Questions

Q:

An alloy is

A) a compound B) an allotropic form
C) an isomer D) a mixture
 
Answer & Explanation Answer: D) a mixture

Explanation:
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Q:

Intermolecular forces in HCl are

A) Hydrogen bonding B) Dipole-dipole
C) Dispersion force D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

Intermolecular forces :

The forces of attraction present in between the molecules or atoms or compounds is termed as intermolecular forces.


The molecule HCl is composed of hydrogen and chlorine atom. There is high difference in electronegativities therefore, it is polar in nature. The H end of HCl is permanently slightly positive charge. The Cl end of HCl has a permanent slight negative charge. the "H" in one molecule is attracted to the "Cl" in a neighbor. The intermolecular force is weak compared to a covalent bond. But this dipole-dipole interaction is one of the stronger intermolecular attractions.

It also has hydrogen bonding and dispersion forces. 

Dispersion forces are the weakest forces which are present in between all molecules or atoms.
Hydrogen bonds are present in molecules having at least one H-A bond where A is the strong electronegative atom (mainly F, Cl and N).

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Q:

The element common to all acids is

A) Hydrogen B) Oxygen
C) carbon D) Sulphur
 
Answer & Explanation Answer: A) Hydrogen

Explanation:

Hydrogen is the common element in all acids.

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Q:

A convex mirror is used to form an image of a real object. The image

A) is diminished in size B) is erect
C) always lies between the pole and the focus D) all of the above
 
Answer & Explanation Answer: D) all of the above

Explanation:
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Q:

Which one of the following groups have quantities that do not have the same dimensions

A) pressure, stress B) velocity, speed
C) force, impulse D) work, energy
 
Answer & Explanation Answer: C) force, impulse

Explanation:
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Q:

What is the time taken by the Earth to complete one rotation on its imaginary axis

A) 24 hr 37 min 23 sec B) 24 hr
C) 23 hr 56 min 4 sec D) 23 hr 52 min
 
Answer & Explanation Answer: C) 23 hr 56 min 4 sec

Explanation:
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Q:

Most bacteria reproduce by

A) budding B) binary fission
C) fragmentation D) mitosis
 
Answer & Explanation Answer: B) binary fission

Explanation:

Most bacteria is reproduce by binary fission.

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Q:

Who is known as "Iron Lady of India"? 

A) Rani Laxmi Bai B) Sonia Gandhi
C) Indira Gandhi D) None of the above
 
Answer & Explanation Answer: C) Indira Gandhi

Explanation:

Indira Gandhi the first Prime Minister of India is known as the Iron Lady of India.

Who_is_known_as_Iron_Lady_of_India1542609309.jpg image

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