The earliest known acid is
nitric acid
oxalic acid
carbonic acid
acetic acid
Correct Answer :
D. acetic acid
Related Questions
Beri-beri is caused by deficiency of Vitamin
A
C
B12
B1
Which of the following process involves removal of the elements of water?
Hydrolysis
Hydrogenation
Dehydration
Dehydrogenation
The main element used in the vulcani-sation of rubber is
nickel
copper
sulphur
graphite
Which one of the following is used for dry cleaning?
Kerosene oil
Diesel oil
Lubricating oil
Petroleum ether
Mild steel contains
iron with very low percentage of carbon
iron with high percentage of carbon
iron and chromium
iron and manganese
The purest form of carbon is
animal charcoal
coal
wood charcoal
sugar charcoal
Argyrol used as eye ointment is a solution of
hydrogen peroxide
silver nitrate
tincture iodine
m-cresol
Refined petroleum is decolourised by
manganese dioxide
bauxite
animal charcoal
quicklime
Which of the following types of water gives lather easily with soap?
Hard water
Heavy water
Soft water
Both (a) and (b)
Metals are usually heavy. A light metal is
manganese
copper
potassium
plumbum
The gas evolved when ammonium nitrate is heated is
nitrogen
nitric oxide
nitrogen peroxide
nitrous oxide
Which of the following act a both u oxidising and reducing agent?
nitric acid
ammonia
nitrous acid
nitrogen peroxide
Acute diabetes patients smell of
acetone
ether
ethyl alcohol
methyl alcohol
Mortar contains cement and sand in the ratio of
1 : 1
1 : 2
2 : 3
1 : 3
A valuable by-product in the manufacture of soap is
stearic acid
sodium hydroxide
palmitic acid
glycerol
In photography, the compound or nitrogen used is
Potassium nitrate
Silver nitrate
Ammonium carbonate
Ammonium bicarbonate
White vitriol is
ZnSO4 . 7H2O
FeSO4 . 7H2O
MgSO4 . 7H2O
CaSO4 . 2H2O
A non-metal which is a good conductor or heat and electricity is
iodine
sulphur
graphite
phosphorus
Which of the following is a Bleaching agent?
Potassium chlorate
Hydrogen peroxide
Copper sulphate
Silver Nitrate
Optical instruments are made of
pyrex glass
flint glass
quartz glass
Crooke's glass
Which of the following statements regarding natural radioactivity is true?
It is spontaneous disintegration of atoms
It is induced by bombardment with projectiles
It is transmutation of atoms with projectiles
It is dependent on temperature
Which of the following carbon compounds is used as a fire extinguisher?
Carbon disulphide
Chloroform
Carbon tetrachloride
Methylene chloride
Which one of the following is not radioactive?
Astatine
Francium
Tritium
Zirconium
Which of the following is a communicable disease caused by viruses?
Cholera
Dysentery
Diabetes
Measles
The non-metal which is electropositive is
chlorine
nitrogen
sulphur
hydrogen
Isotopes differ in the number of
Protons
Neutrons
Electrons
Protons and electrons
Which of the following is not a chemical change?
Burning of magnesium ribbon in air
Distillation of water
Heating of cane sugar
Setting of cement
Rooms in places infected by plague are disinfected using
bleaching powder
iodoform
sulphur dioxide
chlorine
The most abundant noble gas present in air is
neon
argon
helium
krypton
The principle involved in dialysis, a treatment administered to patients with affected kidneys is
Cataphoresis
Osmosis
Dehydration
Diffusion