Mix Test - 3

The supply of water to crops at different intervals is called Irrigation.

The time and frequency of irrigation varies from crop to crop, soil to soil and season to season.

Hence, the correct option is (B).

The main elements present In petroleum are carbon and hydrogen.

Gasoline and diesel fuel contain approximately 86 wt-% of carbon and 14 wt-% of hydrogen but the hydrogen to carbon ratio changes somewhat depending on composition.

Hence, the correct option is (C).

It was the first biosphere reserve in India established in the year 1986. 

The name ’Nilgiris’ with literary meaning ‘blue mountains’ has originated from the blue flower-clad mountains of the Nilgiris plateau within the State of Tamil Nadu. The total area of the Nilgiri Biosphere Reserve is 5,520 sq. km.

Hence, the correct option is (B).

Plant cell walls are primarily made of cellulose.

Cellulose is the most abundant macromolecule on Earth. Cellulose fibers are long, linear polymers of hundreds of glucose molecules. These fibres aggregate into bundles of about 40, which are called microfibrils.

Hence, the correct option is (A).

The most commonly used liquid fuel in our homes is kerosene.

Kerosene, paraffin, or lamp oil is a combustible hydrocarbon liquid which is derived from petroleum. It is widely used as a fuel in aviation as well as households.

Hence, the correct option is (A).

First oil well in the United States, built-in 1859 by Edwin L. Drake, Titusville, Pennsylvania. 

Oil is first discovered in the United States, when a rig near Titusville, Pennsylvania drilled 70 feet to strike oil. The well used a combination of water-based drilling mud and a steam-driven rotary drill to reach the oil and natural gas deposits. The well's success sparked an oil boom in the United States.

Hence, the correct option is (A).

Synthetic fibres are strong, durable and shining.

Synthetic polymer fabrics used in orthoses include polyester and polyamide (Nylon and Aramid). They are commonly made of wool, cotton, or blend of these natural fibers combined with nylon, acrylics or other synthetic materials.

Hence, the correct option is (D).

Infrasound can be heard by rhinoceros.

Some animals can hear infrasonic while some can hear ultrasonic sounds. Rhinocerous can hear infrasonic sounds, that means the sound below 20 Hz. 

Hence, the correct option is (C).

‘Simlipal Biosphere Niche’ is situated in Odisha.

Similipal National Park is a national park and a tiger reserve in the Mayurbhanj district in the Indian state of Odisha covering 2,750 km².

It is part of the Mayurbhanj Elephant Reserve, which includes three protected areas Similipal Tiger Reserve, Hadgarh Wildlife Sanctuary with 191.06 km², and Kuldiha Wildlife Sanctuary with 272.75 km². Simlipal National Park derives its name from the abundance of red silk cotton trees growing in the area.

Hence, the correct option is (D).

Momentum (p): The momentum of a body is the product of its mass and velocity. It is a vector quantity. The SI unit of momentum is kg.m/s.

Momentum (p) = Mass (m) × Velocity (v)

Given:

Mass =18 and Velocity = 6

Momentum (p) = m × v = 18 × 6 = 108 kg.m/s

Hence, the correct option is (A).

We hear a thunder because air beata up and explode.

Thunder is caused by the rapid expansion of the air surrounding the path of a lightning bolt. the grumbles and growls we hear in thunderstorms actually come from the rapid expansion of the air surrounding the lightning bolt.

Hence, the correct option is (B).

Nylon is not a thermosetting plastic.

Thermosetting plastic:

• It is a polymer that irreversibly becomes rigid when heated.
• Such a material is also known as a thermoset or thermosetting polymer.

Hence, the correct option is (A).

It is safe to be in building and car or bus daring a lightning.

Crouch down in a ball-like position with your head tucked and hands over your ears so that you are down low with minimal contact with the ground. Never shelter under an isolated tree. Never use a cliff or rocky overhang for shelter. Immediately get out of and away from ponds, lakes, and other bodies of water.

Hence, the correct option is (D).

An example of fossil fuel is Coal.

Fossil fuel is a generic term for non-renewable energy sources such as coal, coal products, natural gas, derived gas, crude oil, petroleum products and non-renewable wastes. These fuels originate from plants and animals that existed in the geological past (for example, millions of years ago).

Hence, the correct option is (C).

Ribosomes are membranous granular structures present in the cytoplasm.

They were first observed under an electron microscope as dense particles by George Palade in the year 1953. Ribosomes are the site for ''protein synthesis'' so they are also called the ''protein factory'' of the cell.

Hence, the correct option is (A).