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Q:

Atoms of the same element can differ in

A) Atomic number B) Atomic mass
C) electrons D) None of the above
 
Answer & Explanation Answer: B) Atomic mass

Explanation:

Atoms of the same element can have same atomic number and number of electrons since, the atomic number is the number of protons and the number of protons and eectrons are the same in an element.

 

Hence, the atoms of the same element may differ in their atomic mass since it depends on the number of neutrons it holds and such atoms are called isotopes.

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Filed Under: Chemistry
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Q:

What travels around the world but stays in one corner?

A) slippers B) walking stick
C) broom stick D) stamp
 
Answer & Explanation Answer: D) stamp

Explanation:

A postage stamp on the letters, parcels, ... for post will be on the corner of the post but it travels around the world to any address we want send that.

what_travels_around_the_world_but_stays_in_one_corner1536045648.jpg image

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Filed Under: Word Puzzles
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Q:

What reacts with oxygen to produce rust?

A) Aluminium B) Silver
C) Copper D) Iron
 
Answer & Explanation Answer: D) Iron

Explanation:

Iron reacts with oxygen in the presence of moisture or water to form a red oxide called rust and the reaction involved is called as Redox reaction.

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Filed Under: General Science
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Q:

Where does hydroelectric energy come from?

A) Air B) Water
C) Solar D) All of the above
 
Answer & Explanation Answer: B) Water

Explanation:

Hydroelectricity is electricity produced from hydropower i.e, water.

Where_does_hydroelectric_energy_come_from1536043070.jpg image

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Filed Under: Physics
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Q:

What was one way progressives differed from populists?

Answer

The one way how the progressives differed from populists is the populists are almost farmers whereas the progressives are typicaly middle class people who lives in the cities.

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Subject: Indian History Exam Prep: AIEEE , Bank Exams , CAT
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Q:

Which of the following includes all the others?

A) Cellulose B) Glucose
C) Sucrose D) Glycogen
 
Answer & Explanation Answer: B) Glucose

Explanation:

Here cellulose, sucrose and glycogen are all the forms of glucose. Hence, glucose includes all the other three given options.

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Filed Under: General Science
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Q:

Which formula represents a molecular compound?

A) Ar B) NaI
C) N2O4 D) All of the above
 
Answer & Explanation Answer: C) N2O4

Explanation:

Molecular compounds are those with covalent bonds between the elements and those elements are typically non metals.

 

Here in the given options, Ar is an element. NaI has an ionic bond. Hence, N2O4 has a covalent bond between the two non metals and is a molecular compound.

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Filed Under: Chemistry
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Q:

Select the correct statement about the process of scientific inquiry.

A) The goal of scientific research is to prove the stated hypothesis. B) It is possible to test hypotheses, such as those involving historical events, without conducting experiments.
C) If the results of an experiment do not support the hypothesis that is tested, the experiment is badly designed. D) All of the above
 
Answer & Explanation Answer: B) It is possible to test hypotheses, such as those involving historical events, without conducting experiments.

Explanation:

The correct statement among the given options about the process of scientific inquiry is "It is possible to test hypotheses, such as those involving historical events, without conducting experiments."

 

Although it is not possible to carry out experiments to test hypotheses about evolutionary relationships between living groups or about the timing of the origin of major evolutionary innovations, such hypotheses can be evaluated by making predictions about the expected findings that would result from these hypotheses. Data can then be collected to test whether these predictions are correct.

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Filed Under: General Science
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