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Basic Concepts Of Chemistry And Chemical Calculations & Quantum Mechanical Model Of Atom Important One Mark Question Paper In 11th Chemistry | QB365

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Basic Concepts Of Chemistry And Chemical Calculations & Quantum Mechanical Model Of Atom Important One Mark Question Paper In 11th Chemistry

Published on: 30/09/2018

Important 1mark -chapter 1,2

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Questions:

Multiple Choice Question

48 x 1 = 48

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

	List-I (Empirical Formula)		List-II (Molecular formula)
A	Benzene - CH	1	H₂O₂
B	Fructose - CH₂O	2	C₂H₂
C	Acetylene - CH	3	C₆H₆
D	Hydrogen peroxide-OH	4	C₆H₁₂O₆

(a)

A	B	C	D
4	2	3	1

(b)

A	B	C	D
3	4	2	1

(c)

A	B	C	D
4	1	2	3

(d)

A	B	C	D
1	4	3	2

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

	List-I (acids		List-II (Basicity)
A	HCl	1	3
B	H₂SO₄	2	4
C	H₄P₂O₇	3	2
D	H₃PO₄	4	1

(a)

A	B	C	D
4	3	2	1

(b)

A	B	C	D
3	4	1	2

(c)

A	B	C	D
4	1	3	2

(d)

A	B	C	D
4	1	3	2

The oxidation number of carbon in CH3 - CH₂OH is _______________.

(a)

(b)

-2

(c)

(d)

The mass of an atom of nitrogen is _______________.

(a)

\(\frac { 14 }{ 6.023\times { 10 }^{ 23 } } \)

(b)

\(\frac { 28 }{ 6.023\times { 10 }^{ 23 } } \)

(c)

\(\frac { 1 }{ 6.023\times { 10 }^{ 23 } } \)

(d)

14 amu

The number of moles of H, in 2.24 litre of hydrogen gas at STP is ____________

(a)

(b)

0.1

(c)

0.01

(d)

0.001

In the reaction 2AuCl₃ + 3SnCl₂ \(\rightarrow\) 2Au + 3SnCl₄ which is an oxidising agent?

(a)

AuCl₃

(b)

(c)

SnCl₂

(d)

Both AuCl₃ and SnCl₂

How much volume of CO₂ is produced when 50 g of CaCO₃ is heated strongly?

(a)

2.24 x 10^-2m³

(b)

22.4 L

(c)

11.2L

(d)

22400 Cm³

Which of the following is a mono-atomic molecule?

(a)

Hydrogen

(b)

Oxygen

(c)

Sodium

(d)

Ozone

When l = 0, the number of electrons that can be accommodated in the subshell is_______________

(a)

(b)

(c)

(d)

10.

The crystal used in Davison and Germer experiment is__________

(a)

nickel

(b)

zinc sulphide

(c)

gold foil

(d)

NaCI

11.

Who proposed the dual nature of light to all forms of matter?

(a)

John Dalton

(b)

Neils Bohr

(c)

Albert Einstein

(d)

J. J. Thomson

12.

The value of n, I, m and s of 8^th electron in an oxygen atom are respectively____________.

(a)

\(1,0,0,+\frac{1}{2}\)

(b)

\(2,1,+1,-\frac{1}{2}\)

(c)

\(2,1,-1,-\frac{1}{2}\)

(d)

\(2,1,0,+\frac{1}{2}\)

13.

How many orbitals are possible in 3^rd energy level?

(a)

(b)

(c)

(d)

14.

How many equivalents of sodium sulphate is formed when sulphuric acid is completely neutralized by a base NaOH __________.

(a)

0.2

(b)

(c)

0.1

(d)

15.

For a principle quantum number n = 4, the total number of orbitals having l = 3 is:

(a)

(b)

(c)

(d)

16.

Assertion: Number of radial and angular nodes for 3p orbital are 1, 1 respectively.
Reason: Number of radial and angular nodes depends only on principal quantum number.

(a)

both assertion and reason are true and reason is the correct explanation of assertion.

(b)

both assertion and reason are true but reason is not the correct explanation of assertion.

(c)

assertion is true but reason is false

(d)

both assertion and reason are false

17.

Assertion: The spectrum of He⁺is expected to be similar to that of hydrogen
Reason: He⁺ is also one electron system.

(a)

If both assertion and reason are true and reason is the correct explanation of assertion.

(b)

If both assertion and reason are reason are true but reason is not the correct explanation of assertion

(c)

If assertion is true but reason is false

(d)

If both assertion and reason are false

18.

How many moles of magnesium phosphate Mg₃(PO₄)₂ Will Contain 0.25 moles of oxygen atoms?

(a)

0.02

(b)

3.125 x 10^-2

(c)

1.25 x 10^-2

(d)

2.5 x 10^-2

19.

If a beaker holds 576g of water, what will be the gram molecules of water in that beaker?

(a)

23 gram molecule

(b)

23%

(c)

32%

(d)

32 gram molecule

20.

1 amu = _____________.

(a)

1.6605\(\times\)10^-25 kg

(b)

1.6605\(\times\)10^-26 kg

(c)

1.6605\(\times\)10^-27 kg

(d)

1.6605\(\times\)10^-28 kg

21.

The wavelength associated with an electron moving with velocity 10¹⁰ ms^-1 is ___________

(a)

6.62 \(\times\) 10^-10m

(b)

7.28 \(\times\) 10^-14m

(c)

3.69 \(\times\) 10^-12m

(d)

4.92 \(\times\) 10^-11m

22.

The de-Broglie wavelength of a particle with mass 19 and velocity 100 m/s is __________

(a)

6.63 \(\times\) 10^-35 m

(b)

6.63 \(\times\) 10^-34 m

(c)

6.63 \(\times\) 10^-33 m

(d)

6.65 \(\times\) 10^-35 m

23.

What is the maximum number of orbitals that can be identified with the following quantum numbers? n = 3,l = 1,m₁= 0

(a)

(b)

(c)

(d)

24.

The value of Bohr radius for hydrogen atom is ___________

(a)

0.529 \(\times\) 10^-8 cm

(b)

0.529 \(\times\) 10^-10 cm

(c)

0.529 \(\times\) 10^-12 cm

(d)

0.529 \(\times\) 10^-12 cm

25.

Almost the entire mass of an atom is concentrated in the _______

(a)

proton

(b)

electrons

(c)

neutrons

(d)

nucleus

26.

How many neutrons and protons respectively are present in the ₆C¹³ nuclei?

(a)

6, 13

(b)

6, 7

(c)

13,6

(d)

7,6

27.

Consider the following statements
1. \(\lambda\) = h / mv is valid only when the particle travels at speed much less than the speed of light.
2. Einstein's mass-energy relationship is E = mc²
3. The angular momentum (mvr) ofthe electron must be equal to an integral multiple of h/4\(\pi\) . Which of the following statements) given above is/ are correct?

(a)

1&3

(b)

Only 1

(c)

1 & 2

(d)

1, 2 & 3

28.

Which of the following does not represent the mathematical expression for the Heisenberg uncertainty principle?

(a)

\(\triangle x.\triangle p\ge \frac { h }{ 4\pi } \)

(b)

\(\triangle x.\triangle v\ge \frac { h }{ 4\pi m } \)

(c)

\(\triangle E.\triangle t\ge \frac { h }{ 4\pi } \)

(d)

\(\triangle E.\triangle x\ge \frac { h }{ 4\pi } \)

29.

Which of the following compound(s) has /have a percentage of carbon same as that in ethylene (C₂H₄)?

(a)

propene

(b)

ethyne

(c)

benzene

(d)

ethane

30.

Two 22.4 litre containers A and B contains 8 g of O₂ and 8 g of SO₂ respectively at 273 K and 1 atm pressure, then ______.

(a)

Number of molecules in A and B are same

(b)

Number of molecules in B is more than that in A.

(c)

The ratio between the number of molecules in A= to number of molecules in B is 2:1

(d)

Number of molecules in B is three times greater than the number of molecules in A

31.

The correct increasing order of the oxidation state of sulphur in the anions \({ SO }_{ 4 }^{ 2- },{ SO }_{ 3 }^{ 2- }{ , }{ { S }_{ 2 }{ O } }_{ 4 }^{ 2- },{ S }_{ 2 }{ O }_{ 6 }^{ 2- }\) is _________.

(a)

\({ SO }_{ 3 }^{ 2- }<{ SO }_{ 4 }^{ 2- }<{ { S }_{ 2 }{ O } }_{ 4 }^{ 2- }<{ S }_{ 2 }{ O }_{ 6 }^{ 2- }\)

(b)

\({ SO }_{ 4 }^{ 2- }<{ SO }_{ 4 }^{ 2- }<{ S }_{ 2 }{ O }_{ 6 }^{ 2- }<{ SO }_{ 3 }^{ 2- }\)

(c)

\({ { S }_{ 2 }{ O } }_{ 4 }^{ 2- }<{ SO }_{ 3 }^{ 2- }<{ S }_{ 2 }{ O }_{ 6 }^{ 2- }<{ SO }_{ 4 }^{ 2- }\)

(d)

\({ S }_{ 2 }{ O }_{ 6 }^{ 2- }<{ SO }_{ 4 }^{ 2- }<{ SO }_{ 4 }^{ 2- }<{ SO }_{ 3 }^{ 2- }\)

32.

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

List-I		List-II
A	Cr₂O₇^2-	1	+5
B	MnO₄^-	2	+6
C	VO₃^-	3	+3
D	FeF₆³⁺	4	+7

(a)

A	B	C	D
3	1	4	2

(b)

A	B	C	D
4	3	2	1

(c)

A	B	C	D
2	4	1	3

(d)

A	B	C	D
3	2	1	4

33.

If uncertainty in position and momentum are equal, then minimum uncertainty in velocity is _________

(a)

\(\frac { 1 }{ m } \sqrt { \frac { h }{ \pi } } \)

(b)

\( \sqrt { \frac { h }{ \pi } } \)

(c)

\(\frac { 1 }{ 2m } \sqrt { \frac { h }{ \pi } } \)

(d)

\( { \frac { h }{4\pi } } \)

34.

How many electrons in an atom with atomic number 105 can have (n + 1) = 8 ?

(a)

(b)

(c)

(d)

unpredictable

35.

The total number of orbitals associated with the principal quantum number n = 3 is _________

(a)

(b)

(c)

(d)

36.

Which one of the following orbitals is spherical in shape?

(a)

(b)

(c)

(d)

37.

Among the three metals, zinc, copper and silver, the electron releasing tendency decreases in the following order.

(a)

zinc > silver > copper

(b)

zinc > copper > silver

(c)

silver > copper > zinc

(d)

copper > silver > zinc

38.

Which one of the following represents 180 g of water ?

(a)

5 Moles of water

(b)

90 moles of water

(c)

\(\frac { 6.022\times { 10 }^{ 23 } }{ 180 } \) molecules of water

(d)

6.022\(\times\)10²⁴molecules of water

39.

As per Aufbau principle, arrange the orbitals in increasing order of energy __________

(a)

4p > 4d > 5s > 5p

(b)

4p < 4d < 5s < 5p

(c)

4d < 4p < 5s < 5p

(d)

4p < 5s < 4d < 5p

40.

The oxidation number of oxygen in O₂ is__________

(a)

(b)

(c)

(d)

-2

41.

Fe2 + \(\longrightarrow\) Fe³⁺ + e^- is a ________ reaction.

(a)

redox

(b)

reduction

(c)

oxidation

(d)

decomposition

42.

Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reactions does not show oxidising behaviour ?

(a)

Cu + 2H₂SO₄ \(\longrightarrow \) CuSO₄ +SO₂ + 2H₂O

(b)

C + 2H₂ + SO₄ \(\longrightarrow \) CO₂ + 2SO₂ + 2H₂O

(c)

BaCl₂ + H₂SO₄ \(\longrightarrow \) BaSO₄ + 2HCl

(d)

None of the above

43.

When 22.4 litres of H₂(g) is mixed with 11.2 litres of Cl₂(g), each at 273 K at 1 atm the moles of HCl (g), formed is equal to ______.

(a)

2 moles of HCl (g)

(b)

0.5 moles of HCl (g)

(c)

1.5 moles of HCl (g)

(d)

1 moles of HCl (g)

44.

For d-electron, the orbital angular momentum is ___________

(a)

\(\frac { \sqrt { 2 } h }{ 2\pi } \)

(b)

\(\\ \frac { \sqrt { 2h } }{ 2\pi } \)

(c)

\(\frac { \sqrt { 2\times 4 } h }{ 2\pi } \)

(d)

\(\frac { \sqrt { 6 } h }{ 2\pi } \)

45.

Which of the following pairs of d-orbitals will have electron density along the axes ?

(a)

d_z2, d_xz

(b)

d_xz, d_yZ

(c)

d_z2, d_x²-y²

(d)

d_xy ,d_x^2-y²

46.

According to the Bohr Theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon?

(a)

n = 6 to n = 1

(b)

n = 5 to n = 4

(c)

n = 5 to n = 3

(d)

n = 6 to n = 5

47.

1 g of an impure sample of magnesium carbonate (containing no thermally decomposable impurities) on complete thermal decomposition gave 0.44 g of carbon dioxide gas. The percentage of impurity in the sample is ______________.

(a)

(b)

4.4%

(c)

16%

(d)

8.4%

48.

Splitting of spectral lines in an electric field is called _____________

(a)

Zeeman effect

(b)

Shielding effect

(c)

Compton effect

(d)

Stark effect

Assertion and reason

2 x 2 = 4

49.

Assertion: Equal volumes of all the gases do not contain equal number of atoms
Reason: Atom is the smallest particle which takes part in chemical reactions.
Codes:
(a) Both assertion and reason are correct and reason is the correct explanation for assertion
(b) Both assertion and reason are correct but reason is not the correct explanation for assertion
(c) Assertion is true but reason is false.
(d) Both assertion and reason is false.

(a)

Both assertion and reason are correct and reason is the correct explantion for assertion

(b)

Both assertion and reason are correct but reason is not the correct explantion for assertion

(c)

Assertion is true but reason are false

(d)

Both assertion and reason are false

50.

Assertion: Two mole of glucose contains 12.044 x 10²³ molecules of glucose
Reason: Total number of entities present in one mole of any substance is equal to 6.02 x 10²²
(a) both assertion and reason are true and the reason is the correct explanation of assertion
(b) both assertion and reason are true but reason is not the correct explanation of assertion
(c) assertion is true but reason is false
(d) both assertion and reason are false

(a)

both assertion and reason are true and the reason is the correct explanation of assertion

(b)

both assertion and reason are true but the reason is not the correct explanation of assertion

(c)

an assertion is true but reason is false

(d)

both assertion and reason are false