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Q:

Which is a pair of allotropes?

A) carbon-16 and carbon-12 B) diamond and graphite
C) carbon dioxide and graphite D) diamond and carbon dioxide
 
Answer & Explanation Answer: B) diamond and graphite

Explanation:

Allotropes are the different physical forms of an element. Here in the given options, diamond and graphite are the pair of allotropes of carbon.

 

Some more examples are Molecular oxygen and ozone are pair of allotropes, Black and red phosphorous are also pairs of allotropes.

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Filed Under: Chemistry
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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:

Which is required for karst topography to form?

A) Limestone B) Sinkholes
C) Both A & B D) Rain
 
Answer & Explanation Answer: C) Both A & B

Explanation:

Karst topography is a landscape formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum.

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Filed Under: Indian Geography
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Q:

Which of the following is an example of parasitism?

A) Leeches consume blood of their host B) Ticks that live on dogs
C) Aphid insects eat the sap of the host plant D) All of the above
 
Answer & Explanation Answer: D) All of the above

Explanation:

The relationship between two organisms such that one lives on the other and one gets benefited while the other get infected.

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Filed Under: Biology
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Q:

What's at the end of a rainbow?

Answer

The letter 'W' is at the end of a rainbow.

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Subject: Logic Puzzles Exam Prep: AIEEE , Bank Exams , CAT , GATE
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Q:

Isotopes are atoms of the same element that have different

A) mass numbers B) atomic numbers
C) protons D) All of the above
 
Answer & Explanation Answer: A) mass numbers

Explanation:

Isotopes are atoms of the same element that have different mass numbers.

Example : Hydrogen, Deutirium and tritium all these have different mass but same atomic numbers.

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Filed Under: Chemistry
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Q:

XML preserves white spaces.

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

Explanation:

True, the given statement that xml preserves white spaces is correct.

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Subject: Application Development
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Q:

Which of the following statements about taxes is false?

A) Some states don’t collect income tax B) Taxes at the local, state and federal level are all equal
C) Taxes are collected at the local, state and federal level D) Some states don’t collect sales tax
 
Answer & Explanation Answer: A) Some states don’t collect income tax

Explanation:
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Filed Under: Indian Economy
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