7000+ TNPSC Physics & Chemistry Previous Year Question Papers Pdf - 1

Question: 1

Aquaregia is a mixture of

(A) Hydrochloric acid and nitric acid

(B) Hydrochloric acid and formic acid

(C) Nitric acid and acetic acid

(D) Nitric acid and sulphuric acid

Question: 2

Potash alum is a mixture of

(A) Potassium sulphate and magnesium sulphate

(B) Potassium sulphate and copper sulphate

(C) Potassium and aluminium

(D) Potassium sulphate and aluminium sulphate

Question: 3

The base which ionize completely in aqueous solution

(A) NaOH

(B) Ca(OH)₂

(C) Mg(OH)₂

(D) NH₄ OH

Question: 4

_____ is used in fire extinguishers.

(A) Calcium carbonate

(B) Calcium oxychlroide

(C) Sodium bicarbonate

(D) Sodium carbonate

Question: 5

The antibiotic Penicillin is obtained from

(A) Antiseptic

(B) Microorganism

(C) Sunlight

(D) Plant