Explanation

 Crystals in which lattice points are occupied by metal ions are a) Ionic crystals. 

Ionic crystals are formed by the electrostatic attraction between positively charged metal cations and negatively charged anions.

These ions are arranged in a regular lattice structure. 

Explanation

• Mitochondria (plural of Mitochondrion) are also called as "powerhouses" of the cell.
• As they generate most of the energy for the cell through the process of cellular respiration.

Explanation

The molar mass of CaCO₃ is approximately 100 g/mol.

The molar mass of calcium (Ca) in CaCO₃ is about 40 g/mol.

The proportion of calcium in CaCO₃ is  40/ 100 = 0.4

Therefore, in 0.1 g of CaCO₃, the amount of calcium is  0.1×0.4=0.04 g.

Explanation

When a wire is stretched to double its length, its resistance becomes:

R' = ρ × (2L) / (A/2) = 4 × R

So, the new resistance is 4r ohms

Explanation

 Leukemia is a type of cancer that causes an abnormal increase in the production of white blood cells, which are immature and unable to fight infection effectively. 

Explanation

If the frequency of incident radiation in the photoelectric effect is increased beyond the threshold frequency, it will not affect the photoelectric current. 

Explanation

 Cs (Cesium), Rb (Rubidium), and K (Potassium) are all alkali metals that can form superoxides when heated in excess oxygen. 

Explanation

Each mole of CO₂ contains 2 atoms of oxygen, which is 2 × 16 = 32 g of oxygen.

So, if 32 g of oxygen is in 1 mole of CO₂, then:

16 g of oxygen = 16 / 32 = 0.5 moles of CO₂

Explanation

The appearance of cloudiness in the Lucas test for alcohol is due to the formation of alkyl chlorides. 

Explanation

Musa is one of the many prophets that meets Muhammad in the seven heavens following the latter's ascension from Jerusalem during the Miʿraj.

Prophet Musa Ibn Imran  is the most frequently mentioned individual in The Holy Quran, his name being mentioned 136 times.