Friday, April 21, 2017


1Which compound is known as white vitriol?ZnSO4 .7H2O
2Which environment leads to the occurrence of acid rain?Sulphur dioxide
3Which type of the fruit formed without fertilisation?Parthenocarpy
4In vulcanisation, with which the natural rubber is heated?Sulphur
5Which algae is used as biofertilizer in the production of crop paddy?Blue green algae
6When lake starts freezing the formation of the ice will start first at which point?Top
7Which unicellular algae are used as source of oxygen in space research?Chlorella
8Which is used as a filler in rubber tyres?Carbon black
9Alcoholic fermentation is brought about the action of which thing?Yeast
10By whom was the principle of 'Black hole' enunciated?S. Chandrashekhar
11Which gas has maximum colorific value?Oil gas
12A molecule of glucose on complete oxidation yields howmany ATP molecules in case of aerobic respiration?72 036
13A lighted candle gets extinguished when covered with a tumbler. Why?Because of inadequate supply of air
14In anaerobic respiration, what is the net gain of ATP per glucose molecule oxidised?2
15The elements of group VA are generally known as which name?Pnicogens
16Which pairs of rays is electromagnetic in nature?x-rays and gamma rays
17Which gase changes lime water in milky colour?Carbon dioxide
18Mercury thermometers can be used to measure temperature up to how many °C?360°C
19What does Gobar gas contains mainly?Methane
20Which are the important raw materials required in cement industry?Limestone and clay
21What is not the cause of low conductivity of electrolyte?Ionisation of salt
22Cooking gas is a mixture of which gases?Butane and propane
23Which acid is produced when milk gets sour?Lactic acid
24Which are the most commonly used chemicals in the artificial rain making or cloud seeding?Silver Iodide (Agl)
25What happens, When water is heated from 0°C to 10°C the volume of water?First decreases then increases
26Which compound does not give a positive test in Lassaigne's test for nitrogen?Hydrazinc
27Litmus paper used in laboratary from which obtained?Lichen
28Which acid is used in synthetic lemonade?Citric acid
29With rise of boiling point of a water, what will be the latent heat of steam?Decreases
30If we sprinkle common salt on an earthworm, why does it die?Due to osmotic shock
31What do the contact of two air masses differing sharply in humidity originate?Temperate cyclones
32Which of the toxic heavy metals is found in modern tannery industries?Chromium
33Why is tetracycline is used?As anti-plague drug
34Which contain high content of lead?High octane fuel
35Where is Pakistan's nuclear power plant located?Kahuta
36Denatured spirit is a mixture of ethyl alcohol, methyl alcohol and which other thing? 65292Pyridine
37During rainy seasons why do doors made up of wood swell up?Due to imbibition
38Of the floating iceberg in the sea, how much is the portion remaining above the sea level?1/10th
39By which enzyme is Urea converted into ammonia and carbon dioxide?Urease
40Which colour of heat radiation represents the highest temperature?White
41Which fertilizer has more nitrogen content?Urea
42Trees in tropical deciduous forest shed their leaves in which season?Dry season
43Food wrapped in newspaper is likely to get contaminated with which desease?Lead
44If a U-238 nucleus splits into two identical parts, how will the two nuclei be so produced?72 0Stable
45Which metal is used for making boats because it does not corrode by seawater?Titanium
46Which is a strong smelling agent added to LPG cylinder to help in the detection of gas leakage?Thioethanol
47Which is a metamorphic rock?Slate
48What is the best conductor of electricity?Salt water
49Which was the The first atomic power reactor in India?Apsara
50Which of the element of group 17 is radioactive?Astatine

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