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Q:

Find the area of the square whose side is equal to the diagonal of a rectangle of length 3 cm and breadth 4 cm. 

A) 25 sq.cm B) 16 sq.cm
C) 9 sq.cm D) 4 sq.cm
 
Answer & Explanation Answer: A) 25 sq.cm

Explanation:

Given length of the rectangle = 3 cm

Breadth of the rectangle = 4 cm

Then, the diagonal of the rectangle D = 32 + 42 = 25 = 5

Then, it implies side of square = 5 cm

We know that Area of square = S x S = 5 x 5 = 25 sq.cm.

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Filed Under: Area
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Q:

Find the odd one out?

6, 3, 3, 4.5, 10

A) 3 B) 4.5
C) 6 D) 10
 
Answer & Explanation Answer: D) 10

Explanation:

Here the given number series is 6, 3, 3, 4.5, 10

The odd one in the given series is 10

The pattern it follows is

6

6 x 0.5 = 3

3 x  1  = 3

3 x 1.5 = 4.5

4.5 x 2 = 9

 

Hence, the odd number is 10.

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Q:

Name a common greenhouse gas containing only hydrogen and oxygen?

A) CH4 B) O3
C) H2O D) NO
 
Answer & Explanation Answer: C) H2O

Explanation:

The common greenhouse gas containing only hydrogen and oxygen is H2O, this is water vapor.

The common greenhouse gases are water vapor, carbon dioxide, methane, nitrous oxide, and ozone.

The composition (chemical formula) of those gases are:

Water vapor: H2O
Carbon dioxide: CO2
Methane: CH4
Nitrous oxide: NO
Ozone: O3.

As you see the only one of those that contains only hydrogen and oxygen is H2O, water vapor.

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Filed Under: General Awareness
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Q:

A gland below the bladder and surrounding the urethra?

A) Prostate B) Vas deferens
C) Seminal vesicle D) Bulbourethral
 
Answer & Explanation Answer: A) Prostate

Explanation:

The prostate gland is a walnut-sized structure that is located below the urinary bladder in front of the rectum. The prostate gland contributes additional fluid to the ejaculate. Prostate fluids also help to nourish the sperm. The urethra, which carries the ejaculate to be expelled during orgasm, runs through the center of the prostate gland.

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Filed Under: Biology
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Q:

What is the main purpose of state legislatures?

A) to make and pass laws at the state level B) to control the legislation of local governments
C) to provide legislative support for Congress D) to challenge the legality of federal laws
 
Answer & Explanation Answer: A) to make and pass laws at the state level

Explanation:

Each state in the U.S. has a state legislature. The state legislatures main purpose is to make and pass laws at the state level.

 

An integral part to each state government - indeed where the people of each state are best represented - is the state legislature.

 

State legislatures are the respective representative bodies for the people of each state.
The primary responsibility of any state legislature is to design, draft, and vote on bills and laws to govern each state. Bills and laws generally go through several committees prior to being voted on in the entire assembly, through which the bills and laws are changed, amended, or killed altogether.

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Filed Under: World History
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Q:

What is the political party of the president now?

A) BJP B) INC
C) BSP D) NCP
 
Answer & Explanation Answer: A) BJP

Explanation:

Ram Nath Kovind, the present President of India is from BJP, Bharatiya Janata Party.

The president of the Republic India is the head of state of India. He is also the commander-in-chief of Indian Armed Forces. He is indirectly elected by the people through members of both houses of the parliament of India, legislative assemblies of all the states of India, the legislative assembly of the Union

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Filed Under: Indian Politics
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Q:

Each hemoglobin molecule can transport two molecules of oxygen.

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

FALSE. Each hemoglobin molecule can transport four molecules of oxygen.


 


Hemoglobin, or Hb, is a protein molecule found in red blood cells (erythrocytes) made of four subunits: two alpha subunits and two beta subunits. Heme the component of hemoglobin responsible for binding oxygen consists of an iron ion that binds oxygen and a porphyrin ring that binds the globin molecules, one molecule binds one molecule of oxygen and can bind up to four oxygen molecules.

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Subject: Biology
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Q:

Which combination of atoms can form a polar covalent bond?

A) H and Br B) H and H
C) Na and Br D) N and N
 
Answer & Explanation Answer: A) H and Br

Explanation:

Only H and Br form Polar Covalent Bond.

 

Covalent bonding:

Covalent bonding occurs when pairs of electrons are shared by atoms. Atoms will covalently bond with other atoms in order to gain more stability, which is gained by forming a full electron shell. By sharing their outer most (valence) electrons, atoms can fill up their outer electron shell and gain stability.

1. Polar Covalent Bond

2. Nonpolar Covalent Bond

 

1. Polar Covalent Bond:

A Polar Covalent Bond is created when the shared electrons between atoms are not equally shared. This occurs when one atom has a higher electronegativity than the atom it is sharing with. The atom with the higher electronegativity will have a stronger pull for electrons (Similiar to a Tug-O-War game, whoever is stronger usually wins). As a result, the shared electrons will be closer to the atom with the higher electronegativity, making it unequally shared.

 

2. Nonpolar Covalent Bond:

A Nonpolar Covalent Bond is created when atoms share their electrons equally. This usually occurs when two atoms have similar or the same electron affinity. The closer the values of their electron affinity, the stronger the attraction. This occurs in gas molecules; also known as diatomic elements. Nonpolar covalent bonds have a similar concept as polar covalent bonds; the atom with the higher electronegativity will draw away the electron from the weaker one.

 

Here H and H and N and N form Non-polar covalent bonds. Na and Br form the ionic bond.

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Filed Under: Chemistry
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