3
Q:

A bond formed by the transfer of electrons between atoms of the elements is called

A) Ionic bond B) Covalent bond
C) Co-ordinate bond D) Hydrogen bond

Answer:   A) Ionic bond



Explanation:
Subject: Chemistry
Q:

What is the IUPAC name for the following compound?

 

H3C-CC-H

A) Acetylene B) Methyl acetylene
C) Butanol D) Decanoic Acid
 
Answer & Explanation Answer: B) Methyl acetylene

Explanation:

The IUPAC name of the compound is Methyl Acetylene or Propyne.

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Q:

Oxidation Number of 'S' in H2SO4?

A) +6 B) +2
C) -6 D) -2
 
Answer & Explanation Answer: A) +6

Explanation:

In H2SO4,

Hydrogen has a charge of +2, with each hydrogen has +1.

Oxygen has  a charge of -8, with each oxugen has -2.

Total charge = (2 - 8) = -6

Therefore, the Oxidation number of Sulphur S is '+6' because to make the compound stable.

 

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5 26
Q:

Which of the following describes the process of glycolysis?

A) It represents the first stage in the chemical oxidation of glucose by a cell. B) Breakdown of Glucose
C) Converts Glucose to Pyruvate D) All the above
 
Answer & Explanation Answer: D) All the above

Explanation:

Glycolysis is the chemical process that converts glucose C₆H₁₂O₆, into Pyruvate, CH₃COCOO− + H⁺.

 

      • The free energy released in this process is used to form the high-energy molecules ATP and NADH.
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Q:

Which of the following chemical compounds has the highest boiling point?

A) Dimethyl ether (CH3OCH3) B) Methanol (CH3OH)
C) Methane (CH4) D) None
 
Answer & Explanation Answer: B) Methanol (CH3OH)

Explanation:

Chemical Compounds with stronger intermolecular forces have higher boiling points.

 

The order of strengths of intermolecular forces is:

 London dispersion < dipole-dipole < H-bonding

 

Methane (CH4) — London dispersion forces

Dimethyl ether (CH3OCH3) — dipole-dipole attractions

Methanol (CH3OH) — hydrogen bonding

Therefore, Methanol - CH3OH with H-Bonding have highest Boiling Point among the given chemical compounds.

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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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8 152
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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4 126
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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