Explanation

Chemical energy is stored in a dry cell.

A dry cell is a device that converts chemical energy into electrical energy.

Chemical energy is the energy stored in the bonds of atoms and molecules. 

Explanation

Explanation

Explanation

Explanation

1 g of fat provides 37 kJ of energy on oxidation while

1 g of carbohydrate on oxidation gives 17 kJ of energy.

Hence, fat has the highest calorific value.

Explanation

A primary function of the kidneys is Regulation of fluids, electrolytes and acid-base balance

1. Kidneys maintain water balance.

2. They regulate electrolytes (Na⁺, K⁺, Cl⁻).

3. Control blood pH via acid-base regulation.

4. Remove metabolic wastes from blood.

5. Essential for homeostasis.

   
   

   Last updated question01  March 2026

Explanation

Honey has been called the only food that truly lasts forever.

Honey is considered the only food that doesn't spoil.

Because of its low water content and high sugar content.

It prevents germs from growing.

Explanation

Vitamin D toxicity, also called hypervitaminosis D.

It causes hypercalcemia and renal failure.

Daily Vitamin D requirement is 200–600 IU.

While skin produces up to 10,000 IU after full UV exposure.

Explanation

As you move from the equator towards the poles, the latitude increases (up to 90 degrees).

The further you go from the equator in any direction,

the difference between the duration of the day and night at different times of the year will be bigger.

Additional information 

there are two points in the year when day and night are approximately equal in duration. 

This is called an equinox.

The equinoxes occur around:

• March 20th-21st 
• September 22nd-23rd each year.

Explanation

Cryptography is the art and science of keeping information secure from unintended audiences, of encrypting it.

It is also called Crytology.

The term was first introduced in 1553.