General Knowledge Questions

Q:

Which compound contains ionic bonds?

A) CaO B) CO2
C) NO2 D) NO
 
Answer & Explanation Answer: A) CaO

Explanation:

An ionic bond is a chemical bond between two atoms in which one atom seems to donate its electron to another atom.

 

Here in the given compounds, the compound that contains ionic bond is CaO, Calcium oxide.

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Q:

What is the relationship between Resistivity and Conductivity?

Answer

Resistivity :


Resistivity is a measure of the resistance to the flow of electrons. 


Conductivity :


Conductivity is just the inverse of resistivity, σ = 1/ρ, where σ is conductivity and ρ is resistivity.


 


Example:


Think of a pipe and water, the bigger the pipe, the easier water can flow and thus the lower the resistance. 

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Q:

Which subatomic particle has no charge?

A) electron B) neutron
C) proton D) All of the above
 
Answer & Explanation Answer: B) neutron

Explanation:

An atom is composed of three subatomic particles. They are ::

 

1) Electron (-vely charged particle)

2) Proton (+vely charged particle)

3) Neutron (No charge particle)

 

Hence, Neutron is the subatomic particle which has no charge.

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Q:

Consider the electromagnetic radiations having wavelengths 200 nm, 500 nm and 1000 nm. Which wavelength (s) of the following can make visual sensation to a human eye?

A) 200 nm and 500 nm B) 500 nm and 1000 nm
C) 500 nm only D) 200 nm and 1000 nm
 
Answer & Explanation Answer: C) 500 nm only

Explanation:
Visual image of human eye is 390-700 nanometer. So, approximate value is 500 nanometer only.
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Q:

Two metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes

 

A) 2R B) R/2
C) 5R/4 D) 3R/4
 
Answer & Explanation Answer: C) 5R/4

Explanation:

So, resistance of Wire 2 is R/4 as radius is half of wire 1, so area would be 4 times of wire 1.

Now for resistance in series. R= R1 + R2.

Therefore, Final R= R + R/4 = 5R/4

 

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Q:

Which datatype in c language has least storage?

A) char B) double
C) int D) float
 
Answer & Explanation Answer: A) char

Explanation:

Data types are used for declaration of variables in computer programming languages. These determine the type and size of data associated with variables.

Data types examples - int, char, float, etc...

 

char datatype is the least storage data type with 1 byte.

int with 2 or 4 bytes.

float with 4 bytes

double with 8 bytes.

datatype_in_c_language_has_least_storage1562156854.png image

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Q:

What is one map unit equivalent to

A) 1% recombination frequency B) the distance between a pair of homologous chromosomes
C) Both A & B D) 1 nanometer of distance between two genes
 
Answer & Explanation Answer: A) 1% recombination frequency

Explanation:

The distance between two genes is measured with a unit called map unit. One map unit is equivalent to 1% recombination frequency.

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Q:

What are the followers of Judaism called?

A) Jews B) Judais
C) Sakhs D) Sikhs
 
Answer & Explanation Answer: A) Jews

Explanation:

Judaism is the world's oldest monotheistic religion with the belief in one God. The followers of Judaism are called Jews.

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