You can write on the Place your answers to the multiple choice questions on the

Question

You can write on the Place your answers to the multiple choice questions on the answer sheet. You can esam, however. 6 Which i s the best molecular explanation for 1 wnich electron transition is will emit Sighe of of a sealed the shortest wavelength? balloon example, taking a store bought baloon due to a temperature decrease (for d 3 to n-2 frequency? a The molecules collide with greater decrease to keep fore, so volume P constant 100 nm b. There are fewer molecules present, so volume must decrease to keep P Which of the following occur as the wavelength of a photon of light decreases? c. There are more molecules present, se volume must decrease to keepP the energy increases b. the frequency decreases the speed decreases d. Planck's constant increases a. d The molecules move more slowly, so volume must decrease to keep P c. 4. Agas at25 in a 100L tank has . pressure of 1.00 atm. The gas is transferred to a 20.01 tank at 0, which statement is 7, 50.0g of three gases, Ag, SF and O, are placed separately into three identical containers. Which container will have the a The pressure of the gas is halved. b. The pressure in the tank is doubled. c. The gas pressure is 1.00 atm d. None of the above highest pressure? Temperature and volume of all three containers are the same. a. The container with Ar will have the highest pressure highest pressure. highest pressure. pressure 5. An FM radio station broadcasts electromagnetic radiation at a frequency of 100.6 MHz. What is the waveiength of this b. The container with SFa will have the c. The container with Cl, will have the d. All three containers will have the same radiation in meters? (1 MHz-10 Hz) a. 3.018 x 10 3.018 x 100 c.2982 c. 2.982 d 2.982 x 10

Explanation / Answer

(1) a

n=3 to n=1 transition will emit light of higher energy.

E= hc/lambda

So, energy is inversely proportional to wavelength.

(2) b

Since, frequency is inversely proportional to wavelength.

(3) a

(4) d

(5) c

(6) d

(7) a

Since, pressure of gas is directly proportional to moles.

And moles = mass/molar mass

As, masses of the three gases are same.

So, pressure is inversely proportional to molar mass.

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