PST PAST PAPER 2019 (06-10-2019)
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
21
6
21/7
9/21
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
To find 3/7 of 14:
(3/7) * 14 = 3 * 2 = 6
کلوروفیل انو کے سر میں نائٹروجن ایٹموں کی تعداد کتنی ہے؟
One
Two
Three
Four
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Explanation
The head of a chlorophyll molecule contains a porphyrin ring with a central magnesium (Mg) atom.
This ring has four nitrogen atoms that coordinate with the magnesium, forming a stable complex essential for photosynthesis .
مندرجہ ذیل میں سے کون زیادہ شدید جلتا ہے؟
Sun
Hot air
Steam
None of these
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Explanation
Steam causes more severe burns than boiling water because it carries latent heat of vaporization.
It releases extra energy when it condenses on the skin .
Timid
Courageous
Weak
None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
Bold means بہادر
Timid means ڈرپوک
ہوم ورک کا فائدہ یہ ہے کہ طلباء _____؟
Remains busy at home
May develop the habit of self-study
May be checked for study
None of these
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Explanation
Homework encourages students to study independently, building responsibility and time management. It reinforces what they learn in class , promoting better understanding and retention.
سن 1961 میں کس یونیورسٹی میں مائیکرو ٹیچنگ سسٹم کا آغاز ہوا؟
Stanford University
Oxford University
Punjab University
None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
The micro-teaching system was introduced at Stanford University in 1961 .
It was developed as a method for teacher training , allowing educators to practice teaching in a controlled, small-scale environment before applying their skills in larger classrooms.
In
By
With
On
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
" In " is defined as inside an area , moving from a point outside to a point inside.
" In the light of the lamp " is the correct phrase, meaning she was sewing within the illuminated area created by the lamp.
دیہات میں زندگی کو _____ کہا جاتا ہے؟
City life
Urban life
Rural life
None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
Explanation
" Rural life " refers to life in the countryside or villages , away from towns and cities.
It typically includes farming, less population density, and natural surroundings.
On
By
For
To
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Explanation
The correct phrase is " by his will ", which means according to his desire or choice .
" By " is used to show the agent or means through which something happens — here, his own will .
300
310
312
313
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Explanation
Let's calculate the total work hours:
250 men * 20 days * 5 hours/day = 25,000 man-hours
To finish the work in 10 days working 8 hours a day:
Let x be the number of men required:
x men * 10 days * 8 hours/day = 25,000 man-hours (to complete the same amount of work)
x * 80 = 25,000
x = 25,000 / 80
x = 312.5 (313)