پانی کی زیادہ سے زیادہ کثافت ہے
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A. 0 c
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B. 6 c
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C. 4 c
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D. 5 c
Explanation
Water has a maximum density of 4 degrees Celsius.
while
Water freezes at 0 degrees Celsius and 32 degrees Fahrenheit.
Molar mass: 18.01528 g/mol
مندرجہ ذیل میں سے کون سا گیسوں کی خصوصیت نہیں ہے؟
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A. Less energy is required to break force of attraction between gas molecules
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B. Gas molecule move in straight line
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C. They move continuously
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D. They adopt shape of the container
Explanation
Gas molecules have very weak forces of attraction already, so breaking them does not require much energy.
Thus, "Less energy is required..." is NOT a unique characteristic describing their general behavior compared to solids or liquids.
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A. negative
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B. none
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C. positive
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D. neutral
Explanation
Anions are negatively charged ions.
They are formed when non-metal gains electrons.
They gain one or more than one electron.
Therefore, they possess a net negative charge.
____
Cations are ions that are positively charged
ND18-9-2023
✅ Correct: 0 |
❌ Wrong: 0 |
📊 Total Attempted: 0
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