Q.1
Which one of the following has greatest mass ?
Q.2
Which of the following vitamins is generally excreted by human in urine?
Q.3
Inert gases are
Q.4
German silver used for making utensils is an alloy of
Q.5
Which of the following alloy is used in making magnet ?
Q.6
The substance that is added to make natural rubber strong and more bouncy is
Q.7
Sea weeds are important source of
Q.8
The strongest oxidizing agent among the following is:
Q.9
Catalytic converters are generally made from :
Q.10
Which one of the following gases has the highest calorific value?
Q.11
When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in
Q.12
Methanoic and ethanoic acids can be distinguished by the action of
Q.13
Which of the following alkali metals has highest specific heat?
Q.14
Vinegar made by fermentation from cane sugar contains
Q.15
Which one of the following is found in Vinegar ?
Q.16
If a buffer solution is diluted its pH
Q.17
'Vinegar' is a commercial name of
Q.18
The metal present in vitamin B12 is
Q.19
Which of the following is not present in RNA
Q.20
The presence of Cobalt in Vitamin B12 was established for the first time by
Q.21
What is the second largest component in milk ?
Q.22
Which one of the following does not form oxyacid ?
Q.23
In its reaction with silver nitrate, C2H2 shows
Q.24
Helium is added to the oxygen supply of deep sea divers because it is
Q.25
Which of the following is colourless?
Q.26
If the equilibrium constants for the systems H2 + I2 -> 2HI and 2HI -> H2 + I2 are K1 and K2 respectively, the relationship between K1 and K2 is :
Q.27
Among the fuels given below, the one with highest calorific value is
Q.28
Which of the following is not a derivative of barbituric acid?
Q.29
The apparatus used to test acidity of aqueous solution is
Q.30
The enzyme that converts glucose to ethyl alcohol is :
Q.31
Which among the following is a carbohydrate ?
Q.32
Vulcanization of rubber is carried out by adding
Q.33
Iodine value is used to estimate
Q.34
The influence of temperature on reaction rate is predicted by
Q.35
Which of the following is the best fuel in terms of energy released per gram of fuel?
Q.36
Which of the following substance's smell is similar to Ethanoic acid?
Q.37
Which one of the following organic compound is used to remove stains of iron compounds?
Q.38
The fat of a common mussel-secretes a sticky glue that can be used to make heart implants. The unique chemical compound present in the glue is:
Q.39
How many atoms of oxygen are in a glucose molecule?
Q.40
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
Q.41
Which one is the most reactive gaseous element?
Q.42
Among the following the hardest metal is
Q.43
Which of the following metals occurs in free state ?
Q.44
What material is used to make electric heater coil ?
Q.45
The element which is used for vulcanizing rubber
Q.46
The substance which does not expand on going from liquid state to solid state is
Q.47
Which of the following is used in welding broken pieces of iron rails and machine parts?
Q.48
Which of the following elements is not present in stainless steel?
Q.49
The most important ore of lead is
Q.50
The wire of flash bulbs is made up of
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