General Chemistry (Part 5)

Question 1

Carbon monoxide is an inflammable gas. Which one of the following is also inflammable?

Helium | Nitrogen | Oxygen | Hydrogen

Answer 1

hydrogen

Question 2

Which one of the following metals does not react with water to produce hydrogen?

Potassium | Cadmium | Sodium | Lithium

Answer 2

cadmium

Question 3

Ozone consists of

Answer 3

oxygen only

Question 4

One of the constituents of tear gas is:

Answer 4

chloropicrin

Question 5

An atomic dock is based on transitions in:

Answer 5

cesium

Question 6

Silver halides are used in photographic plates because they are:

Answer 6

Reduced by light.

Question 7

Tetra ethyl lead (TEL) is:

Answer 7

An antiknock compound.

Question 8

The isotope used for the production of atomic energy is:

Answer 8

U-235

Question 9

Which of the following is not a nucleon?

Answer 9

positron

Question 10

The material used in the manufacture of lead pencil is:

Answer 10

graphite

Question 11

If all bullets could not be removed from gunshot injury of a man it may cause poisoning by

Answer 11

lead

Question 12

German silver an alloy does not contain the metal:

Nickel | Zinc | Copper | Silver

Answer 12

silver

Question 13

Oxygen which is vital for life is a product of photosynthesis and comes from

Answer 13

water

Question 14

The noble gas used in radiotherapy is:

Answer 14

radon

Question 15

Steel contains:

Answer 15

12% carbon

Question 16

The chemical(s) most commonly used for cloud seeding or artificial rainmaking is/are:

Silver Iodide | Sodium Chloride | Dry ice or frozen carbon dioxide | All of these

Answer 16

silver iodide

Question 17

The substance that is added to make natural rubber strong and bouncier is:

Answer 17

sulfur

Question 18

White phosphorus is always kept under:

Answer 18

benzene

Question 19

Galena is a mineral of:

Answer 19

lead

Question 20

Magnesium is an alloy of:

Answer 20

aluminum and magnesium

Question 21

Galvanization of iron is carried out using:

Answer 21

zinc

Question 22

Cooking gas is a mixture of:

Answer 22

butane and propane

Question 23

Dry powder fire extinguishers contain:

Answer 23

sand and sodium bicarbonate

Question 24

Which type of glass is used for making glass reinforced plastic?

Answer 24

fiber glass

Question 25

Two elements which are used to absorb neutrons to control the chain reaction during nuclear fission are:

Answer 25

boron and cadmium

Question 26

The most commonly used chemicals in the artificial rainmaking or cloud seeding are: AgI | NaCl | Frozen CO2 | All of these

Answer 26

AgI

Question 27

Which of the following can be used to absorb neutrons to control the chain reaction during nuclear fission? Boron | Heavy water | Uranium | Plutonium

Answer 27

boron

Question 28

Hydrogen bomb is based on the principle of:

Answer 28

uncontrolled fusion reaction

Question 29

Supersonic Jet causes pollution by thinning of:

Answer 29

O2 layer

Question 30

Which type of glass is used for making glass reinforced plastic?

Answer 30

fiber glass

Question 31

Which of the following metals causes Itai-Itai disease?

Answer 31

cadmium

Question 32

Glycol is added to aviation gasoline because it:

Answer 32

prevents freezing of petrol

Question 33

Which one of the following minerals is found in Monazite sand?

Answer 33

thorium

Question 34

Nowadays yellow lamps are frequently used as streetlights. Which of the following gases is used in these lamps?

Answer 34

sodium

Question 35

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

Answer 35

liquid hydrogen + liquid oxygen

Question 36

The addition of gypsum to Portland cement helps in:

Answer 36

preventing rapid setting of cement

Question 37

The constituents of automobile exhaust that can cause cancer is/are:

Answer 37

lead

Question 38

Hard steel contains:

Answer 38

0.5 to 5 percent carbon

Question 39

Cement is formed by strongly heating a mixture of:

Answer 39

limestone and clay

Question 40

Glass is a:

Answer 40

supercooled liquid

Question 41

The temperature of oxyacetylene flame is around:

Answer 41

3200°C

Question 42

The refrigerant FREON is:

Answer 42

difluoro dichloride methane

Question 43

Glass is a:

Answer 43

supercooled liquid

Question 44

Stainless steel is an alloy of:

Answer 44

chromium carbon and iron carbon

Question 45

For generation of biogas the materials commonly used are:

Answer 45

animal wastes

Question 46

Raw materials used for the manufacture of glass are:

Answer 46

sand, soda, limestone

Question 47

Which of the following is used in welding broken pieces of iron rails and machine parts?

Answer 47

aluminum powder

Question 48

The BOD values of water indicate the:

Answer 48

Amount of oxygen used for biochemical oxidation.

Question 49

Which of the following in automobile exhaust can cause cancer? Oxides of nitrogen | Carbon monoxide | Lead | polyclinic hydrocarbons

Answer 49

lead

Question 50

Bleaching powder is used in drinking water as a/an:

Answer 50

disinfectant