Given that the reduced temperature, the reduced pressure, the reduced volume, Thus, it can be said that the reduced equation of state may be given as:

1.

2.

3.

4.

Level 3: 35%-60%

1

2

3

4

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Q62:

The suitable reaction steps to carry out the following transformation is:

1. $\to_{(ii) H_{2} O_{2} . NaOH}^{(i) {BH}_{3} . THF} \overset{{HlO}_{4}}{\to}$

2. $\to_{{({CH}_{3})}_{3} C . COOH . {OH}^{-}}^{Os O_{4}} \to_{H_{2} O}^{K_{3} {Cr}_{2} O_{7} . H_{2} {SO}_{4}}$

3. $\to_{(ii) H_{2} O_{2} . NaOH}^{(i) {BH}_{3} . THF} \to_{{CH}_{2} {Cl}_{2}}^{PCC}$

4. $\overset{H_{2} O H_{2} {SO}_{4} (dil .)}{\to} \to_{{CH}_{2} {Cl}_{2}}^{PCC}$

63%

Level 2: 60%+

1

2

3

4

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Q63:

Here, Z is:

1. SO₃

2. Colloidal sulphur

3. Gaseous sulphur

4. Solid Sulphur

50%

Level 3: 35%-60%

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Q64:

For preparing 3.00 L of 1M NaOH by mixing portions of two stock solutions (A and B) of 2.50 M NaOH and 0.40 M NaOH respectively. Find out the amount of B stock solution (in L) added.

1. 8.57 L

2. 2.14L

3. 1.28 L

4. 7.51 L

59%

Level 3: 35%-60%

1

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3

4

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Q65:

Sodium sulphite is used in preserving squashes and other mildly acidic foods due to:

1. Potassium salt has preservative action

2. Potassium metabisulphite prevents oxidation

3. Potassium metabisulphite is not influenced by acid

4. Sulphur dioxide and sulphurous acid formed kill bacteria and germs

54%

Level 3: 35%-60%

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Q66:

The Vividh Bharti Station of All India Radio, Delhi, broadcasts on a frequency of 1,368 kHz (Kilohertz). Calculate the wavelength (

.) of the electromagnetic radiation emitted by transmitter. Which part of the electromagnetic spectrum does it belong to?

1. 319.4 m and X-rays

2. 319.4 m and radio wave

3. 219.3 m and microwave

4. 219.3 m and radio wave

53%

Level 3: 35%-60%

1

2

3

4

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Q67:

Which of the following soap/detergent is least, reduce space biodegradable?

1. ${CH}_{3} - {({CH}_{2})}_{11} - {OSO}_{2} Na$

2. $C_{17} H_{35} - COONa$

3.

4.

51%

Level 3: 35%-60%

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Q68:

In an atom, an electron is moving with a speed of 600 m/s with an accuracy of 0.005%. The certainty with which the position of the electron can be located is:
(Given, h=6.6×10^-34 Kgm²s^-1, the mass of electron e_m = 9.1×10^-31 kg)

1. 2.15×10^-3m
2. 2.78×10^-3m
3. 1.92×1^-3 m
4. 3.24×10^-3m

51%

Level 3: 35%-60%

1

2

3

4

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Q69:

Buna-N, a synthetic rubber is copolymer of:

1. $H_{2} C = CH - CH = {CH}_{2} and H_{5} C_{6} - CH = {CH}_{2}$

2. $H_{2} C = CH - CN and H_{2} C = CH - CH = {CH}_{2}$

3.

4.

59%

Level 3: 35%-60%

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3

4

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Q70:

What would be the heat released when an aqueous solution containing 0.5 mole of HN03 is mixed with 0.3 mole of OH^-?
(Enthalpy of neutralization is - 57.1kJ)

1. 28.5 kJ

2. 17.1 kJ

3. 45.7 kJ

4. 1 .7 kJ

59%

Level 3: 35%-60%

1

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3

4

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Given that the reduced temperature, the reduced pressure, the reduced volume, Thus, it can be said that the reduced equation of state may be given as:

1.

2.

3.

4.

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Given that the reduced temperature, the reduced pressure, the reduced volume, Thus, it can be said that the reduced equation of state may be given as: 1. 2. 3. 4.

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Given that the reduced temperature, the reduced pressure, the reduced volume, Thus, it can be said that the reduced equation of state may be given as:

1.

2.

3.

4.