Chemistry Test

Question 1
1 / -0

A
3.62 x 10²

B
1.00

C
9.94 x 10^-1

D
2.80 x 10^-3

Question 2
1 / -0

If equal masses of oxygen and nitrogen are placed in separate containers of equal volume at the same temperature, which one of the following statements is true? (MW of N₂=28,O₂=32)

A
Both flasks contain the same number of molecules

B
The pressure in the nitrogen flask is greater than in the oxygen flask

C
More molecules are present in the oxygen flask

D
Molecules in the oxygen flask are moving faster on the average than the ones in the nitrogen flask

Question 3
1 / -0

A proton is accelerated to one-tenth of the velocity of light. If its velocity can be measured with a precision ±1%, then its uncertainty in position is:

A
1.05×10⁻¹³m

B
1.13×10⁻¹³m

C
1.15×10⁻¹³m

D
1.25×10⁻¹³m

Question 4
1 / -0

A sample of pure PCl₅ was introduced into an evacuated vessel at 473 K. After equilibrium was attained, concentration of PCl₅ was found to be 0.5×10⁻¹mol L⁻¹.
Pcl₅(g)⇌PCl₃(g)+Cl2(g),KC=8.3×10⁻³ mol L⁻¹

A
0.08 M

B
0.04 M

C
0.02 M

D
0.02 M

Question 5
1 / -0

Chooe the correct amswer using given codes. Use T if statement is true and F if it is false.
(I) Sulphide ions reacts with Na₂[Fe(CN)₅(NO)] to form a purple coloured compound Na₄[Fe(CN)₅(NOS)]. In the reaction, the oxidation state of iron changes.
(II) Pt(IV) compounds are relatively more stable than Ni(IV) compounds.
(III) The welding of magnesium can be done in the atmosphere of helium.
(IV) LiAIH₄ on hydrolysis will give H₂.

A
FFTT

B
FTTT

C
TFTF

D
TFTT

Question 6
1 / -0

Of the following statements :
(P)C₆H₅N=CH−C₆H₅ is a Schiff's base.
(Q)A dye is obtained by the reaction of aniline and C₆H₅N=NCl.
(R)C₆H₅CH₂NH₂ on treatment with [NaNO₂+HCl] gives diazonium salt.
(S)p−Toluidine on treatment with [HNO₂+HCl] gives diazonium salt.

A
only (P)and(Q) are correct

B
only (P)and(R)(P)and(R) are correct

C
only (R)and(S) are correct

D
(P),(Q)and(S) are correct

Question 7
1 / -0

Chloride samples are prepared for analysis by using NaCl,KCl and NH₄Cl separately or as mixture. What minimum volume of 5% by weight AgNO₃ solution (specific gravity =1.02gmL−1) must be added to a sample of 0.321 g, in order to ensure complete precipitation of chloride in every possible case?

A
20 mL

B
30 mL

C
40 mL

D
50 mL

Question 8
1 / -0

Bronsted-Lowry acid among the following is :

A
[Cu(NH₃)₄]²⁺

B
[FeCl₄]⁻

C
[Fe(H2O)₆]³⁺

D
[Zn(OH)₄]²⁻

Question 9
1 / -0

ZnCO₃ is thermally more stable than MgCO₃ because:

A

Mg(OH)2exhibits only basic properties while Zn(OH)2 is amphoteric

B
polarising action of Zn2+ with 18-electron configuration on the anion is larger than that of Mg2+ with a noble-gas electron configuration and of same size and charge.

C
both (a) and (b) are correct

D
none of the above is correct

Question 10
1 / -0

The IUPAC name of the given compound is:

A
Bicyclo [2.2.2] heptane

B
Bicyclo [2.0.2] octane

C
Bicyclo [2.2.0] nonane

D
Bicyclo [2.2.2] octane

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Chemistry Test ...

Question 1

3.62 x 102

1.00

9.94 x 10-1

2.80 x 10-3

Question 2

Both flasks contain the same number of molecules

The pressure in the nitrogen flask is greater than in the oxygen flask

More molecules are present in the oxygen flask

Molecules in the oxygen flask are moving faster on the average than the ones in the nitrogen flask

Question 3

1.05×10−13m

1.13×10−13m

1.15×10−13m

1.25×10−13m

Question 4

0.08 M

0.04 M

0.02 M

0.02 M

Question 5

FFTT

FTTT

TFTF

TFTT

Question 6

only (P)and(Q) are correct

only (P)and(R)(P)and(R) are correct

only (R)and(S) are correct

(P),(Q)and(S) are correct

Question 7

20 mL

30 mL

40 mL

50 mL

Question 8

[Cu(NH3)4]2+

[FeCl4]−

[Fe(H2O)6]3+

[Zn(OH)4]2−

Question 9

Mg(OH)2exhibits only basic properties while Zn(OH)2 is amphoteric

polarising action of Zn2+ with 18-electron configuration on the anion is larger than that of Mg2+ with a noble-gas electron configuration and of same size and charge.

both (a) and (b) are correct

none of the above is correct

Question 10

Bicyclo [2.2.2] heptane

Bicyclo [2.0.2] octane

Bicyclo [2.2.0] nonane

Bicyclo [2.2.2] octane

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3.62 x 10²

9.94 x 10^-1

2.80 x 10^-3

1.05×10⁻¹³m

1.13×10⁻¹³m

1.15×10⁻¹³m

1.25×10⁻¹³m

[Cu(NH₃)₄]²⁺

[FeCl₄]⁻

[Fe(H2O)₆]³⁺

[Zn(OH)₄]²⁻