41)

Onions produce the chemical irritant known as syn-propanethial-S-oxide; this stimulates the eyes' ______ glands which release tears.

SSC CHSL 2021

A)

parotid

B)

lachrymal

C)

submandibular

D)

sublingual

42)

What is the molecular formula for hydrochloric acid?

SSC CHSL 2021

A)

H₂SO₄

B)

HCl

C)

KOH

D)

HNO₃

43)

Chemicals called ______ link to form proteins.

SSC CHSL 2021

A)

citric acids

B)

oxalic acids

C)

nitric acids

D)

amino acids

44)

Which of the following has a tetragonal crystal system?

SSC CHSL 2021

A)

Potassium nitrate

B)

Cadmium sulphide

C)

Calcium sulphate

D)

Zinc oxide

45)

Which of the following cells is NOT used in watches?

SSC CHSL 2021

A)

Zinc air cell

B)

Silver oxide cell

C)

Lead acid cell

D)

Mercury cell

46)

Which of the following quantities is measured using a torsion balance?

SSC CHSL 2021

A)

Magnetism

B)

Force

C)

Charge

D)

Pressure

47)

India's first lithium refinery, which will process lithium ore to produce battery-grade material, will be set up in:

SSC CHSL 2021

A)

Madhya Pradesh

B)

Uttar Pradesh

C)

Rajasthan

D)

Gujarat

48)

‘PVC’ is a high strength thermoplastic material widely used in applications, such as pipes, medical devices, wire and cable insulation. What is the full form of PVC?

SSC CHSL 2021

A)

Polyvinyl Carbazole

B)

Polyvinyl Carbonate

C)

Polyvinyl Calcium

D)

Polyvinyl Chloride

49)

What is the pH value of acidic substances?

SSC CHSL 2021

A)

Below 1.0

B)

Below 2.0

C)

Below 7.0

D)

Below 4.0

50)

 ______ is a process of forming a thick oxide layer of aluminium.

SSC CHSL 2021

A)

Ductility

B)

Galvanisation

C)

Anodising

D)

Corrosion