1)

Which of the following pigments causes the red colour in onions?

SSC CHSL 2021

A)

Carotenoids

B)

Anthocyanins

C)

Chlorophylls

D)

Betalains

2)

Which of the following chemicals is responsible for the yellow colour in urine?

SSC CHSL 2021

A)

Albumin

B)

Urobilin

C)

Bilirubin

D)

Creatinine

3)

Which chemical reaction takes place during the cooking of meat?

SSC CHSL 2021

A)

The Gattermann reaction

B)

The Maillard reaction

C)

The Swartz reaction

D)

The Finkelstein reaction

4)

Which one of the following is NOT a halogen element?

SSC CHSL 2021

A)

Iodine

B)

Selenium

C)

Fluorine

D)

Astatine

5)

Alkali metals react vigorously with cold water resulting in the displacement of ___________.

SSC CHSL 2021

A)

hydrogen

B)

oxygen

C)

carbon dioxide

D)

nitrogen

6)

Which of the following metals reacts with the moist carbon dioxide in the air and slowly loses its shiny brown surface and gains a green coat?

SSC CHSL 2021

A)

Silver

B)

Zinc

C)

Iron

D)

Copper

7)

Which of the following is a weak electrolyte?

SSC CHSL 2021

A)

Calcium chloride

B)

Sodium chloride

C)

Ethanoic acid

D)

Magnesium sulphate

8)

Amino acids are often referred to as the building blocks of _______.

SSC CHSL 2021

A)

sugar

B)

carbohydrates

C)

fats

D)

proteins

9)

Primarily, an ant’s sting has which of the following?

SSC CHSL 2021

A)

Magnesium hydroxide

B)

Tartaric acid

C)

Citric acid

D)

Formic acid

10)

Who among the following is considered as the ‘Father of Modern Atomic Theory’?

SSC CHSL 2021

A)

Willard Gibbs

B)

Otto Hahn

C)

John Dalton

D)

Robert Boyle