State of Matter

1.Which of the following does not have oxygen?
A. Cement
B. Limestone
C. Carbohydrates
D. Glass
Option “C” is correct.
Glass is made up of silicates, limestone is calcium carbonate. Ammonia does not contain oxygen.
2.Which substance is found in nature in all three states?
A. Water
B. hydrogen peroxide
C. ammonia
D. sulfur dioxide
Option “A” is correct.
Solid, liquid and gases are three states of matter.
Water generally exists in liquid state but it can be found in other two states also. In solid state it exists as ice and in gaseous state it exists as water vapour.
3.Stainless steel is an alloy of 
A. Cu
B. Ni and Cr
C. Mn
D. Zn
Option “A” is correct.
Stainless steels are iron alloys composed of chromium and nickel.
4.Which of the following is neither an element nor a compound?
A. Air
B. water
C. Mercury
D. sodium chloride
Option “A” is correct the fourth state of matter
A. Solid
B. liquid
C. plasma
D. gas
Option “C” is correct.
Plasma, the fourth state of matter (beyond the conventional solids, liquids and gases), is an ionized gas consisting of approximately equal numbers of positively and negatively charged particles.
6.Which of the following is a compound?
A. Carbon dioxide
B. Iron
C. Oxygen
D. Air
Option “A” is correct.
A compound is mixture of elements and molecules ,
Iron – element
Hydrogen – element
CO2- compound
Air – mixture
Oxygen – element
7.What is bleaching powder?
A. Element
B. compound
C. mixture
D. non metal
Option “B” is correct.
8.Which one of the following is not a mixture?
A. Distilled water
B. Sugar dissolved in water
C. Liquefied Petroleum Gas (LPG)
D. Gasoline
Option “A” is correct.
Distilled water is the pure form of water with no impurities present in it;
others are the misture of two or more components.
9.there is gunpowder
A. Element
B. compound
C. mixture
D. liquid
Option “C”  is correct.
Gun powder is a mixture that contains sulphur, charcoal, and potassium nitrate(saltpeter). Gun powder is also known as black powder. Sulphur and charcoal act as fuels and the saltpeter is an oxidizer.
10.Which element is not present in coal?
A. Hydrogen
B. Oxygen
C. Carbon
D. Phosphorous
Option “A” is correct.
Coal is formed from hydrocarbons which are compounds of carbon, hydrogen and oxygen. Phosphorous is not present in coal.