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Q:

In photography, the compound of nitrogen used is 

A) Potassium nitrate B) Silver nitrate
C) Ammonium carbonate D) Ammonium bicarbonate

Answer:   B) Silver nitrate



Explanation:

Silver nitrate is the basic substance from which silver bromide is obtained. The photographic films are impregnated with the light sensitive AgBr.

Subject: Chemistry
Q:

Which of the following is the strongest acid?

A) ClCH2COOH B) BrCH2COOH
C) FCH2COOH D) ICH2COOH
 
Answer & Explanation Answer: C) FCH2COOH

Explanation:

FCH2COOH is the strongest acid out of all .Since the electron withdrawing inductive effect (-I effect) of the halogens decreases in the order

 

F>Cl> Br> I , therefore the acidic strength of the α- halo acids decreases in the same order.

 

FCH2COOH  >  ClCH2COOH   >   BrCH2COOH   >   ICH2COOH.

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Q:

How many Covalent Bonds can Nitrogen form

A) 2 B) 3
C) 4 D) 1
 
Answer & Explanation Answer: B) 3

Explanation:

Nitrogen (N2) forms Three Covalent Bonds to become stable.

 

Here the Atmomic Number of Nitrogen is 7. Because there are 2 electrons in the first orbital and 5 in the second and you still have space for 3 more. So it shares, 3 to get the stable octet. Therefore, there are 3 covalent bonds in N2.

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Q:

The Most Abundant Rare Gas in the Atmosphere is

A) Xe B) He
C) Ne D) Ar
 
Answer & Explanation Answer: D) Ar

Explanation:

Argon is most the most abundant Rare Gas in the atmosphere. Its elemental symbol is Ar. 

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Q:

What are long chains of Carbon Molecules called

A) Ribosomes B) Hydrocarbons
C) Polymers D) None
 
Answer & Explanation Answer: C) Polymers

Explanation:

A small organic molecule (sugars or amino acids), several of which may be bonded together to form a chain called a polymer.

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Q:

Which of the following metal is generally used for making filaments of bulb?

A) W B) Ag
C) Fe D) Rh
 
Answer & Explanation Answer: A) W

Explanation:

W is the symbol for chemical element Tungsten or Wolfram.

It is used in making filaments of bulbs.

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Q:

The Gas used for Artificial Ripening of Green Fruit is

A) Acetone B) Di Carbonate
C) Ethylene D) Ethyl Alcohol
 
Answer & Explanation Answer: C) Ethylene

Explanation:

Ethylene is used for Artificial Ripening of Green Fruit.

    • Calcium carbide is also used in some countries for artificially ripening fruit. When calcium carbide comes in contact with moisture, it produces acetylene gas, which is quite similar in its effects to the natural ripening agent, ethylene

 

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Q:

The Most Important Ore of Aluminium is

A) Calamine B) Monazite
C) Magnetite D) Bauxite
 
Answer & Explanation Answer: D) Bauxite

Explanation:
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Q:

Atoms Are Composed Of

A) Electrons and Protons B) Protons and Nuclei
C) Only Electrons D) Electrons and Nuclei
 
Answer & Explanation Answer: D) Electrons and Nuclei

Explanation:

Atoms are composed of Electrons, protons and Neutrons. Protons and Neutrons together called as Nuclei.

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