Chemistry Test

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Chemistry Test - 7

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Weekly Quiz Competition

Question 1
1 / -0

Oxidation states of the metal in the minerals haematite and magnetite, respectively, are

A

II in haematite and II, III in magnetite

B

III in haematite and II, III in magnetite

C

II, III in haematite and III in magnetite

D

II, III in haematite and II in magnetite
Question 2
1 / -0

A

Option D

B

Option C

C

Option B

D

Option A
Question 3
1 / -0

The reaction

A

Gatterman - Koch reaction

B

Williamson continuous etherification process

C

Etard reaction

D

Williamson synthesis
Question 4
1 / -0

The species which by definition has ZERO standard molar enthalpy of formation at 298 K is

A

H2O (g)

B

CH4 (g)

C

Cl2 (g)

D

Br2 (g)
Question 5
1 / -0

Extraction of metal from the ore cassiterite involves

A

carbon reduction of an oxide ore

B

All of these

C

removal of copper impurity

D

removal of iron impurity
Question 6
1 / -0

Based on VSEPR theory, the number of 90 degree F−Br−F angles in BrF5 is

A

0

B

1

C

2

D

3
Question 7
1 / -0

When a metal rod M is dipped into an aqueous colourless concentrated solution of compound N, the solution turns light blue. Addition of aqueous NaCl to the blue solution gives a white precipitate O. Addition of aqueous NH3 dissolves O and gives an intense blue solution. The compound N is

A

Zn(NO3)2

B

Pb(NO3)2

C

AgNO3

D

Al(NO3)3
Question 8
1 / -0

A student performs a titration with different burettes and finds titre values of 25.2 mL, 25.25 mL and 25.0 mL. The number of significant figures in the average titre value is

A

4

B

3

C

5

D

6
Question 9
1 / -0

Amongst the following, the total number of compounds whose aqueous solution turns red litmus paper blue is

A

2

B

4

C

5

D

3
Question 10
1 / -0

Among the following compounds, the most acidic is

A

o-hydroxybenzoic acid

B

p-nitrophenol

C

p-hydroxybenzoic acid

D

p-toluic acid

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Chemistry Test - 7

Result

Chemistry Test - 7

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SHARING IS CARING

Question 1

II in haematite and II, III in magnetite

III in haematite and II, III in magnetite

II, III in haematite and III in magnetite

II, III in haematite and II in magnetite

Question 2

Option D

Option C

Option B

Option A

Question 3

Gatterman - Koch reaction

Williamson continuous etherification process

Etard reaction

Williamson synthesis

Question 4

H2O (g)

CH4 (g)

Cl2 (g)

Br2 (g)

Question 5

carbon reduction of an oxide ore

All of these

removal of copper impurity

removal of iron impurity

Question 6

0

1

2

3

Question 7

Zn(NO3)2

Pb(NO3)2

AgNO3

Al(NO3)3

Question 8

4

3

5

6

Question 9

2

4

5

3

Question 10

o-hydroxybenzoic acid

p-nitrophenol

p-hydroxybenzoic acid

p-toluic acid

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My Perfomance

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