Explanation

اسم معرفہ وہ اسم ہوتا ہے جو کسی خاص چیز، جگہ یا فرد کی نشاندہی کرے۔

چنبیلی ایک خاص پھول کا نام ہے، اس لیے یہ اسم معرفہ ہے۔

Explanation

بلوچستان میں گلہ بانی کا پیشہ بہت عام ہے کیونکہ یہاں کی زیادہ آبادی دیہی اور چراگاہوں پر منحصر ہے۔

اس خطے میں جانوروں کی دیکھ بھال اور مال مویشی پالنا روزمرہ کا اہم ذریعہ معاش ہے۔

Explanation

The formula to calculate max electrons in an orbit is 2n², where n = orbit number.

1st orbit (n = 1): 2 × 1² = 2 electrons

2nd orbit (n = 2): 2 × 2² = 8 electrons

For the 3rd orbit (n = 3): 2 × 3² = 18 electrons

Explanation

Sand and gravel are commonly used in filtration to remove impurities and suspended particles from water.

They provide a physical barrier and are effective in both slow and rapid sand filtration processes.

Explanation

Coagulation helps neutralize the charges on particles so they can stick together.

Flocculation follows, where these particles clump into larger flocs for easy removal—both are key in water purification.

Explanation

Sodium nitrate, sodium citrate, and even sodium sulphate (less commonly) are used in preserving food by preventing microbial growth.

These salts help in extending shelf life and maintaining flavor or color in processed foods.

Explanation

Abdul Malik Aasmai (740 – 828 AD):

He was regarded as a specialist in animal sciences.

He wrote many books on animals and plants.

One of his books, “Al-Khei,l” is about horses.

A second, “Al-lbil” about camels.

A third “A-shat” about sheep.

A fourth “Al-Wahoosh” is about wild animals.

In the book “Khalaq-ul-Insan”, he described the different parts and functions of the human body.

Explanation

Biometry is the application of statistical analysis to biological data.

It helps in studying health-related trends, like the number of people getting lung cancer due to smoking.