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Quiz 18
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Q.1
Heavy metals got their name because compared to other atoms they have
Higher densities
Higher atomic masses
Higher atomic numbers
Higher atomic radii
Q.2
Which one of the following elements exhibits the greatest tendency to lose electrons ?
Fluorine
Lithium
Oxygen
Zinc
Q.3
Which of the following metals causes Itai-Itai disease ?
Cadmium
Chromium
Cobalt
Copper
Q.4
Molasses a by-product in the manufacture of sugar, is converted into
Alcohol
Paper
Fuel
Pulp
Q.5
Denatured spirit is ethanol mixed with
Petrol
Kerosene
Water
Pyridine
Q.6
Which of the following caused radioactive pollution along the coast of Kerala ?
Plutonium
Zinc
Thorium
Radium
Q.7
Which of the following is used as a preservative to protect processed food?
Sodium sulphate
Saccharin
BHT
Sodium metabisulphite
Q.8
Chemical composition of cement is
Limestone and Clay
Limestone, Clay and Gypsum
Limestone and Gypsum
Clay and Gypsum
Q.9
Cement is made hard with
Dehydration
Hydration and dissociation of water
Dissociation of water
Polymerisation
Q.10
'Plaster of Paris' is made by partial dehydration of
Epsom salt
Gypsum salt
Blue vitriol
Green vitriol
Q.11
Milk is
Emulsion
Suspension
Foam
Gel
Q.12
Two moles of an ideal gas expand freely into vacuum. The work done by the gas is
2J
4J
Infinity
0
Q.13
The chemical substance present in bones and teeth is
Calcium phosphate
Calcium chloride
Calcium sulphate
Calcium borate
Q.14
A colloidal system in which a liquid is dispersed in a liquid is called
Gel
Emulsion
Sol
Precipitate
Q.15
Which metal is the heaviest in periodic table among the following ?
Os
Pt
Pb
W
Q.16
White phosphorus is always kept under
Benzene
Kerosene
Ether
Water
Q.17
Milk is a colloidal system in which:
Water is dispersed in fat
Fat is dispersed in water
Fat and water are dispersed in each other
Fat is dissolved
Q.18
Which one of the following is found in kidney stones?
Sodium oxalate
Calcium oxalate
Sodium chloride
Calcium acetate
Q.19
The name of unreactive gas is
Carbon dioxide
Hydrogen
Nitrogen
Oxygen
Q.20
The green colour seen in firework displays is due to the chloride salt of :
Sodium
Strontium
Barium
Calcium
Q.21
Which one is heaviest naturally occurring element of the periodic element?
Iron
Thorium
Rhodium
Uranium
Q.22
Which component referred to as 'Milk sugar'?
Lactose
Maltose
Galactose
Sucrose
Q.23
The reaction intermediate formed during the preparation of diethyl ether from ethanol by treatment with H
2
SO
4
is
Carbanion
Carbocation
Carbene
Free radical
Q.24
Which one of the following elements is used in the manufacture of fertilizers ?
Fluorine
Potassium
Lead
Aluminium
Q.25
Milk is a natural
Solution
Emulsion
Mixture
Suspension
Q.26
The Fungus which is used in the alcohol industry is
Mushroom
Candida Aibicans
Yeast
Rhizopus
Q.27
Which is a natural colloid ?
Sodium chloride
Urea
Cane-sugar
Blood
Q.28
Ruby and sapphire are oxides of
Copper
Tin
Iron
Aluminium
Q.29
Activated Charcoal is used to remove colouring matter from pure substances by
Bleaching
Oxidation
Adsorption
Reduction
Q.30
An emulsion is a colloid of a
Gas in a liquid
Liquid in a liquid
Liquid in a gas
Gas in a solid
Q.31
Which one of the following is an example of a gel ?
Cheese
Milk
Face cream
Shaving cream
Q.32
Which one of the following is not present in cement ?
Clay
Alumina
Alum
Gypsum
Q.33
The most volatile of the given liquids is
Ether
Liquid
Liquid NH
3
Liquid He
Q.34
In deep-sea diving, divers use a mixture of gases consisting of oxygen and
Hydrogen
Nitrogen
Argon
Helium
Q.35
Now-a-days yellow lamps are frequently used as street lights. Which of the following gases is used in these lamps ?
Sodium
Neon
Hydrogen
Nitrogen
Q.36
Match the List-I with List-II and select the correct answer using the codes given below
List-I (Vitamin)
List-II(Chemical compound)
F.
Vitamin A
1.
Thiamin
G.
Vitamin B
1
2.
Retinol
H.
Vitamin C
3.
Ascorbic acid
J.
Vitamin E
4.
Tocopherol
Codes :
F
G
H
J
A.
4
1
3
2
B.
2
3
1
4
C.
4
3
1
2
D.
2
1
3
4
A
B
C
D
Q.37
Emulsifier is an agent which
Accelerates the dispersion
Homogenizes the emulsion
Stabilizes an emulsion
Aids the flocculation of emulsion
Q.38
Which of the following is used to denature ethanol ?
Methyl alcohol
Propyl alcohol
Phenol
Methane
Q.39
Suspension particles have the size between
10
–2
– 10
–4
cm
10
–5
– 10
–7
cm
10
–8
– 10
–10
cm
10
–1
– 10
–2
cm
Q.40
The molecular mass of a gas is
Twice its vapour pressure
Equal to its vapour pressure
Half its vapour pressure
Not related to its vapour pressure
Q.41
The value of gas constant R in Ergs deg
–1
mole
–1
is
8.314 × 10
7
8.341 × 10
7
8.413 × 10
7
4.183 × 10
7
Q.42
An emulsion is a colloidal solution of
Liquid in liquid
Solid in liquid
Gas in solid
Solid in Solid
Q.43
Colloids can be purified by
Condensation
Condensation
Condensation
Dialysis
Q.44
A substance which readily forms colloidal solution in contact with water is called
Extrinsic colloid
Associated colloid
Hydrophobic colloid
Hydrophilic colloid
Q.45
Peptization is a process of
Precipitation of colloidal particles
Purification of colloids
Protection of colloidal solution
Dispersing precipitates into colloidal solution
Q.46
The three elements most needed in common fertilisers are :
Sulphur, Phosphorous and Sodium
Nitrogen, Potassium and Phosphorous
Phosphorous, Sodium and Nitrogen
Calcium, Phosphorous and Potassium
Q.47
Liquid Nitrogen boils at
77 kelvin
82 Kelvin
54 kelvin
97 Kelvin
Q.48
Which of the following is not soluble in water ?
Lead Sulphate
Zinc sulphate
Potassium sulphate
Sodium sulphate
Q.49
In arc welding, Argon is used because of its
Low reactivity with metal
Ability to lower the melting point of the metal
High flammability
High calorific value
Q.50
Which of the following is not a method of preparing oxygen?
Electrolysis of water
Fractional distillation of liquid air
Decomposition of potassium permanganate
Decomposition of manganese dioxide
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