GATE CY topic:chemistry PYQs & Answers — Page 33

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Questions 321–330 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 33 of 65

EMF of the following cell

at 25 °C and 1 bar is 0.36 V. The value of the mean activity coefficient (rounded off to three decimal places) of CuSO

at 25 °C and 1 bar is [Given: Standard electrode potential values at 25 °C for

and

are 0.34 V and 0.62 V, respectively. Consider: RT/F at 25 °C = 0.0256 V]

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The radius of gyration (in nm, rounded off to one decimal place), for three dimensional random coil linear polyethelene of molecular weight 8,40,000 is [Given: C–C bond length = 0.154 nm]

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The activation energy of the elementary gas-phase reaction O

+ NO → NO

+ O

is 10.5 kJ mol

. The value of the standard enthalpy of activation (rounded off to two decimal places in kJ mol

) at 25 °C is [Given: R is 8.314 J mol

]

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In a collection of molecules, each molecule has two non-degenerate energy levels that are separated by 500 cm

. On measuring the population at a particular temperature, it was found that the ground state population is 10 times that of the upper state. The temperature (in K, rounded off to the nearest integer) of measurement is [Given: Value of the Boltzmann constant = 0.695 cm

]

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The change in entropy of the surroundings (in J K

, rounded off to two decimal places) to convert 1 mol of supercooled water at 263 K to ice at 263 K at 1 bar is [Consider:

at 273 K = 6.0 kJ mol

, and the molar heat capacity of water is higher than that of ice by 37.0 J K

mol

in the temperature range of 263 K to 273 K]

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Getting to the top is ______ than staying on top.

Your answerChoose one option.

more easy

much easy

easiest

easier

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The mirror image of the above text about the x-axis is

Your answerChoose one option.

Diagram for Chemistry question 2 (figure 2)

Diagram for Chemistry question 2 (figure 3)

Diagram for Chemistry question 2 (figure 4)

Diagram for Chemistry question 2 (figure 5)

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In a company, 35% of the employees drink coffee, 40% of the employees drink tea and 10% of the employees drink both tea and coffee. What % of employees drink neither tea nor coffee?

Your answerChoose one option.

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⊕ and ⊙ are two operators on numbers

and

such that

and

; If

, then

Your answerChoose one option.

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Four persons P, Q, R and S are to be seated in a row, all facing the same direction, but not necessarily in the same order. P and R cannot sit adjacent to each other. S should be seated to the right of Q. The number of distinct seating arrangements possible is:

Your answerChoose one option.

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GATE CY topic:chemistry PYQs

Question 61

Question 62

Question 63

Question 64

Question 65

Question 1

Question 2

Question 3

Question 4

Question 5