Questions

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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Filed Under: Chemistry
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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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Filed Under: English
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Q:

Missing letters puzzle

Answer

Answer:  4


Explanation:   Splitting the diagram in half horizontally and vertically, each quarter contains the alphabet written in sequence, with the relative position of this sequence rotating 1/4 turn anti-clockwise as you move clockwise around the quarters.

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Q:

Which one of the following is not correct about Sargasso Sea?

A) It is characterized with anticyclonic circulation of ocean currents B) It records the highest salinity in Atlantic Ocean
C) It is located west ofGulf Stream and east of Canary Current D) It confined in gyre of calm and motionless water
 
Answer & Explanation Answer: A) It is characterized with anticyclonic circulation of ocean currents

Explanation:

The calm centre of the anticyclonic gyre in the North Atlantic, comprising a large eddy of surface water, the boundaries of which are demarcated by major current systems such as the Gulf Stream, Canaries Current, and North Atlantic Drift. The Sargasso Sea is a large, warm (18°C), saline, which is characterized by an abundance of floating brown seaweed (Sargassum).

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Filed Under: General Awareness
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Q:

Which must be true for metamorphism to occur?

A) The grain size must become smaller B) The process must take place underwater
C) The parent rock must be in solid form D) The parent rock must be igneous
 
Answer & Explanation Answer: C) The parent rock must be in solid form

Explanation:

Metamorphism is the method of changing the structure of a rock by using heat and temperature.

Hence, for this to happen the parent rock must be in solid form only. Therefore, option C) is true.

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Filed Under: Physics
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Q:

Every hot object emits _________________

A) X -­ rays B) Visible light
C) Infrared rays D) Ultraviolet rays
 
Answer & Explanation Answer: C) Infrared rays

Explanation:
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Filed Under: Physics
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Q:

In which country the hormone gibberellin was discovered?

A) India B) Japan
C) China D) Russia
 
Answer & Explanation Answer: B) Japan

Explanation:

The hormone gibberellin was discovered in the country Japan.

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Filed Under: Inventions
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Q:

I have four wings, but cannot fly, I never laugh and never cry; On the same spot I'm always found, toiling away with little sound.

 What am I?

Answer

A Windmill.

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