11th Chemistry Important Question Paper 4 | QB365

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11th Chemistry Important Question Paper 4

Published on: 22/09/2018

Important question paper

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Questions:

Multiple Choice Question

35 x 1 = 35

The raw material for Rasching process _________

(a)

chloro benzene

(b)

phenol

(c)

benzene

(d)

anisole

Ethylidene chloride on treatment with aqueous KOH gives ___________

(a)

acetaldehyde

(b)

ehtyleneglycol

(c)

formaldehyde

(d)

glycoxal

Which one of the following is most reactive towards nucleophilic substitution reaction?

(a)

(b)

(c)

(d)

Match the compounds given in Column I with suitable items given in Column II

Column I (Compound)	Column II (Uses)
A. Iodoform	1. Fire extinguisher
B. Carbontetra chloride	2. Insecticide
C. CFC	3. Antiseptic
D. DDT	4. Refrigerants

(a)

A → 2 B → 4 C →1 D →3

(b)

A → 3 B → 2 C → 4 D → 1

(c)

A → 1 B → 2 C →3 D → 4

(d)

A → 3 B → 1 C →4 D → 2

Which of the following reagent is helpful to differentiate ethylene dichloride and ethylidene chloride?

(a)

Zn / methanol

(b)

KOH / ethanol

(c)

aqueous KOH

(d)

ZnCl₂ / Con HCl

The name of C₂F₄Cl₂ is ___________

(a)

Freon – 112

(b)

Freon – 113

(c)

Freon – 114

(d)

Freon – 115

The purity of an organic compound is determined by __________

(a)

Chromatography

(b)

Crystallisation

(c)

melting or boiling point

(d)

both (a) and (c)

Ortho and para-nitro phenol can be separated by _________

(a)

azeotropic distillation

(b)

destructive distillation

(c)

steam distillation

(d)

cannot be separated

The IUPAC name of the compound is ____________

(a)

3 – Ethyl -2– hexene

(b)

3 – Propyl -3– hexene

(c)

4 – Ethyl – 4 – hexene

(d)

3 – Propyl -2-hexene

10.

The IUPAC name of the compound \({ H }_{ 3 }C-\overset { \underset { | }{ { CH }_{ 3 } } }{ \underset { \overset { | }{ { CH }_{ 3 } } }{ C } } -CH=C{ \left( { CH }_{ 3 } \right) }_{ 2 }\) is _____________

(a)

2,4,4 – Trimethylpent -2-ene

(b)

2,4,4 – Trimethylpent -3-ene

(c)

2,2,4 – Trimethylpent -3-ene

(d)

2,2,4 – Trimethylpent -2-ene

11.

IUPAC name of \({ CH }_{ 3 }-\overset { \underset { | }{ H } }{ \underset { \overset { | }{ { C }_{ 2 }{ H }_{ 5 } } }{ C } } -\overset { \underset { | }{ { C }_{ 4 }{ H }_{ 9 } } }{ \underset { \overset { | }{ { CH }_{ 3 } } }{ C } } -{ CH }_{ 3 }\) is ________

(a)

3, 4, 4 – Trimethylheptane

(b)

2 – Ethyl –3, 3– dimethyl heptane

(c)

3, 4, 4 – Trimethyloctane

(d)

2 – Butyl -2 –methyl – 3 – ethyl-butane

12.

Assertion: Helium has the highest value of ionisation energy among all the elements known
Reason: Helium has the highest value of electron affinity among all the elements known

(a)

Both assertion and reason are true and reason is correct explanation for the assertion

(b)

Both assertion and reason are true but the reason is not the correct explanation for the assertion

(c)

Assertion is true and the reason is false

(d)

Both assertion and the reason are false

13.

Match the list-I and list-II using the correct code given below the list.

	List-I		List-II
A.	Alkali metal	1.	ns² np^1-6
B.	Alkaline earth metals	2.	ns¹
C.	d-block elements	3.	ns²
D.	p-block elements	4.	(n-1)d^1-10 ns^0-2

(a)

A	B	C	D
2	3	4	1

(b)

A	B	C	D
3	4	2	1

(c)

A	B	C	D
4	2	3	1

(d)

A	B	C	D
1	4	2	3

14.

Which one of the following is a metal?

(a)

(b)

(c)

(d)

15.

Which period contain 32 elements?

(a)

Period 1

(b)

Period 4

(c)

Period 5

(d)

Period 6

16.

According to modern periodic law, the physical and chemical properties of the elements are periodic functions of their_______

(a)

atomic volume

(b)

atomic numbers

(c)

atotnic weights

(d)

valency

17.

The law of triads is not obeyed by______

(a)

Ca, Sr, Ba

(b)

CI, Br, I

(c)

Li, Na, K

(d)

Be, B, C

18.

Match the list I with List II and select the correct answer using. the code given below the lists.

List I	List II
A.Element with first highest ionization enthalpy	1.Fluorine
B.Element with second highest ionization enthalpy	2.Chlorine
C.Element with highest electron gain enthalpy	3.Sodium
D.Element with highest electronegativity	4.Neon

(a)

A	B	C	D
1	3	2	4

(b)

A	B	C	D
4	3	2	1

(c)

A	B	C	D
3	1	4	2

(d)

A	B	C	D
2	1	4	3

19.

Which of the following property has no unit?

(a)

ionisation energy

(b)

electronegativity

(c)

electron affinity

(d)

atomic radius

20.

"The relative tendency of a bonded atom in a molecule to attract the shared pair of electrons towards itself" is termed as_____

(a)

electron gain enthalpy

(b)

electronegativity

(c)

electron affinity

(d)

ionisation energy

21.

The general electronic configuration of p-block element is _____

(a)

ns^1-2

(b)

np^1-6

(c)

np⁶

(d)

ns² np⁶

22.

The p-block elements comprise of group ____________

(a)

1,2

(b)

13 to 18

(c)

3 to 12

(d)

12 to 18

23.

The general electronic configuration of s-block element is ______

(a)

ns¹

(b)

ns²

(c)

ns¹ and ns²

(d)

ns^1-2

24.

Match the list I with list II and select the correct answer using the code given below the list.

List I		List II
A	Unnilbium/td>	1	Bohrium
B	Unnilhexium	2	Roentgenium
C	Ununnunium	3	Seaborgium
D	Unnilseptium	4	Nobelium

(a)

A	B	C	D
1	2	4	3

(b)

A	B	C	D
3	1	4	2

(c)

A	B	C	D
4	3	2	1

(d)

A	B	C	D
4	3	1	2

25.

Modern periodic law is ____________

(a)

The physical and chemical properties of the elements are periodic functions of their atomic numbers.

(b)

The physical and chemical properties of the elements depend upon the energy of the electrons.

(c)

The physical and chemical properties of the elements depend upon atomic weight.

(d)

None of these

26.

The first transition series is from _____ to _____

(a)

Sc to Zn

(b)

Hf to Hg

(c)

Y to Cd

(d)

Ac to Lr

27.

The electronic configuration of nitrogen is _____

(a)

Is²2s²2p³

(b)

Is²2s² 2P_x¹2p_y¹2P₂¹

(c)

Is²2s¹2p⁴

(d)

both (a) and (b)

28.

Consider the following statements according to modern periodic table.
(i) Modern periodic table contains 18 vertical columns and 7 horizontal rows.
(ii) The elements after uranium are called transuranium elements
(iii) The 17th group elements are called chalcogens
(iv) The elements of Groups 13 to 18 are called p-block elements.
which of the following statement(s) given above is/are correct.

(a)

(i), (iii) & (iv)

(b)

(i), (ii) & (iii)

(c)

(i), (ii) & (iv)

(d)

all the 4 statements

29.

Which of the following statement (s) about the Modern Periodic Table is are incorrect
i. The elements in the Modern Periodic Table are arranged on the basis of their decreasing atomic number.
ii. The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic masses.
iii. Isotopes are placed in adjoining group (s) in the Periodic Table.
iv. The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic number.

(a)

(i) only

(b)

(i), (ii) and (iii)

(c)

(i), (ii) and (iv)

(d)

(iv) only

30.

The first list of 23 chemical elements was published by _____ in the year 1789.

(a)

Berzelius

(b)

Dobereiner

(c)

Lavoisier

(d)

John Dalton

31.

Period of an element is represented by _____ quantum number

(a)

Principal

(b)

Azimuthal

(c)

Magnetic

(d)

Spin

32.

Which of the following pairs of elements exhibit diagonal relationship?

(a)

Be and Mg

(b)

Li and Mg

(c)

Be and B

(d)

Be and Al

33.

How does electron affinity change when we move from left to right in a period in the periodic table?

(a)

Generally increases

(b)

Generally decreases

(c)

Remains unchanged

(d)

First increases and then decreases

34.

The group of elements in which the differentiating electron enters the anti penultimate shell of atoms are called ___________

(a)

p-block elements

(b)

d-block elements

(c)

s-block elements

(d)

f-block elements

35.

The electronic configuration of the elements A and B are 1s², 2s ²,2p⁶,3s² and 1s², 2s²,2p⁵ respectively. The formula of the ionic compound that can be formed between these elements is ___________

(a)

(b)

AB₂

(c)

A₂B

(d)

none of the above