Structure - Physical Chemistry - Chemistry Previous Year Questions

1

2008 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2008

The de-Broglie wavelength of the electron is \[ \lambda / \text{pm} = (a/ \phi)^{1/2} \]. The value of \"a\" in volts is

A

1.5 × 10¹⁰

B

1.5 × 10⁶

C

6.63 × 10⁻⁵

D

2.5 × 10¹⁸

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2

2008 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2008

The minimum value of \phi (V) for the electron to diffract from the (100) planes is

A

3000

B

300

C

30

D

3

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3

2009 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2009

The de Broglie wavelength for a He atom travelling at 1000 ms^-1 (typical speed at room temperature) is

A

99.7 × 10^-12 m

B

199.4 × 10^-12 m

C

199.4 × 10^-18 m

D

99 × 10^-6 m

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4

2011 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2011

The sum of n terms of the series 4+44+444+.... is

A

(4/81) [10^{n+1} - 9n - 1]

B

(4/81) [10^{n-1} - 9n - 1]

C

(4/81) [10^{n+1} - 9n - 10]

D

(4/81) [10^n - 9n - 10]

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5

2011 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2011

Given that f(y) = | y | / y, and q is any non-zero real number, the value of | f(q) - f(-q) | is

A

0

B

-1

C

1

D

2

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6

2012 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2012

For a face centered cubic lattice, the Miller indices for the first Bragg's peak (smallest Bragg angle) are

A

0 0 2

B

1 1 1

C

0 0 1

D

1 1 0

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7

2012 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2012

If \((1.001)^{1259} = 3.52\) and \((1.001)^{2062} = 7.85\), then \((1.001)^{3321} =\)

A

2.23

B

4.33

C

11.37

D

27.64

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8

2013 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2013

If \( |1 - 2X + 9| = 3 \) then the possible value of \( |1 - X| - X^2 \) would be:

A

30

B

-30

C

-42

D

42

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9

2024 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2024

The major product in the following reaction sequence is

A

B

C

D

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10

2024 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2024

In thermogravimetric analysis, 12.45 mg of CuSO₄·5H₂O was subjected to heating under N₂ atmosphere. At a particular temperature, there was a weight loss of 3.6 mg. The number of water molecule(s) lost per formula unit is ____.
(Given molar mass (in g mol^-1) of H = 1.0, O = 16.0, S = 32.0, and Cu = 63.5)
(rounded off to the nearest integer)

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11

2025 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2025

The kinetic energies of an electron (e) and a proton (p) are E and 3E, respectively. Given that mass of a proton is 1836 times that of an electron, the ratio of their de Broglie wavelengths (λ_e/λ_p) is ______ (rounded off to two decimal places).

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12

2007 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2007

The dimension of Planck constant is (M, L and T denote mass, length and time respectively)

A

ML²T⁻²

B

ML²T⁻¹

C

M²L⁻¹T⁻¹

D

M⁻¹L²T⁻²

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13

2010 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2010

Among W (work), Q (heat), U (internal energy) and S (entropy)

A

W and U are path functions but Q and S are state functions

B

W and S are path functions but Q and U are state functions

C

S and U are path functions but Q and W are state functions

D

W and Q are path functions but U and S are state functions

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14

2010 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2010

Given digits 2, 2, 3, 3, 3, 4, 4, 4, 4 how many distinct 4 digit numbers greater than 3000 can be formed?

A

50

B

51

C

52

D

54

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15

2010 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2010

If 137 + 276 = 435 how much is 731 + 672?

A

534

B

1403

C

1623

D

1513

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16

2018 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2018

For \(0 \leq x \leq 2\pi\), \(\sin x\) and \(\cos x\) are both decreasing functions in the interval _______.

A

\(\left(0, \frac{\pi}{2}\right)\)

B

\(\left(\frac{\pi}{2}, \pi\right)\)

C

\(\left(\pi, \frac{3\pi}{2}\right)\)

D

\(\left(\frac{3\pi}{2}, 2\pi\right)\)

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17

2018 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2018

The area of an equilateral triangle is \(\sqrt{3}\). What is the perimeter of the triangle?

A

2

B

4

C

6

D

8

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18

2018 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2018

Arrange the following three-dimensional objects in the descending order of their volumes:
(i) A cuboid with dimensions \(10\text{ cm}, 8\text{ cm}\) and \(6\text{ cm}\)
(ii) A cube of side \(8\text{ cm}\)
(iii) A cylinder with base radius \(7\text{ cm}\) and height \(7\text{ cm}\)
(iv) A sphere of radius \(7\text{ cm}\)

A

(i), (ii), (iii), (iv)

B

(ii), (i), (iv), (iii)

C

(iii), (ii), (i), (iv)

D

(iv), (iii), (ii), (i)

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19

2018 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2018

If \(x^2 + x - 1 = 0\) what is the value of \(x^4 + \frac{1}{x^4}\)?

A

1

B

5

C

7

D

9

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20

2020 · Chemistry · Physical Chemistry · Structure

Chemistry (CY) 2020

The two pie-charts given below show the data of total students and only girls registered in different streams in a university. If the total number of students registered in the university is 5000, and the total number of the registered girls is 1500; then, the ratio of boys enrolled in Arts to the girls enrolled in Management is ______.

A

2 : 1

B

9 : 22

C

11 : 9

D

22 : 9

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