close

Science: Man-made Fiber and Ans

 Essay regarding Science: Synthetic Fiber and Ans

(Q. )Give one example of each: metals and non-metals.

(Ans)В В

Alloys: Copper.

Non-Metals: Sulphur.

(Q. )Name the metal, which is the best conductor of heat and electricity. (Ans)В В

Copper.

(Q. )Name the property by virtue of which in turn metals could be drawn in to thin cables. (Ans)В В

Ductility.

Q. )Name the gas produced, when ever metals acts with acids.

(Ans)В В

Hydrogen gas.

(Q. )What is the color of the copper mineral sulphate remedy?

(1 Mark)

(Ans)В В

Blue.

(Q. )State the nature of oxides of nonmetals.

(1 Mark)

(Ans)В В

The oxides of nonmetals are generally, basic in nature.

(Q. )Which metallic is trapped in kerosene?

(1 Mark)

(Ans)В В

Sodium.

(Q. )Name the property in the metal in which it can be attracted into skinny sheets. (1 Mark)

(Ans)В В

Malleability.

Queen. )What happens when sulphur responds with air?

(1 Mark)

(Ans)В В

Sulphur dalam oxide is formed.

S & O2 SO2

(Q. )Which nonmetal attracts fire, if perhaps exposed to air?

(1 Mark)

(Ans)В В

Phosphorus.

(Q. )Name the gas that burns which has a POP sound.

(1 Mark)

(Ans)В В

Hydrogen gas.

(Q. )What are displacement reactions?

(1 Mark)

(Ans)В В

The reactions by which more reactive metals shift less reactive metals using their compounds in aqueous remedy are called displacement reaction.

(Q. )Give one use of non-metal in our everyday life.

(1 Mark)

(Ans)В В

Chlorine gasis used in refinement of drinking water.

(Q. )What are metalloids?

(1 Mark)

(Ans)В В

Metalloids are those components which have any properties of metals and several properties of non-metals.

(Q. )Which steel is use for wrap foodstuffs?

(1 Mark)

(Ans)В В

Aluminium.

(Q. )What occurs sulphur di- oxide reacts with drinking water? Give the chemical reaction involved. (2 Marks)

(Ans)В В

When sulpur dioxide responds with normal water, sulphurous acidity is formed. SO2 + WATER H2SO3

(Q. )Why lemon pickle cannot be stored in a great aluminium foil? (2 Marks)

(Ans)В В

Aluminum reacts with the citric acid solution present in the lemon. Therefore, lemon pickles can't be stored in aluminium ships. (Q. )Write two crucial properties of metals.

(2 Marks)

(Ans)В В

Properties of precious metals:

(a) Great conductors of warmth and electric power.

(b) Glossy, i. elizabeth., theyhave bright appearance.

(Q. )Why water piping cannot displace zinc coming from zinc sulphate solution? (2 Marks)

(Ans)В В

Copper is much less reactive than zinc. Hence, copper simply cannot displace zinc from zinc sulphate remedy.

(Q. )Why immersion equipment for warming liquids are made up of metallic chemicals? (2 Marks)

(Ans)В В

Alloys are good conductors of heat. Consequently, immersion fishing rods for heating liquids contain metallic substances.

(Q. )What happens when flat iron nails are dipped in water in a check tube for any week? (2 Marks)

(Ans)В В

When straightener nails are dipped in water in a check tube for a week, a brown coating gets deposited on the flat iron nails, which isknown asrust.

(Q. )What happens when magnesium ribbon can be burnt in air?

(2 Marks)

(Ans)В В

Once metals burn up in air flow, theformation with their oxide takes place. Hence, the moment Magnesium reacts with atmosphere, magnesium oxide is formed. 2Mg+O22MgO

(Q. )In a hormone balance experiment, a student by mistake infuse magnesium pieces in blue coloured copper mineral sulphate remedy. What modify will this individual observe in the colour in the solution? Write down thier reaction likewise. (2 Marks)

(Ans)В В

When magnesium pieces are put into the green coloured water piping sulphate option, the colour in the solution vanishes because magnesium (mg) is more reactive than copper mineral. It displaces copper coming from copper sulphate solution. Magnesium + CuSO4 MgSO4 & Cu

Q. )(a)You will need to have seen in the laboratory that sodium material is always trapped in kerosene olive oil. Why is it and so? (b)Name a nonmetal that is certainly very reactive and is kept in water. (2 Marks)

(Ans)В В

(a)Sodium metal is very reactive. It responds vigorously with air and water and a lot of heat is usually generated. Consequently , it is kept in kerosene. (b)Phosphorous

(Q. )What happens when iron responds with air and water? Give the chemical reaction involved. (3...

 Essay regarding The Slippery Slope by Edward J

Essay regarding The Slippery Slope by Edward J

п»ї Part 3: The Slippery Slope by Edward J. Tully Content Questions 1 . Based on the observations of stories event in the past 10 years, did Tully's…...

Read
 Essay upon Charles Chaplin and his influence in the Nazi-Erausing the example of the movie The fantastic Dictator

Essay upon Charles Chaplin and his influence in the Nazi-Erausing the example of the movie The fantastic Dictator

Analytic Daily news Charles Chaplin and his influence in the Nazi-­‐Era -­‐using…...

Read