TS Polycet (Polytechnic) 2021 Previous Question Paper with Answers And Model Papers With Complete Analysis

TS POLYCET
Section — C
CHEMISTRY

91) In an atom, when electron jump from ground state excited state

A) no change in energy
B) energy is emitted
C) energy is absorbed
D) depends on atom

View Answer

C) energy is absorbed

Explanation:When an electron jumps from ground to excited state, it absorbs energy.
Answer: Energy is absorbed

92) The orbital which is filled with electrons immediately after ‘3p’ is

A) 4s
B) 3d
C) 4f
D) 4p

View Answer

A) 4s

Explanation:After 3p, the next orbital filled (according to the Aufbau principle) is 4s.
Answer: 4s

93) When n = 4, the total number of subshells in an orbit is

A) 1
B) 4
C) 2
D) 3

View Answer

B) 4

Explanation:For n = 4, the number of subshells = n⇒ 4 subshells: 4s, 4p, 4d, 4f
Answer: 4

94) Which of the following has larger wavelength in electromagnetic spectrum

A) Gamma rays
B) UV rays
C) X-rays
D) Radio waves

View Answer

D) Radio waves

Explanation:In EM spectrum, radio waveshave the longest wavelength.
Answer: Radio waves

95) The quantum number which explains about the special orientation of orbitals is

A) n
B) l
C) m₁
D) m_s

View Answer

C) m₁

Explanation:Magnetic quantum number (m₁)explains orientationof orbitals in space.
Answer: m₁

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