Glass articles are annealed so that
they may appear better
they can resist the action of acids and alkalies
they lose their brittleness
they can withstand temperature shocks
Correct Answer :
C. they lose their brittleness
Related Questions
Water has an unusually high bolling point because
its molecular weight is low
it is denser than ice
it is a good solvent for many ionic substances
the molecules of water are joined by hydrogen bonds
The compound used in photography is
ammonium dichromate
copper Sulphate
magnesium Sulphate
sodium thiosulphate
Vinegar is the trade name for
chloroform
acetic acid
phenol
carbon tetrachloride
Consider the following statements: Hard water is not suitable for
1) drinking
2) washing clothes with soap
3) use in boilers
4) irrigating crops
Which of these statements are correct?
1 and 3
2 and 3
1, 2 and 4
1, 2, 3 and 4
Which one of the following is not radioactive?
Astatine
Francium
Tritium
Zirconium
Argyrol used as eye ointment is a solution of
hydrogen peroxide
silver nitrate
tincture iodine
m-cresol
The simplest hydrocarbon is
benzene
methane
ethane
butane
Which one of the following is present in the largest amount in terms of per cent by mass in the earth's crust?
Silicon
Oxygen
Carbon
Calcium
A common rodenticide is (Rat Poison)
malathion
parathion
zinc phosphide
diuron
A metal which exhibits allotropy is
cobalt
tin
manganese
platinum
White lead is
a basic salt
an acid salt
a double salt
a normal salt
The discoverer of chloroform was
Liebig
Pasteur
Bunsen
Erlenmeyer
Leakage in Liquefied Petroleum Gas (LPG) cylinders is easily detected by adding
mercaptans
propylene
carbon disulphide
phosgene
LSD is
an anaesthetic
a psychedelic drug
an antipyretic
an antibiotic
The rate of setting of cement is slowed down by the addition of
quicklime
gypsum
soda lime
bleaching powder
Washing soda is
sodium hydroxide
sodium carbonate
sodium bicarbonate
potassium chloride
The soaps used in shaving cream are
calcium soaps
lead soaps
soft soaps
hard soaps
Fructose is also called
dextrose
fruit sugar
beet sugar
blood sugar
The Long Form of the Periodic Table is based on
atomic number
valency
atomic mass
atomic radius
An essential condition for rusting is
high temperature
light
moisture
dry air
Heavy water was discovered by
TW Richards
FW Aston
Stas
Urey
When ants bite, they inject
glacial acetic acid
methanol
formic acid
stearic acid
Glass is a ______ mixture of metallic ______.
homogeneous, sulphates
heterogeneous, nitrates
heterogeneous, carbonates
homogeneous, silicates
Graphite la a good conductor of electricity because
it is an allotrope of carbon
it gives CO2 on heating
it contains free electrons
it is oxidised to graphitic acid
In the making of jewels, gold is usually mixed with
zinc
tin
copper
aluminium
The artificial silk produced from cellulose is
Polyethylene
Nylon
Terylene
Rayon
Which of the following is a Bleaching agent?
Potassium chlorate
Hydrogen peroxide
Copper sulphate
Silver Nitrate
Invert sugar is
sucrose
glucose
fructose
a mixture of glucose and fructose
On chemical analysis, a bottle cork is found to contain primarily
proteins
carbohydrates
tannins
lipids
Boiler scales' contain
calcium carbonate
magnesium bicarbonate
calcium sulphate
magnesium sulphate