Chemistry Test 112

Result

Chemistry Test 112

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Question 1/10
4 / -1

Select the INCORRECT statement among given :

Correct

Wrong

Skipped
A
All bond lengths are equal in (X).

Correct

Wrong

Skipped
B
PH₃ is also formed along with (Y).

Correct

Wrong

Skipped
C
SO₂ is only byproduct formed with (X) in reaction of P₄ with SOCl₂.

Correct

Wrong

Skipped
D
Oxidation state of phosphorus in oxyacid of phosphorus (Y) is +5.

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Solutions
Question 2/10
4 / -1

Which compound is expected to have highest pKa value ?

Correct

Wrong

Skipped
A
CH₃CH₂COOH

Correct

Wrong

Skipped
B

Correct

Wrong

Skipped
C
CF₃–CH₂–COOH

Correct

Wrong

Skipped
D
CH₃–CF₂–COOH
Question 3/10
4 / -1

A photon of energy hν is absorbed by a free electron of a metal having work function w < hν. Then:

Correct

Wrong

Skipped
A
The electron is sure to come out.

Correct

Wrong

Skipped
B
The electron is sure to come out with a kinetic energy (hν - w).

Correct

Wrong

Skipped
C
Either the electron does not come out or it comes with a kinetic energy (hν - w).

Correct

Wrong

Skipped
D
It may come out with a kinetic energy less than (hν - w).

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Solutions

Informational
Question 4/10
4 / -1

Correct statement regarding orthoboric acid is :

Correct

Wrong

Skipped
A
It is a Lewis acid whose pKa is –1.

Correct

Wrong

Skipped
B
It is a triprotic, weak Bronsted acid.

Correct

Wrong

Skipped
C
There exist H-bonds in between layers in its crystalline form.

Correct

Wrong

Skipped
D
Cis-diols can be used to increase acidic strength in its aq. solution.

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Solutions
Question 5/10
4 / -1

Which of the following amine forms N-nitrosoamine upon treatment with NaNO₂ & HCl ?

Correct

Wrong

Skipped
A

Correct

Wrong

Skipped
B
Aniline

Correct

Wrong

Skipped
C

Correct

Wrong

Skipped
D

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Solutions

2° amines form N-nitrosoamine upon treatment with NaNO₂ & HCl.
Question 6/10
4 / -1

The compression factor (compressibility factor) for one mole of a vander Waals gas at 0° C and 100 atmosphere pressure is found to be 0.5. Assuming that the volume of a gas molecule is negligible, calculate the vander waals constant 'a'.

Correct

Wrong

Skipped
A
1.2544 atm L² mol^–2

Correct

Wrong

Skipped
B
125.44 atm L² mol^–2

Correct

Wrong

Skipped
C
12.544 atm L² mol^–2

Correct

Wrong

Skipped
D
2.50 atm L² mol^–2

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Solutions
Question 7/10
4 / -1

Co-ordinated as well as hydrogen bonded water are present in :

Correct

Wrong

Skipped
A
BaCl₂.2H₂O

Correct

Wrong

Skipped
B
[Cr(H₂O)₆]Cl₃

Correct

Wrong

Skipped
C
CuSO₄.5H₂O

Correct

Wrong

Skipped
D
All of these

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Solutions

BaCl₂.2H₂O : interstitial water

[Cr(H₂O)₆]Cl₃ : co-ordinated water
Question 8/10
4 / -1

In the reaction

Maximum extent of hofmann alkene product will be obtained when X is-

Correct

Wrong

Skipped
A
1

Correct

Wrong

Skipped
B
Br

Correct

Wrong

Skipped
C
Cl

Correct

Wrong

Skipped
D
F
Question 9/10
4 / -1

When 20 g of naphtholic acid (C₁₁H₈O₂) is dissolved in 50 g of benzene (K_f = 1.72 K kg mol^–1), a freezing point depression of 2 K is observed.

The van’t Hoff factor (i) is

Correct

Wrong

Skipped
A
0.5

Correct

Wrong

Skipped
B
1

Correct

Wrong

Skipped
C
2

Correct

Wrong

Skipped
D
3

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Solutions
Question 10/10
4 / -1

The correct properties of dilute solution of sodium metal in excess of aq. NH₃ is :

Correct

Wrong

Skipped
A
Paramagnetic, blue coloured

Correct

Wrong

Skipped
B
Diamagnetic, bronze coloured

Correct

Wrong

Skipped
C
Diamagnetic, colourless

Correct

Wrong

Skipped
D
Paramagnetic, colourless

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Solutions

Question 1/10

All bond lengths are equal in (X).

PH3 is also formed along with (Y).

SO2 is only byproduct formed with (X) in reaction of P4 with SOCl2.

Oxidation state of phosphorus in oxyacid of phosphorus (Y) is +5.

Question 2/10

CH3CH2COOH

CF3–CH2–COOH

CH3–CF2–COOH

Question 3/10

The electron is sure to come out.

The electron is sure to come out with a kinetic energy (hν - w).

Either the electron does not come out or it comes with a kinetic energy (hν - w).

It may come out with a kinetic energy less than (hν - w).

Question 4/10

It is a Lewis acid whose pKa is –1.

It is a triprotic, weak Bronsted acid.

There exist H-bonds in between layers in its crystalline form.

Cis-diols can be used to increase acidic strength in its aq. solution.

Question 5/10

Aniline

Question 6/10

1.2544 atm L2 mol–2

125.44 atm L2 mol–2

12.544 atm L2 mol–2

2.50 atm L2 mol–2

Question 7/10

BaCl2.2H2O

[Cr(H2O)6]Cl3

CuSO4.5H2O

All of these

Question 8/10

1

Br

Cl

F

Question 9/10

0.5

1

2

3

Question 10/10

Paramagnetic, blue coloured

Diamagnetic, bronze coloured

Diamagnetic, colourless

Paramagnetic, colourless

PH₃ is also formed along with (Y).

SO₂ is only byproduct formed with (X) in reaction of P₄ with SOCl₂.

CH₃CH₂COOH

CF₃–CH₂–COOH

CH₃–CF₂–COOH

1.2544 atm L² mol^–2

125.44 atm L² mol^–2

12.544 atm L² mol^–2

2.50 atm L² mol^–2

BaCl₂.2H₂O

[Cr(H₂O)₆]Cl₃

CuSO₄.5H₂O