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Quiz 20
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Q.1
Which one of the following has greatest mass ?
Electron
Proton
Neutron
Hydrogen nucleus
Q.2
Which of the following vitamins is generally excreted by human in urine?
Vitamin B
Vitamin C
Vitamin D
None of these
Q.3
Inert gases are
Miscible with water
Not stable
Chemically unreactive
Chemically very active
Q.4
German silver used for making utensils is an alloy of
Copper, silver, nickel
Copper, zinc, nickel
Copper, zinc, aluminium
Copper, nickel, aluminium
Q.5
Which of the following alloy is used in making magnet ?
Duralumin
Stainless steel
Alnico
Magnalium
Q.6
The substance that is added to make natural rubber strong and more bouncy is
Polythene
Sponge
Sulphur
Chlorine
Q.7
Sea weeds are important source of
Fluorine
Chlorine
Bromine
Iodine
Q.8
The strongest oxidizing agent among the following is:
Chlorine
Iodine
Fluorine
Oxygen
Q.9
Catalytic converters are generally made from :
Alkaline metals
Hydrogen
Transition metals
Carbon
Q.10
Which one of the following gases has the highest calorific value?
Natural gas
Water gas
Coal gas
Indane gas
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
Raman spectra
Absorption spectra
Emission spectra
Fluorescence
Q.12
Methanoic and ethanoic acids can be distinguished by the action of
NaHCO
3
NaOH
Tollen's reagent
SOCl
2
Q.13
Which of the following alkali metals has highest specific heat?
Caesium
Rubidium
Potassium
Lithium
Q.14
Vinegar made by fermentation from cane sugar contains
Palmitic acid
Lactic acid
Citric acid
Acetic acid
Q.15
Which one of the following is found in Vinegar ?
Acetic acid
Propionic acid
Formic acid
Butyric acid
Q.16
If a buffer solution is diluted its pH
Is increased
Remains same
Is decreased
Will slowly increase and then it will decrease
Q.17
'Vinegar' is a commercial name of
Oxalic acid
Hydrochloric acid
Acetic acid
Citric acid
Q.18
The metal present in vitamin B
12
is
Fe
Co
Mg
Mo
Q.19
Which of the following is not present in RNA
Thymine
Uracil
Ribose
Phosphate
Q.20
The presence of Cobalt in Vitamin B
12
was established for the first time by
Hydrolysis test
Spectroscopy
Borax-Bead test
Sodium Nitroprusside test
Q.21
What is the second largest component in milk ?
Fat
Minerals
Water
Sugar
Q.22
Which one of the following does not form oxyacid ?
Sulphur
Chlorine
Nitrogen
Fluorine
Q.23
In its reaction with silver nitrate, C
2
H
2
shows
Oxidising property
Reducing property
Basic property
Acidic property
Q.24
Helium is added to the oxygen supply of deep sea divers because it is
Less poisonous than nitrogen
Lighter than nitrogen
Readily miscible with oxygen
Less soluble in blood than nitrogen at high pressure
Q.25
Which of the following is colourless?
Chlorine
Oxygen
Phosphorus
Sulphur
Q.26
If the equilibrium constants for the systems H
2
+ I
2
-> 2HI and 2HI -> H
2
+ I
2
are K
1
and K
2
respectively, the relationship between K
1
and K
2
is :
K
1
= K
2
K
1
= 2K
2
K
1
= K
2
/2
K
1
= 1/K
2
Q.27
Among the fuels given below, the one with highest calorific value is
Coke
Coal
Wood
Natural gas
Q.28
Which of the following is not a derivative of barbituric acid?
Nembutal
Amytal
Veronal
Equanil
Q.29
The apparatus used to test acidity of aqueous solution is
PH meter
Ammeter
Hygrometer
Acidmeter
Q.30
The enzyme that converts glucose to ethyl alcohol is :
Invertase
Maltase
Zymase
Diastase
Q.31
Which among the following is a carbohydrate ?
Nylon
Cane-sugar
Turpentine
Hydrogen peroxide
Q.32
Vulcanization of rubber is carried out by adding
Sulphur
Carbon
Ozone
Phosphorus
Q.33
Iodine value is used to estimate
Hydroxyl groups in oil
Alkali content in oil
Unsaturation in oil
Carboxylic groups in oil
Q.34
The influence of temperature on reaction rate is predicted by
Van der Waals equation
Kirchhoff's equation
Arrhenius equation
Lewis equation
Q.35
Which of the following is the best fuel in terms of energy released per gram of fuel?
Hydrogen
Methane
Ethanol
Butane
Q.36
Which of the following substance's smell is similar to Ethanoic acid?
Tomato juice
Kerosene
Vinegar
Lemon
Q.37
Which one of the following organic compound is used to remove stains of iron compounds?
Oxalic acid
Benzoic acid
Phthalic acid
Cinnamic acid
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:
Amino phenyl alanine
Hydroxy phenyl alanine
Phenyl alanine
Dihydroxy phenyl alanine
Q.39
How many atoms of oxygen are in a glucose molecule?
3
4
6
10
Q.40
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
Xenon
Krypton
Argon
Helium
Q.41
Which one is the most reactive gaseous element?
Chlorine
Bromine
Iodine
Flourine
Q.42
Among the following the hardest metal is
Gold
Iron
Platinum
Tungsten
Q.43
Which of the following metals occurs in free state ?
Copper
Iron
Zinc
Lead
Q.44
What material is used to make electric heater coil ?
Copper
Iron
Silver
Nichrome
Q.45
The element which is used for vulcanizing rubber
Sulphur
Bromine
Silicon
Phosphorus
Q.46
The substance which does not expand on going from liquid state to solid state is
Water
Cast-iron
Aluminium
Type metal
Q.47
Which of the following is used in welding broken pieces of iron rails and machine parts?
Aluminium sulphate
Solder
Aluminium powder
None of the above
Q.48
Which of the following elements is not present in stainless steel?
Iron
Tungsten
Chromium
Nickel
Q.49
The most important ore of lead is
Galena
Magnetite
Pyrolusite
Siderite
Q.50
The wire of flash bulbs is made up of
Mg
Ba
Cu
Ag
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