SPSC 25 years Past Papers 2001 to 2025

Q2031: Part of the word that occurs before any inflected affix _____?

Stem

Root

Base

None of these

Q2032: The Jury members _____ for almost an hour before signing the verdict.

Deliberated

Accidental

Deferred

None of these

Q2033: Magnetic vector potential is a vector _____?

مقناطیسی ویکٹر کی صلاحیت ایک _____ ویکٹر ہے؟

Whose divergence is equal to electric potential

Whose curl is equal to the magnetic flux density

Whose curl is equal to the electric field intensity

None of these

Explanation

Magnetic Vector Potential ( $mathbf{A}$ ) is a vector field whose curl gives the magnetic flux density ( $mathbf{B}$ ), expressed as: $B = \nabla \times A$

This potential is useful in electromagnetism as it simplifies Maxwell’s equations.

It is used in solving problems related to electromagnetic fields.

Q2034: A bacteriophage can be recognized by its _____?

ایک بیکٹیریوفیج کو اس کے _____ کے ذریعہ پہچانا جاسکتا ہے؟

Rounded shape

Irregular shape

Tadpole shape

None of these

Q2035: What is the primary reason why water has a high specific heat capacity compared to other liquids?

دوسری مائعات کے مقابلے میں پانی میں گرمی کی اعلی صلاحیت کی بنیادی وجہ کیا ہے؟

It has a nonpolar molecular structure

Hydrogen bonding between water molecules requires more energy to change temperature

Its molecular weight is high

None of these

Q2036: The shape of the DNA molecule is ______?

ڈی این اے انو کی شکل ______ ہے؟

Crescent-shaped

Spiral

Double helix

None of these

Q2037: DNA molecule does not contain ______?

ڈی این اے انو میں ______ نہیں ہے؟

Cytosine

Adenine

Uracil

None of these

Q2038: In which of the following reactions is a new carbon-carbon bond not formed?

مندرجہ ذیل میں سے کون سا رد عمل میں نیا کاربن کاربن بانڈ تشکیل نہیں دیا گیا ہے؟

Cannizzaro reaction

Wurtz reaction

Aldol condensation

None of these

Q2039: Calorie requirements vary according to all of the the following except?

کیلوری کی ضروریات مندرجہ ذیل کے مطابق مختلف ہوتی ہیں سوائے اس کے کہ؟

Climate

Occupation

Intelligence

None of these

Q2040: Which of the following chemical is used in the processing of anti-polio vaccine?

اینٹی پولیو ویکسین کی پروسیسنگ میں مندرجہ ذیل میں سے کون سا کیمیکل استعمال ہوتا ہے؟

Formaldehyde

Ethyl acetate

Methanol

None of these