0
Q:

# The process that takes place in the atom bomb is

 A) nuclear fusion B) nuclear fission C) radioactive disintegration D) chemical decomposition

Explanation:

In the atom bomb, isotopes of uranium are  disintegrated with the release of a large amount of energy. Hence, the process is nuclear fission.

Subject: Chemistry
Q:

Oxidation Number of 'S' in ${\mathbit{H}}_{\mathbf{2}}\mathbit{S}{\mathbit{O}}_{\mathbf{4}}$?

 A) +6 B) +2 C) -6 D) -2

Explanation:

In ${\mathbit{H}}_{\mathbf{2}}\mathbit{S}{\mathbit{O}}_{\mathbf{4}}$,

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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4 24
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

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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3 19
Q:

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

 A) Dimethyl ether (CH3OCH3) B) Methanol (CH3OH) C) Methane (CH4) D) None

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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4 40
Q:

Which of the following is the strongest acid?

 A) ClCH2COOH B) BrCH2COOH C) FCH2COOH D) ICH2COOH

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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5 79
Q:

How many Covalent Bonds can Nitrogen form

 A) 2 B) 3 C) 4 D) 1

Explanation:

Nitrogen (${\mathbf{N}}_{\mathbf{2}}$) 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 ${\mathbf{N}}_{\mathbf{2}}$.

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8 152
Q:

The Most Abundant Rare Gas in the Atmosphere is

 A) Xe B) He C) Ne D) Ar

Explanation:

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

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4 124
Q:

What are long chains of Carbon Molecules called

 A) Ribosomes B) Hydrocarbons C) Polymers D) None

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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5 76
Q:

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

 A) W B) Ag C) Fe D) Rh

Explanation:

W is the symbol for chemical element Tungsten or Wolfram.

It is used in making filaments of bulbs.