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Q:

Read the passage carefully and choose the best answer to each question out of the four alternatives and click the button corresponding to it.


Ants have been living on the earth for more than 100 million years and can be found almost anywhere on the planet. It is estimated that there are about 20000 different species of ants. For this reason ants have been called Earth's most successful species. If you watch ants for any length of time you will see that they really do communicate with each other and very effectively too. Ants communicate by touching each other with their antennae. Ants also use chemicals called pheromones to leave scent trails for other ants to follow. Ants build many different types of homes. Many ants build simple little mounds out of dirt or sand. Other ants use small sticks mixed with dirt and sand to make a stronger mound that offers protection from rain. Western Harvester ants make a small mound on top, but then tunnels up to 15 feet straight down to hibernate during winter. Ant mounds consist of many chambers connected by tunnels. Different chambers are used for nurseries, food storage, and resting places for the worker ants. Some ants live in wood like termites. Army ants don't make a home at all but travel in a large groups searching for food. Ants are social insects which means they live in large colonies or groups. Some colonies consist of millions of ants. There are three types of ants in each species, the queen, the sterile female workers and males. The male ants only serve one purpose, to mate with future queen ants and do not live very long. The queen grows to adulthood, mates, and then spends rest of her life laying eggs. A colony may have only one queen, or there may be many queens depending on the species. Ants go through four stages of development: egg, larva, pupa and adult.


Why are ants called the 'Earth's' most successful species?

A) Because they have been on earth for more than a 100 million years B) Because they can be found anywhere on earth
C) Because they have been on earth for more than a 100 million years and because they can be found anywhere on earth D) Because there are 2000 different species of ants on earth
 
Answer & Explanation Answer: C) Because they have been on earth for more than a 100 million years and because they can be found anywhere on earth

Explanation:
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Q:

Stoichiometry is based on

A) Law of conservation of energy B) Law of conservation of mass
C) Newton's 1st law D) Kepler's law
 
Answer & Explanation Answer: B) Law of conservation of mass

Explanation:

Stoichiometry is a branch of chemistry deals with the calculations on reactants and products. It is based on the Law of conservation of mass where total mass of reactants is equal to total mass of products.

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Q:

1 Mole of CO2 mass is

A) 32 gms B) 44 gms
C) 16 gms D) 12 gms
 
Answer & Explanation Answer: B) 44 gms

Explanation:

We know that,

Mass of Carbon = 12 gms

Mass of Oxygen = 16 gms = O2 => 16 * 2 = 32 gms

=> Mass of 1 mole of CO2 = 12 + 32 = 44 gms.

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Q:

A piece of land almost surrounded by water

A) island B) isthumus
C) peninsula D) strait
 
Answer & Explanation Answer: C) peninsula

Explanation:

We know that, peninsula is a piece of land that surrounded by water on three sides.  Hence, it is what A piece of land almost surrounded by water i.e, three sides water and one side land.

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Q:

What are the two kinds of Rotatory motion?

A) Spin and Vibrational motion B) Spin and Projectile motion
C) Spin and Orbital motion D) Spin and Translatory motion
 
Answer & Explanation Answer: C) Spin and Orbital motion

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Q:

Sushma Swaraj is _________ by profession.

A) Advocate B) Teacher
C) Engineer D) Doctor
 
Answer & Explanation Answer: A) Advocate

Explanation:

Other than being the politician of India, Sushma Swaraj is Advocate by profession. She was the first women chief minister of Delhi for a brief period, Second women Minister for External Affairs after Indira Gandhi.

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Q:

Which country has recorded second highest COVID19 death toll in world after China?

A) Italy B) Iran
C) India D) Japan
 
Answer & Explanation Answer: A) Italy

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Q:

In photosynthesis________

A) Light energy is converted into chemical energy B) Chemical energy is converted into Light energy
C) Chemical energy is converted into electrical energy D) Light energy is converted into Mechanical energy
 
Answer & Explanation Answer: A) Light energy is converted into chemical energy

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