Chemistry Test 1
Total Questions: 25
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A ) Oxygen
B ) Hydrogen
C ) Water vapour
D ) Carbon dioxide ✅
A ) Hydrogen peroxide
B ) Alcohol
C ) Oxalic acid ✅
D ) Petrol
A ) Methane and Carbon dioxide
B ) Oxygen and Nitrogen
C ) Bautane and Propane ✅
D ) Oxygen and Methane
Explanation:
✅ Cooking gas is a mixture of: Butane and Propane
- Cooking gas is commonly known as LPG (Liquefied Petroleum Gas).
- It mainly consists of two hydrocarbons:
- ✅Butane (C₄H₁₀) ✅Propane (C₃H₈)
🔹 Properties of LPG:
- ✅Stored under pressure in liquid form
- ✅Easily vaporizes to gas when released
- ✅Highly flammable — used widely as cooking fuel.
A ) Oxygen
B ) Nitrogen
C ) Carbon dioxide
D ) Hydrogen sulphide ✅
A ) Boiling point increases ✅
B ) Boiling point decreases
C ) Boiling point is not affected
D ) Freezing point increases
A ) Carbon dioxide ✅
B ) Carbon monoxide
C ) Nitrogen dioxide
D ) Sulphur dioxide
A ) Mineral fuels ✅
B ) Wood
C ) Coal
D ) Microbes
A ) Hydrogen ✅
B ) Charcoal
C ) Natural gas
D ) Gasoline
A ) A chloro compound
B ) A sulphur compound ✅
C ) A flourine compound
D ) Acetic acid
A ) Fats and sugar
B ) Fats,sugar and proteins
C ) Starch,sugar and proteins
D ) Starch and sugar ✅
A ) Sodium bicarbonate ✅
B ) Sodium Nitrate
C ) Sodium Carbonate
D ) Potassium
A ) Calcium
B ) Iron ✅
C ) Potassium
D ) Protein
A ) Hydrogen
B ) Carbon dioxide
C ) Methane
D ) Ethylene ✅
A ) Ferrous chloride
B ) A mixture of ferrous and ferric hydroxide ✅
C ) Sodium Carbonate
D ) Ferric chloride
A ) 75% potassium nitrate+15%charcoal+10% sulphur
B ) 75% potassium nitrate+10% charcoal+15% sulphur
C ) 75% potassium nitrate+10% charcoal+15% sulphur
D ) 75% potassium nitrate+15% charcoal+15% sulphur ✅
A ) Hits the glass wall of the tube
B ) Strikes metal target ✅
C ) Pass through a strong magnetic field
D ) None
A ) In order of increasing volume
B ) In order of increasing atomic number ✅
C ) In order of increasing atomic weights
D ) In order of increasing density
A ) Left hand top corner ✅
B ) Left hand bottom corner
C ) Right hand top corner
D ) Right hand bottom corner
A ) Increases
B ) Decreases ✅
C ) Neither increases nor decreases
D ) Decorations then increases
A ) Nuclear fusion
B ) Nuclear fission ✅
C ) Radioactive
D ) Nuclear fission and fusion both
A ) Gain in electrons
B ) Gain of hydrogen
C ) Loss of electrons ✅
D ) Combustion
A ) Electrons in their nuclei
B ) Nuclei with less number of neutrons
C ) Unstable nuclei ✅
D ) Electrons removed from the outermost shell
Explanation:
- Radioactivity was discovered by Becquerel.
- Radioactivity emerges from: Nuclear energy.
- Radioactivity is measured by which device Geiger counter.
- Thorium metal is not only magnetic but also radioactive Radioactive element are Plutonium, Thorium, Uranium.
- Alpha rays is a positively charged particle emitted by a radioactive element.
- A negatively charged particle emitted by a radioactive element during radioactive decay is called a beta particle.
- Radioactive isotopes are used in medicine for both diagnostic imaging and treatment.
- A 100 g sample of a radioactive element has a half life of 5 days. 12.5grams of radioactive material will remain after 15 days.
- Radioactive elements have atomic number greater than82.
- Weak Nuclear Force is responsible for the radioactive decay of the nucleus.
- The radioactive material must be placed in a box of Lead.
- Radioactive cobalt 60 is used for curing: Cancerous cells.
- Radioactive isotope present in atmosphere is: carbon -14.
- Unstable nuclei are radioactive.When radioactivity rays are passed through air or any gas, they cause it to Ionize.
A ) Heavy water
B ) Long rods of cd
C ) Cubical blocks of steel ✅
D ) A pile of blocks made of graphite
A ) Nuclear heat is carried by ordinary system
B ) Uranium is difficult to heat
C ) The walls of nuclear reactors can not withstand high temperature ✅
D ) High pressure inside the reactor reduces the temperature
A ) Nuclear fission
B ) Nuclear fusion ✅
C ) Combustion of hydrogen
D ) Combustion of He