SPSC 25 years Past Papers 2001 to 2025

Get the complete SPSC 25 years Past Papers 2001 to 2025 PDF MCQs for study and exam preparation.

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Q1871: When 3p orbital is complete entering electron will go to ______?

A. 3p
B. None of these
C. 4p
D. 4s

Q1872: The source of electromagnetic radiation which is used in the instrument atomic absorptions spectrophotometer is _____?

برقی مقناطیسی تابکاری کا ماخذ جو آلے کے جوہری جذبوں میں استعمال ہوتا ہے اسپیکٹرو فوٹومیٹر _____ ہے؟

A. Deuterium lamp
B. Tungsten lamp
C. Hallow cathode lamp
D. None of these

Q1873: If gram molecular weight of gas is 32g its density will be _______?

A. 1.53 g/L
B. 1.43 g/L
C. 1.63 g/L
D. None of these

Q1874: Phenols are ______?

فینول ______ ہیں؟

A. Natural compounds
B. Basic in nature
C. Acidic in nature
D. None of these

Q1875: A catalyst ______?

ایک اتپریرک کیا ہے؟

A. Increases the activation energy
B. Alters the reaction mechanism
C. None of these
D. Increases the average kinetic energy of the reactants

Q1876: Principal quantum number determines how far from the nucleus the _______ is to be found.

پرنسپل کوانٹم نمبر طے کرتا ہے کہ نیوکلئس سے کتنا دور _______ پایا جانا ہے۔

A. Neutron
B. Proton
C. Electron
D. None of these

Explanation

The principal quantum number ( $n$ ) determines the energy level and the average distance of an electron from the nucleus in an atom.

A higher $n$ value indicates that the electron is found farther from the nucleus.

Q1877: Which is more energetic?

کون سا زیادہ توانائی بخش ہے؟

A. 𝛾-rays
B. 𝛼-particles
C. 𝛽-particles
D. None of these

Q1878: Assessment in Education is the process of _____ information.

تعلیم میں تشخیص _____ معلومات کا عمل ہے۔

A. Recording
B. Gathering
C. All of these
D. Interpreting

Q1879: The mode in a set of scores of 5, 7, 9, 11, 13, 13, 17, 19, and 20 is _____?

A. None of these
B. 11
C. 20
D. 13

Q1880: Present-day philosophy of education lays emphasis upon the adjustment of the whole individual on _____ adjustment.

موجودہ دور کا فلسفہ تعلیم _____ ایڈجسٹمنٹ پر پورے فرد کی ایڈجسٹمنٹ پر زور دیتا ہے۔

A. Politically
B. Correctly
C. Socially
D. None of these

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