IBA STS MDCAT Past Paper 08-12-2024

Q91: The system that drains back fluid from the body to the circulatory system is _____?

وہ نظام جو جسم سے سیال کو گردشی نظام تک پہنچاتا ہے؟

Immune system

Lymphatic system

Digestive system

None of these

Q92: Choose the correct flow of impulse transmission in the human heart?

انسانی دل میں تسلسل کی ترسیل کے صحیح بہاؤ کا انتخاب کریں؟

SA node → AV node → Purkinje fibers → Bundle of His

AV node→ SA node → Purkinje fibers → Bundle of His

SA node → AV node → Bundle of His → Purkinje fibers

None of these

Q93: Completes the life cycle in two boats snail, sheep or man?

دو کشتیوں میں زندگی کا چکر مکمل کرتا ہے گھونگا، بھیڑ یا انسان؟

Snail

Liver Fluke

Earthworm

None of these

Q94: Cyclic phosphorylation is stimulated by ______?

سائیکلک فاسفوریلیشن ______ کے ذریعہ متحرک ہے؟

High level of NADPH

Low level of NADPH

Low light intensity

None of these

Q95: In simple harmonic motion, acceleration is maximum when ______?

سادہ ہارمونک حرکت میں، سرعت زیادہ سے زیادہ ہوتی ہے جب ______؟

Velocity is maximum

Displacement is zero

Displacement is maximum

None of these

Q96: Catalytic hydrogenation of benzene gives _____?

بینزین کا کیٹلیٹک ہائیڈروجنیشن _____ دیتا ہے؟

Cyclohexane

Cyclohexene

Hexane

None of these

Q97: What is volume considered as?

والیوم کیا سمجھا جاتا ہے؟

Extensive property

Intensive property

State function

None of these

Q98: If a body falls with a constant acceleration of 9.8 m/s², it means ______?

Velocity decreases by 9.8 m/s each second

Velocity increases by 9.8 m/s each second

Velocity remains constant

None of these

Q99: In the chlorination of benzene, which reagent is used?

بینزین کی کلورینیشن میں، کون سا ری ایجنٹ استعمال ہوتا ہے؟

AlCl₃

FeCl₃

NaCl

None of these

Explanation

FeCl₃ acts as a Lewis acid catalyst in the chlorination of benzene.

It facilitates the generation of the electrophile ( $Cl^+$ ) needed for the substitution reaction.

Q100: A wave has a frequency of 500 Hz and a wavelength of 2 cm. What will be its velocity?

5 m/s

10 m/s

15 m/s

None of these

Explanation

Wave velocity $v$ is calculated using the formula $v = f lambda$ , where $f$ is frequency and $lambda$ is wavelength.

Substituting values: $v = 500 times 0.02 = 10 , text{m/s}$ .