Q.1
Heavy metals got their name because compared to other atoms they have
Q.2
Which one of the following elements exhibits the greatest tendency to lose electrons ?
Q.3
Which of the following metals causes Itai-Itai disease ?
Q.4
Molasses a by-product in the manufacture of sugar, is converted into
Q.5
Denatured spirit is ethanol mixed with
Q.6
Which of the following caused radioactive pollution along the coast of Kerala ?
Q.7
Which of the following is used as a preservative to protect processed food?
Q.8
Chemical composition of cement is
Q.9
Cement is made hard with
Q.10
'Plaster of Paris' is made by partial dehydration of
Q.11
Milk is
Q.12
Two moles of an ideal gas expand freely into vacuum. The work done by the gas is
Q.13
The chemical substance present in bones and teeth is
Q.14
A colloidal system in which a liquid is dispersed in a liquid is called
Q.15
Which metal is the heaviest in periodic table among the following ?
Q.16
White phosphorus is always kept under
Q.17
Milk is a colloidal system in which:
Q.18
Which one of the following is found in kidney stones?
Q.19
The name of unreactive gas is
Q.20
The green colour seen in firework displays is due to the chloride salt of :
Q.21
Which one is heaviest naturally occurring element of the periodic element?
Q.22
Which component referred to as 'Milk sugar'?
Q.23
The reaction intermediate formed during the preparation of diethyl ether from ethanol by treatment with H2SO4 is
Q.24
Which one of the following elements is used in the manufacture of fertilizers ?
Q.25
Milk is a natural
Q.26
The Fungus which is used in the alcohol industry is
Q.27
Which is a natural colloid ?
Q.28
Ruby and sapphire are oxides of
Q.29
Activated Charcoal is used to remove colouring matter from pure substances by
Q.30
An emulsion is a colloid of a
Q.31
Which one of the following is an example of a gel ?
Q.32
Which one of the following is not present in cement ?
Q.33
The most volatile of the given liquids is
Q.34
In deep-sea diving, divers use a mixture of gases consisting of oxygen and
Q.35
Now-a-days yellow lamps are frequently used as street lights. Which of the following gases is used in these lamps ?
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 A1.Thiamin
G.Vitamin B12.Retinol
H.Vitamin C3.Ascorbic acid
J.Vitamin E4.Tocopherol
Codes :
FGHJ
A.4132
B.2314
C.4312
D.2134
Q.37
Emulsifier is an agent which
Q.38
Which of the following is used to denature ethanol ?
Q.39
Suspension particles have the size between
Q.40
The molecular mass of a gas is
Q.41
The value of gas constant R in Ergs deg–1 mole–1 is
Q.42
An emulsion is a colloidal solution of
Q.43
Colloids can be purified by
Q.44
A substance which readily forms colloidal solution in contact with water is called
Q.45
Peptization is a process of
Q.46
The three elements most needed in common fertilisers are :
Q.47
Liquid Nitrogen boils at
Q.48
Which of the following is not soluble in water ?
Q.49
In arc welding, Argon is used because of its
Q.50
Which of the following is not a method of preparing oxygen?
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