Explanation

Nitrogen gas (N₂) has a triple covalent bond between the two nitrogen atoms.

This triple bond makes N₂ very stable and unreactive under normal conditions.

Explanation

Sum = 4 + 5 + 6 + 8 + 12 = 35

Average = 35 ÷ 5 = 7

Explanation

Step 1: Recall the definition of probability

Probability is a measure between 0 and 1, inclusive.

Step 2: Evaluate the options

15% = 0.15 (between 0 and 1)

2/3 ≈ 0.67 (between 0 and 1)

-0.5 (less than 0)

0.01 (between 0 and 1)

Step 3: Determine which option is outside the valid range

-0.5 is less than 0, which is not valid for a probability.

Explanation

The ball shares the train’s horizontal velocity, so it moves forward with the train.

As a result, it comes back down into the thrower’s hand.

Explanation

Force = Change in momentum / Time (from Newton’s second law).

So, change in momentum in one second is defined as force.

Explanation

A letter was being written to her father by Mona.

The sentence is in past continuous tense: was writing.

In passive voice, past continuous becomes was being + past participle → was being written.

Explanation

Given the cost price (CP) of the TV set is Rs. 10,000 and the profit is Rs. 1,500:

Step 1: Calculate the selling price (SP).

SP = CP + Profit

= 10,000 + 1,500

= 11,500

Explanation

Methanol (CH₃OH) is polar due to the presence of the highly electronegative –OH group and its bent geometry.

Other molecules like CO₂ and CCl₄ are non-polar because of their symmetrical shape, despite having polar bonds.

Explanation

Universal means ایسی کوئی چیز جو دنیا بھر میں یا ہر جگہ قابل اطلاق ہو

Regional means کسی مخصوص علاقے یا خطے تک

Explanation

Reflect means اس کو جذب کیے بغیر (روشنی ، حرارت ، یا آواز) پھینک دینا ، یا کسی چیز کے بارے میں گہرائی سے سوچنا

Absorb means لینے یا بھگانے کے لئے