Explanation

 Hazrat Loot (AS) was the maternal grandfather of Hazrat Ayub (AS)

Explanation

Metamorphic rocks are rocks formed from existing rocks whose mineralogy, chemistry, and texture  have  changed due to heat and pressure in the depths of the Earth's crust.

Explanation

The salt content in seawater is mainly due to the presence of sodium chloride i.e sodium and chlorine. The abundant element in  seawater is chloride, which accounts for 1.94% of  the total composition. 

 Chloride is followed by 1.08% sodium, 0.04% potassium  and a small amount of iodine.

Explanation

When sound is reflected from floor ceiling or a wall, it mixes with the original sound and change its complexion, it is called as Reverberation

Explanation

Iron oxide is a chemical compound  of oxygen and iron and is most commonly found in the earth's crust in the

form of hematite (Fe2O3). It also exists in the form of

magnetite (Fe3O4).

Explanation

The Earth's South Magnetic Pole is geographically north, and the Earth's magnetic North Pole is geographically south, so free-moving magnets are always north-south.

Explanation

The solar system is a system constrained by the gravity of the sun and the objects that orbit it. The solar system was formed 4.6 billion years ago by the gravitational collapse of a huge interstellar molecule cloud.

Explanation

The density of water depends on temperature and salt content. Density is measured as mass (g) per unit  volume (cc). Water has the highest density at 3.98 ° C and the lowest density at 0 ° C (freezing point).

Explanation

C

A total solar eclipse occurs when the Moon is exactly positioned between the Sun and the Earth and the Earth passes through the Moon's shadow. Solar eclipses can only happen during the day and at the time of a new Moon. Total solar eclipses last for only a few minutes.

while on the other hand 

During a lunar eclipse, Earth comes between the Sun and the Moon, blocking the sunlight falling on the Moon. There are two kinds of lunar eclipses: A total lunar eclipse occurs when the Moon and Sun are on opposite sides of Earth.

Explanation

Hazrat AbuBakar (R.A) was the first while Hazrat Umer (R.A) was the second caliph of Islam