Jeweller's rouge is
magnetic oxide of iron
ferric oxide
ferrous oxide
ferrous carbonate
Correct Answer :
B. ferric oxide
Related Questions
Plastics are synthetic
rubbers
fibres
resins
sugars
Which one of the following is not radioactive?
Astatine
Francium
Tritium
Zirconium
Which of the following biology laboratory?
Phenol
Benzaldehyde
Formaldehyde
Acetic acid
Carbogen is used in
CO2 poisoning
CO poisoning
phosgene poisoning
anesthesia
Gold dissolves in aqua regia due to the formation of
chloro auric acid
auric chloride
gold nitrate
aurous chloride
Which of the following is not a supporter of combustion?
Oxygen
Air
Hydrogen
Chlorine
In addition to nitric acid, another acid which may render iron passive is
acetic acid
oxalic acid
chromic acid
citric acid
The modern system of symbols was evolved by
Dalton
Cavendish
Avogadro
Berzelius
Calomel is
lead chloride
mercurous chloride
mercuric chloride
calcium sulphate
Which of the following is an essential constituent of acids?
Oxygen
Nitrogen
Hydrogen
Chlorine
Real gases tend to become ideal Under
low pressure and high temperature
low pressure and low temperature
high pressure and low temperature
high pressure and high temperature
The function of nitrogen in air is
to make air a moderate supporter of combustion
to maintain the density of air constant
to prevent the hydrogen in air from exploding
to reduce the poisonous nature of ozone in air
When ants bite, they inject
glacial acetic acid
methanol
formic acid
stearic acid
Clark's method for removal of temporary hardness in water uses
calcium hydroxide
washing soda
calcium chloride
zeolite
Radium was isolated from
galena
dolomite
sylvine
pitchblende
Argyrol used as eye ointment is a solution of
hydrogen peroxide
silver nitrate
tincture iodine
m-cresol
Deficiency of iron causes
nervous disorders
heart diseases
anaemia
impairment of vision
Marsh gas is
ethane
ethylene
acetylene
methane
Heavy water was discovered by
TW Richards
FW Aston
Stas
Urey
Which of the following is not a physical change?
Distillation of water
Action of heat on potassium chlorate
Powdering of glass
Burning of an electric lamp
The process of heating steel to bright red heat and cooling suddenly by plunging it into water is known as
annealing
hardening
quenching
tempering
Riboflavin deficiency causes
tongue inflammation
pellagra
night blindness
anaemia
The Combined Gas Law equation is
P1V1T1 = P2 V2 T2
P1V1T2 = P2V2T1
P = P1 + P2 + P3
C =
Hypo' is
sodium nitrate
Potassium nitrate
sodium thiosulphate
ammonium chloride
Penicillin was discovered by
Alexander Fleming
Sir JJ Thomson
Dr Nessler
Sir John Russel
A metal which exhibits allotropy is
cobalt
tin
manganese
platinum
Vinegar is an aqueous solution of
oxalic acid
citric acid
acetic acid
hydrochloric acid
Which among the following is a solid non-metal?
chlorine
mercury
water
iodine
The human body contains about
50% water
10% water
70% water
20% water
In the common soda-acid fire extinguisher, the fire is put out by
acid fumes
sodium bicarbonate
carbon dioxide
sodium carbonate