Chemistry Test

Question 1
1 / -0

If the ionization enthalpy and electron gain enthalpy of an element are $275$ and $86$ $kcal$ ${mol}^{- 1}$ respectively, then the electronegativity of the element on the Pauling scale is:

A
$2.8$

B
$0.0$

C
$4.0$

D
$2.6$

Question 2
1 / -0

In ___________, a reaction product is itself a catalyst for that reaction leading to positive feedback.

A
Autocatalysis

B
Catalysis

C
Pressure jump

D
Fast reactions

Question 3
1 / -0

The reduction in atomic size with increase in atomic number is a characteristic of elements of:

A
d-block

B
f-block

C
Radioactive series

D
High atomic masses

Question 4
1 / -0

_______ group elements are known as chalcogens.

A
VIA

B
VA

C
Zero

D
None of these

Question 5
1 / -0

Among the following the state function(s) is (are):

(i) Internal energy

(ii) Irreversible expansion work

(iii) Reversible expansion work

(iv) Molar enthalpy

A
(i) and (iv)

B
(ii) and (iii)

C
(i), (ii) and (iii)

D
(i) only

Question 6
1 / -0

The IUPAC name of $C H_{3} C O C H {(C H_{3})}_{2}$ is:

A
Isopropyl methyl ketone

B
$4$ -methylisopropyl ketone

C
$2$ -methyl- $3$ -butanone

D
$3$ -methyl- $2$ -butanone

Question 7
1 / -0

The bond length between hybridised carbon atom and other carbon atom is minimum in:

A
Propane

B
Butane

C
Propene

D
Propyne

Question 8
1 / -0

Which of the following is a tridentate ligand?

A
$E D T A^{4 -}$

B
$(C O O)_{2}^{2 -}$

C
Dien

D
$N O_{2}^{-}$

Question 9
1 / -0

$R - C H = C R O^{-} + C H_{2} - N^{+} R_{2} \to N R_{2} - C H_{2} - C H R - C R O$

The given reaction in an example of:

A
Arndt-Eistert homologation

B
Mannich reaction

C
Michael addition

D
Chichibabin amination reaction

Question 10
1 / -0

A first order reaction has the rate constant, $k = 4.6 \times 10^{- 3} s^{- 1}$ . The number of correct statement/s from the following is/are____________.

Given : $\log 3 = 0.48$

A. Reaction completes in $1000 s$ .

B. The reaction has a half-life of $500 s$ .

C. The time required for $10 %$ completion is 25 times the time required for $90 %$ completion.

D. The degree of dissociation is equal to $(1 - e^{- kt})$ .

E. The rate and the rate constant have the same unit.

A
2

B
1

C
4

D
3

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Chemistry Test ...

Question 1

2.8

0.0

4.0

2.6

Question 2

Autocatalysis

Catalysis

Pressure jump

Fast reactions

Question 3

d-block

f-block

Radioactive series

High atomic masses

Question 4

VIA

VA

Zero

None of these

Question 5

(i) and (iv)

(ii) and (iii)

(i), (ii) and (iii)

(i) only

Question 6

Isopropyl methyl ketone

4-methylisopropyl ketone

2-methyl-3-butanone

3-methyl-2-butanone

Question 7

Propane

Butane

Propene

Propyne

Question 8

EDTA4−

(COO)22−

Dien

NO2−

Question 9

Arndt-Eistert homologation

Mannich reaction

Michael addition

Chichibabin amination reaction

Question 10

2

1

4

3

User

Question Analysis

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$2.8$

$0.0$

$4.0$

$2.6$

$4$ -methylisopropyl ketone

$2$ -methyl- $3$ -butanone

$3$ -methyl- $2$ -butanone

$E D T A^{4 -}$

$(C O O)_{2}^{2 -}$

$N O_{2}^{-}$