Q1) Air is regarded as a mixture because Its pressure may very Its temperature may change Its volume changes under different conditions Its composition may vary Q2. Which of the following is a compound? 1 point Stainless steel Bronze Graphite Hydrogen sulphide Q3. In which of the following the constituents are present in fixed ratio? 1 point Mixture Compound Solution Colloid Q4. Brass is a 1 point Compound Homogeneous mixture Element Heterogeneous mixture Q5. The element which is a liquid slightly above 30 degree Celsius is 1 point Magnesium Sodium Cesium Lithium Q6. Which of the following element has the characteristics of both metals and nonmetals? 1 point Carbon Nitrogen Arsenic Oxygen Q7. In sugar solution, 1 point Sugar is solute, water is solvent Sugar is solvent, water is solute Both are solutes Both are solvents Q8. Heterogeneous mixture in which the solute particles do not dissolve and remain suspended throughout the solvent and the solute particles can be seen with the naked eye is known as: 1 point Colloidal solution Super saturated solution Sublimation Suspensions Q9. In tincture of iodine, find the solute and solvent? 1 point alcohol is the solute and iodine is the solvent iodine is the solute and alcohol is the solvent any component can be considered as solute or solvent tincture of iodine is not a solution Q10. When two liquids do not mix, they form two separate layers and are known as 1 point Miscible liquids Immiscible liquids Saturated liquids Super saturated liquids
Answers
Answer:
PLEASE MARK MY ANSWER AS THE BRAINLIEST ANSWER
Explanation:
Answer 1:
- Air is a gas mixture that comprises the atmosphere of the Earth.
- These gases are colourless and odourless, so we can’t see them, but we can only sense them.
- The atmosphere is an ocean of these gases.
- It is made up of 78% nitrogen, 21% oxygen and 1% other gases and water vapour.
- From place to place, the moisture content varies.
- As compared to wetlands, arid regions have less moisture content
answer 2:Correct Answer: D
Solution :
Hydrogen sulphide (H2S) is a compound of hydrogen and sulphur. Stainless steel and bronze are alloys whereas graphite is allotropic form of element carbon.
Answer3: In which of the following the constituents are present in any ratio
a) Mixture
b) compound
c) solution
d) colloid
Answer: in a compound there is always a fixed ratio whereas in others it is not
ANSWER4:Brass is an alloy made up of uniform composition of copper and zinc. It is a homogeneous mixture in which zinc and copper can be varied to create a range of brasses with varying properties.
ANSWER 5: Correct option is (C ) Cesium
The metals which exists as liquids above 30 degree celcius are :-
1)Mercury-(Also in room temperature)
2)Cesium
3)gallium
ANSWER 6 : Answer:
arsenic
Explanation:
Arsenic is a metalloid. A metalloid is an element that has properties of both metals and non-metals. Metalloids occur in the periodic table on either side of the staircase line that starts between boron and aluminum. When heated in air, arsenic combines with oxygen to form arsenic oxide
ANSWER 7: Answer: (1) Sugar is solute, water is solvent
A solution is a homogeneous mixture of two or more components in which the particle size is smaller than 1 nm. Common examples of solutions are the sugar in water and salt in water solutions, soda water, etc. Sugar in water and salt in water solutions, as well as soda water, are popular examples of solutions. All the components in a solution appear as a single phase.
- The solvent and the solute are the two components of a solution.
- The solvent is the component that dissolves the other component.
- Solute refers to the component that are dissolved in the solvent.
- For a sugar solution, the solute will be sugar and solvent will be water.
As the sugar molecules spread evenly throughout the water, the sugar dissolves. While preparing solutions, we can alter the rate of the dissolution of solutes by increasing their surface area.
ANSWER 8: Correct option is (D) SUSPENSION
Suspensions are non-homogeneous systems. In suspension, solute particles do not dissolve but remain suspension throughout the bulk of the medicine.
ANSWER 9: Iodine is the solute and alcohol is the solvent
ANSWER 10: Correct option is (B) Immiscible liquids
When two liquids do not mix they form two separate layers and are known as immiscible liquids. These two liquids can be separated by using a separating funnel.