(HCl), III(NaCl)

502.88 ohm^–1cm²mol^–1

373.68 ohm^–1cm²mol^–1

251.44 ohm^–1cm²mol^–1

226.96 ohm^–1cm²mol^–1

100 S cm² eq^–1

30 S cm² eq^–1

3 S cm² eq^–1

1000 S cm² eq^–1