Atomic Structure Test 6

A test from chapter 5 i.e Atomic Structure of Chemistry part 1. This is Free online test for FSc and Entry test Preparation for UET, NUST, FAST, GIKI, PIEAS, NFC, Punjab University, UHS, other Engineering Universities and Medical Colleges.

1. When the pressure of the gas in discharge tube is reduced, which of the following becomes more prominent

A) gas glows
B) gas ionizes
C) a discharge takes place
D) gas conducts electricity

2. Goldstein discovered that besides the cathode rays, another type of rays are produced in the discharge tube which are called

A) alpha rays
B) beta rays
C) positive rays
D) gamma rays

3. The e/m value for the positive rays in the discharge tube depends upon

A) nature of electrode use
B) nature of gas used
C) composition of the gas
D) pressure

4. The distance between the two adjacent crests or troughs is called

A) wave number
B) frequency
C) wavelength
D) amplitude

5. The value of Planck’s constant “h” is

A) 6.625 x 10–34 cal
B) 6.625 x 10–34 J sec
C) 6.625 x 10–34 kJ
D) 6.625 x 10–34 k cal

6. In the Bohr’s model of atom the electron in an energy level emits or absorbs energy only when it

A) remains in the same energy level
B) dies out
C) changes its energy level
D) jumps away

7. The energy associated with an electron resolving in first orbit is

A) – 2.178 x 10–18 k J/mol
B) – 1313.31 k J/mol
C) – 328.32 k J/mol
D) – 82.08 k J/mol

8. The regions of spectrum are

A) three
B) seven
C) eight
D) five

9. The dispersion of the components of white light when it is passed through prism is called

A) rainbow
B) light pattern
C) refraction
D) spectrum

10. Which of the following colours has the shortest wavelength in the visible spectrum of light

A) red
B) blue
C) violet
D) green