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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
It can never produced to completion
the number of moles of reactant and protect are equal
it can be influenced by the catalyst
It can be obtained in open vessel
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Explanation
A reversible reaction can never proceed to completion.
This is because a r eversible reaction is an equilibrium reaction in which both forward and reverse reactions occur at the same rate.
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ND17-1-2023
متواتر جدول میں عناصر کو ____ کے مطابق ترتیب دیا جاتا ہے؟
Increasing atomic mass
Decreasing atomic number
Both A and B
Increasing in atomic number
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Explanation
The modern periodic table is arranged by increasing atomic number (number of protons). This arrangement resolves inconsistencies in earlier tables and groups elements with similar properties together.
مندرجہ ذیل میں سے کون سا توازن پر الٹ جانے والے رد عمل کے لیے درست ہے؟
The rates of the forward is greater than backward reaction
The rates of the forward is lesser than backward reaction
The rate of the backward is equal to forward reaction
The rates of the backward is greater than forward reaction
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Explanation
At equilibrium, the rate of forward reaction is equal to the rate of backward reaction.
This is as per the definition of the equilibrium .
When a reversible reaction is carried out in a closed vessel, a stage is reached when the forward and the backward reactions proceed with the same speed.
Increases the average kinetic energy of the reactants
Alters the reaction mechanism
Increases the activation energy
None of these
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Explanation
A catalyst provides an alternative reaction pathway with lower activation energy. It does not change reactants' energy but speeds up the reaction.
6.4×10 ^−3
6.4 × 10 ^− 4
6.4 × 10 ^− 2
64 × 10^ − 3
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Explanation
To express 0.0064 in scientific notation:
Move the decimal point 4 places to the right → 6.4 × 10⁻⁴.
پورے دودھ میں پانی کی فیصد تقریبا _____ ہے؟
70%
87%
75%
90%
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Explanation
Milk is approximately 87 % water and 13 % solids .
The solids include fats, proteins, vitamins, and minerals.
ایک دوہری کے دوران ، _____ کے ذریعہ دوئم کے مرحلے میں تبدیلی آتی ہے؟
π⁄2 rad
π rad
2π rad
None of these
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Explanation
In one complete oscillation (one full cycle), the phase of an oscillating system changes by 2 π 2pi This corresponds to the system returning to its starting position in a periodic motion, such as simple harmonic motion.
مندرجہ ذیل میں سے کون سا ملک افریقہ میں نہیں ہے؟
Namibia
Ecuador
Burkina Faso
Coted Ivories
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Explanation
Ecuador is a country located in South America , not Africa .
It is situated in the northwest part of the continent.
It is bordered by Colombia, Peru, and the Pacific Ocean.
چائے کے پتے کے لئے سب سے اہم محرک _____ ہے؟
Brucine
Caffeine
Phyenylalanine
Theine
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Explanation
Caffeine occurs naturally in the tea plant,
Camellia sinensis, so all brewed tea contains some caffeine.
Tea leaves contain 3.5% caffeine,
while
Coffee beans have 1.1–2.2%.
Iron
Gold
Silver
None of these
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Explanation
The most stable metals , such as gold and platinum , do not corrode easily
because they do not lose electrons easily.
while
Metals placed higher in the reactivity series, such as iron, zinc, etc ., get corroded very easily
