Which of following statements does not a...

Which of following statements does not apply to reverse osmosis?

It is used for water purification

In this technique, pressure greater than osmotic pressure is applied to the system

It is a passive process

It is an active process

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Which of the following statements does not apply to the elements belonging to the same period of the periodic table?

The number of valence electrons increases on moving from left to right.

The atomic size increases from left to right

The atomic size decreases from left to right

The metallic character of elements decreases from left to right.

It is the natural aging of a lake by nutrient enrichment of its water.

In a young lake the water is cold and clear and support less life.

Pollutants released by man radically accelerate the aging process of a lake.

Overgrowth algae lead of scum that depletes the level of dissolved oxygen in the water.

To maintain a large standing army at other's expense

To keep India safe from Napoleonic danger

To secure a fixed income for the company

To establish British paramountcy over the Indian States