Chemistry Questions

Q:

When Ionic bonds are formed metallic atoms tend to

A) share electrons B) gain electrons
C) lose electrons D) None of above
 
Answer & Explanation Answer: C) lose electrons

Explanation:

Ionic bonding is the complete transfer of valence electron(s) between atoms. It is a type of chemical bond that generates two oppositely charged ions. In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.

 

Hence, when Ionic bonds are formed metallic atoms tend to lose electrons and become positive ions

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Q:

The luster of a metal is due to presence of free electrons.

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

Explanation:

True, The luster of a metal is due to presence of free electrons. Luster means shine or soft glow. We know that metals have the quality of reflecting light from its surface.

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Q:

The most electronegative element among the following is

A) Oxygen B) Chlorine
C) Nitrogen D) Sodium
 
Answer & Explanation Answer: A) Oxygen

Explanation:

Electronegativity measures an element's ability to form chemical bonds. Helium is the most electronegative element followed by Fluorine.

 

Here in the given options, Oxygen is the most electronegative element. Fluorine is followed by Oxygen, Chlorine and Nitrogen is the most electronegative elements list.

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Q:

Which of the following elements is a metalloid?

A) arsenic B) boron
C) antimony D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

A metalloid is any chemical element which has properties in between those of metals and nonmetals, or that has a mixture of them.

The six commonly recognised metalloids are

boron,

silicon,

germanium,

arsenic,

antimony, and

tellurium.

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Q:

Which one is not the isotopes of hydrogen

A) Protium B) Deuter
C) Tritium D) All
 
Answer & Explanation Answer: C) Tritium

Explanation:
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Q:

What is the main ingredient in face powder?

A) Calcium carbonate B) Talc
C) Magnesium carbonate D) China clay
 
Answer & Explanation Answer: B) Talc

Explanation:

Talc or talcum is a clay mineral composed of hydrated magnesium silicate with the chemical formula H2Mg3(SiO3)4 is the main ingredient in face powders that absorbs moisture and oil.

 

It is also called as French Chalk. Other ingredients include Calcium carbonate (chalk), Magnesium carbonate, China clay, starches like rice and potato, zinc oxide,...

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Q:

What element is found in all organic compounds?

A) Hydrogen B) Calcium
C) Nitrogen D) Carbon
 
Answer & Explanation Answer: D) Carbon

Explanation:

Carbon is found in all organic compounds.

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Q:

What type of Lipid is Estrogen?

A) phospholipid B) steroid
C) wax D) triglyceride
 
Answer & Explanation Answer: B) steroid

Explanation:

Estrogen is a group of steroid hormone that control the development and maintenance of an individuals feminine characteristics. Natural estrogen exists in men as well as women and are found in higher amounts in women Especially in those of reproductive age.

 

Estrogens are hormones which are responsible to the body functions of the female body system such as menstruation, development of the female body such as pubic hair, breasts and development of the proportions of the body.

 

Lipids act as best energy storage molecules as the cleavage of fatty acids produces both energy and metabolic water which is a main component in almost all lipids.

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