General Science - Chemistry MCQ's

Question 61 :
Alum stops bleeding in minor cuts because of

1. salvation
2. emulsion
3. dialysis
4. coagulation

Question 62 :
Which of the following is used to increase theantiknocking property of petrol

1. Tetramethyl lead
2. Tetraethyl lead
3. Trimethyl lead
4. Triethyl lead

Question 63 :
Tear gas used by the police to disperse the mob contains

1. Carbon dioxide
2. Chlorine
3. Ammonia
4. Hydrogen sulphide

Question 64 :
Tar roads get damaged if there is

1. stagnation of water on road
2. heavy traffic
3. no maintenance
4. no sloping

Question 65 :
Galvanization of iron is carried out using

1. Zinc
2. Tin
3. Copper
4. Chromium

Question 66 :
Which of the following could be used as fuel in propellant or rockets ?

1. Liquid Hydrogen + Liquid Nitrogen
2. Liquid Oxygen + Liquid Argon
3. Liquid Nitrogen + Liquid Oxygen
4. Liquid Hydrogen + Liquid Oxygen

Question 67 :
What is the Chemical name for baking soda?

1. Sodium carbonate
2. Sodium bicarbonate
3. Sodium nitrite
4. Sodium nitrate

Question 68 :
Which of the following is used to denature ethanol ?

1. Methyl alcohol
2. Propyl alcohol
3. Phenol
4. Methane

Question 69 :
PVC is obtained by the polymerisation of

1. Propane
2. Vinyl chloride
3. Styrene
4. Acetylene

Question 70 :
What is the chemical name for Baking Soda?

1. Sodium carbonate
2. Sodium bicarbonate
3. Sodium nitrite
4. Sodium nitrate

Question 71 :
Epsom salt is used

1. as purgative
2. in softening water
3. in paper industry
4. in making tooth paste

Question 72 :
Which of the following is a monoatomic gas?

1. Oxygen
2. Neon
3. Nitrogen
4. Fluorine

Question 73 :
The iron ore which contains 72% of iron is :

1. Magnetite
2. Limonite
3. Haematite
4. Siderite

Question 74 :
Tear gas is

1. Chloroprene
2. Carbonyl chloride
3. Nitrous oxide
4. Bleaching powder

Question 75 :
The acid present in red ants is

1. Acetic acid
2. Butyric acid
3. Caproicacid
4. Formic acid

Question 76 :
The gas which is mainly responsible for the greenhouse effect is:

1. Ozone
2. Oxygen
3. Carbon dioxide
4. Carbon monoxide

Question 77 :
Which of the following is a super cooled liquid ?

1. Ice Cream
2. Teflon
3. Glass
4. Mercury

Question 78 :
The major component in the LPG is

1. methane
2. butane
3. ethane
4. propane

Question 79 :
Refrigerators keep food unspoiled because

1. at its low temperature bacteria and moulds are Inactive
2. at its low temperature the germs are killed
3. at Its low temperature the germs are frozen
4. it sterilises the food

Question 80 :
Find the odd one:

1. Marble
2. Chalk
3. Limestone
4. Slaked lime

Question 81 :
Milk tastes sour when kept in the open for sometime due to the formation of .

1. lactic acid
2. citric acid
3. acetic acid
4. carbonic acid

Question 82 :
Which one of the following metals is used to galvanise iron?

1. Copper
2. Lead
3. Zinc
4. Mercury

Question 83 :
The anode in a dry cell consists of

1. Copper
2. Zinc
3. Cadmium
4. Graphite

Question 84 :
Spirit in contact with body gives cool sensation because it is :

1. liquid
2. transparent
3. highly volatile
4. a good conductor

Question 85 :
Ethanol containing 5%. water is known as

1. rectified spirit
2. denatured spirit
3. methylated alcohol
4. power alcohol

Question 86 :
Gelatin is mostly used in making icecreams in order to

1. prevent making a colloid
2. stabilise the colloid and prevent crystallisation
3. stabilise mixture
4. enrich the aroma

Question 87 :
In the electroplating of gold the electrolyte used is?

1. Gold chloride
2. Gold nitrate
3. Gold sulphate
4. Potassium aurocyanide

Question 88 :
Solder metal is an alloy of

1. lead and tin
2. lead and antimony
3. copper and zinc
4. copper and tin

Question 89 :
Water can be separated from alcohol water mixture by

1. decantation
2. evaporation
3. distillation
4. sublimation

Question 90 :
Cement is made hard with

1. dehydration
2. hydration and dissociation of water
3. Dissociation of water
4. Polymerisation