Chemistry Test

Result

Chemistry Test - 15

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Identify the reactant X and product Y in the given reaction

$C H_{3} - C O - C H_{3} + X \to {(C H_{3})}_{3} C - O M g C l \overset{h y d r o l y s i s}{\to} Y + M g (O H) C l$

A
X = MgCl₂; Y = CH3CH = CH2

B
X = CH₃MgCl; Y = C₂H₅COCH₃

C
X = CH₃MgCl; Y = (CH₃)₃C-OH

D
X = C₂H₅MgCl; Y = (CH₃)₃C-OH

Solution
Question 2
1 / -0

Consider the ions K+, S2-, Cl-and Ca2+. The radii of these ionic species follow which of the following orders?

A
Ca2+> K+> Cl-> S2-

B
Cl-> S2-> K+> Ca2+

C
Ca2+> Cl-> K > S2-

D
S2-> Cl-> K+> Ca2+

Solution

As the nuclear charge increases, the ionic radii decrease. So, the correct order of radii is S2-> Cl-> K+> Ca2+.
Question 3
1 / -0

Which of the following substances acts as an oxidising as well as a reducing agent?

A
Na₂O

B
SnCl₂

C
Na₂O₂

D
NaNO₂

Solution

NaNO₂ acts as an oxidising as well as reducing agent.
Question 4
1 / -0

Which of the following elements is present in teflon?

A
C

B
Cl

C
F

D
Br

Solution

Fluorine is present in teflon. Teflon has the following structure:
Question 5
1 / -0

The respective numbers of α and β particles, emitted during the transformation of 232/90 TH to 208/82 PB are

A
3, 6

B
6, 3

C
4, 6

D
6, 4

Solution
Question 6
1 / -0

Which of the following is the correct order of polarising powers of cations?

A
K+< Be2+< Mg2+< Ca2+

B
K+< Ca2+< Mg2+< Be2+

C
Ca2+< Mg2+< Be2+< K+

D
Be2+< Mg2+< Ca2++

Solution

The polarising power of cations depends upon the charge-to-size ratio. The higher the charge-to-size ratio, the greater is the polarising power. The size of divalent ions follows the order: Be2+, Mg2+, Ca2+. Therefore, the correct order of polarising powers is K+< Ca2+< Mg2+< Be2+
Question 7
1 / -0

Terylene is a polyester of

A
hexamethylene diamine and adipic acid

B
vinyl chloride and formaldehyde

C
melamine and formaldehyde

D
ethylene glycol and terephthalic acid

Solution

Terylene is a polymer (a chain of repeating units) where the individual units are held together by ester linkages.
Question 8
1 / -0

Which of the following species does not exist?

A
[SnCl₆]³⁻

B
[GeCl₆]²⁻

C
[SiCl₆]²⁻

D
[CCl₆]²⁻

Solution

Carbon atom cannot expand its valency shell due to non-availability of 2dsubshell, so [CCl6]2−does not exist.
Question 9
1 / -0

When H2S gas is bubbled through As2S3precipitate in water, it gives

A
neutral solution

B
solid-liquid solution

C
solid emulsion

D
fat in solvent

Solution

A solid emulsion is formed when H2S gas is bubbled through As2S3precipitate in water.
Question 10
1 / -0

Molar heat capacity of water in equilibrium with ice at constant pressure is

A
zero

B
40.54 kJ K–1mol–1

C
75.48 kJ K–1mol–1

D
infinity

Solution

By definition, Cp = (dq/dT)p. When water is in equilibrium with ice, heat given or released does not change its temperature. Hence, Cp = dq /zero =∞

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Chemistry Test - 15

Result

Chemistry Test - 15

Score

-

Rank

-

SHARING IS CARING

Question 1

X = MgCl2; Y = CH3CH = CH2

X = CH3MgCl; Y = C2H5COCH3

X = CH3MgCl; Y = (CH3)3C-OH

X = C2H5MgCl; Y = (CH3)3C-OH

Solution

Question 2

Ca2+> K+> Cl-> S2-

Cl-> S2-> K+> Ca2+

Ca2+> Cl-> K > S2-

S2-> Cl-> K+> Ca2+

Solution

Question 3

Na2O

SnCl2

Na2O2

NaNO2

Solution

Question 4

C

Cl

F

Br

Solution

Question 5

3, 6

6, 3

4, 6

6, 4

Solution

Question 6

K+< Be2+< Mg2+< Ca2+

K+< Ca2+< Mg2+< Be2+

Ca2+< Mg2+< Be2+< K+

Be2+< Mg2+< Ca2++

Solution

Question 7

hexamethylene diamine and adipic acid

vinyl chloride and formaldehyde

melamine and formaldehyde

ethylene glycol and terephthalic acid

Solution

Question 8

[SnCl6]3−

[GeCl6]2−

[SiCl6]2−

[CCl6]2−

Solution

Question 9

neutral solution

solid-liquid solution

solid emulsion

fat in solvent

Solution

Question 10

zero

40.54 kJ K–1mol–1

75.48 kJ K–1mol–1

infinity

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.

X = MgCl₂; Y = CH3CH = CH2

X = CH₃MgCl; Y = C₂H₅COCH₃

X = CH₃MgCl; Y = (CH₃)₃C-OH

X = C₂H₅MgCl; Y = (CH₃)₃C-OH

Na₂O

SnCl₂

Na₂O₂

NaNO₂

[SnCl₆]³⁻

[GeCl₆]²⁻

[SiCl₆]²⁻

[CCl₆]²⁻