131)

What is the correct statement related to Avogadro?

SSC CGL 2022

A)

Avogadro discovered a difference between animal and plant cell.

B)

Avogadro made a distinction between electrons and neutrons.

C)

Avogadro discovered electrons.

D)

Avogadro made a distinction between atoms and molecules.

132)

Name an alkylbenzene widely used as a chemical intermediate in the production of phenol.

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A)

Styrene

B)

Furan

C)

Cumene

D)

Toluene

133)

The mass number of titanium is:

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A)

41.33

B)

49.82

C)

44.56

D)

47.78

134)

In which year did AEB de Chancourtois organize the elements by atomic weight, by graphing the elements around a cylinder with a circumference of 16 units, corresponding to the weight of oxygen (O)?

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A)

1870

B)

1860

C)

1862

D)

1868

135)

Which of the following is known as ‘Plaster of Paris’?

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A)

2MgSO4⋅7H2​O

B)

2MgSO4⋅H2​O

C)

2CaSO₄⋅2H₂O

D)

2CaSO4⋅H2O

136)

When a magnesium ribbon is burnt in oxygen, it gets converted to ______.

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A)

magnesium carbonate

B)

magnesium hydroxide

C)

magnesium peroxide

D)

magnesium oxide

137)

What is the suffix for -OH group according to IUPAC?

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A)

-one

B)

-ene

C)

-ols

D)

-anes

138)

What is the chemical formula of vinegar?

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A)

(COOH)₂

B)

CH3COOH

C)

HCOOH

D)

C₆H₅COOH