is an alio trope of carbon used to make ornaments.
Question types
Carbon: An Important Element question types
148 questions across 14 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
148
Questions
14
Question groups
5
Question types
01
Write the Correct Alternative.
29 Q→02Find the odd one out.
9 Q→03Write the following Statement Is True Or False. & Write True Statement.
15 Q→04Answer the following in one sentece.
8 Q→05Name The Following.
6 Q→06Answer the following questions in detail.
6 Q→07Distinguish Between.
2 Q→08Answer the following question.
21 Q→09Give Scientific Reason.
8 Q→10Answer the following question.
16 Q→11Fill In The Blanks.
9 Q→12Match The Columns/pair.
5 Q→13Draw Diagram.
2 Q→14Explain Statement.
12 Q→Sample Questions
Carbon: An Important Element questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
View full solution →
is not a property of carbon dioxide gas.
- ✓Supporting combustion
- BOdourless
- CColourless
- DTurns blue litmus red
Answer: A.
View full solution →Biogas contains about methane.
- ✓55% to 60%
- B20% to 25%
- C90% to 95%
- D40% to 45%
Answer: A.
View full solution →Melting point o* methane is
- ✓-182.5 °C
- B-161.5 °C
- C182.5 °C
- D161.5 °C
Answer: A.
View full solution →Melting point of C02 is
- A26 °C
- B56 °C
- ✓-56.6°C
- D-98°C
Answer: C.
View full solution →Lubricants, Electrodes, Ornaments, Arc Lamps
Peat, Charcoal, Lignite, Bituminous
Carbohydrates, Coal, Proteins, Fats
Cotton, Silk, Proteins, Wool
Coal, Petroleum, Natural gas, Cotton
Production of biogas is aerobic process
Methane gas is black in colour.
COz is used to make aerated drinks.
Structural formula of propyne is CH3 – C = CH.
Coke is used in production of water gas i.e. (CO2 + H2O).
Take small samples of sugar, wool, dry leaves, hair, seeds, split pulses and plastic in separate test tubes. Heat each test tube and observe the changes taking place in the substances. What does the black substance in each test tube indicate?
Take some milk in an evaporating dish. Heat the evaporating dish on a bunsen burner. What remains behind at the bottom of an evaporating dish on complete evaporation of the milk?
What are basic organic compounds? What are they also called as?
What are organic and inorganic compounds?
Give the following information of carbon dioxide: Molecular formula, Molecular mass, Melting point, Percentage occurrence in air.
Use of carbon dioxide is dramas and movies
Organic solvents is which fullerenes are soluble.
Components of biogas
Chemicals used in regular fire extinguisher.
Organic compounds prepared from methane.
What happens when substances like milk, sugar, wool, dry leaves, hair and seeds are heated strongly in hard glass test tube?
Write two physical properties each. : Fullerene
Write two physical properties each. : Charcoal
Write two physical properties each. : Diamond
Use of $CO_2$ in fire extinguisher.
View full solution →Crystalline and non-crystalline forms of carbon.
Diamond and graphite.
What is allotropy?
How is methane formed? Give structural formula and electron dot model of methane.
Give the uses of methane.
Give the physical properties of methane.
Give the occurrence of methane.
Methane is used as a domestic fuel.
Graphite is used as a lubricant.
Graphite is a good conductor of electricity whereas diamond is a non-conductor of electricity.
Covalent compounds have low melting and boiling points.
Biogas is an eco-friendly fuel.
With the help of a neat labelled diagram explain the laboratory preparation of Carbon dioxide gas.
Apparatus : Test tube, straw, lime water, etc.
Procedure: Take freshly prepared lime water in a test tube. Blow air in it for some time through the straw and observe the lime water. Note the observation.
What did you see?
What might be the reason behind the change?
Apparatus : Pencil, electrical wires, battery/ cell, small bulb, water, kerosene, test tube, lead pencils, etc.
Procedure : Remove the lead from a pencil and arrange the apparatus as shown in the above diagram. Note your observations for the following.
(a) What is the colour of lead in the pencil? .
(b) Try to break lead with your hand.
(c) Start the electric current in the circuit and observe. What did you find?
(d) Take some water in a test tube. Take some kerosene in another test tube. Put lead dust in both the test tube. What did you observe?
Apparatus : Coal, match box, moist litmus paper, etc.
Procedure : Ignite the coal. Hold the moist blue litmus paper over the gas released on igniting the coal. Note the observation
.
(a) With which gas in the air does the coal react on igniting?
(b) What is the substance formed?
(c) What change takes place in the litmus paper?
(d) Write down the chemical reaction taking place in the above procedure.
What is a compound? How are compounds formed?
$2 NaOH + CO_2 →$………………..+………………..
View full solution →………………..+………………..→ HCl + Cl + HCl
………………..+………………..$\rightarrow CO+2 H_2 O+\text { Heat }$
View full solution →1. ………………..+………………..$\rightarrow C O+2 H _2 O +$ Heat
2. ………………..+………………..$\rightarrow HCl + Cl + HCl$
3. $2 NaOH + CO _2 \rightarrow$.………………..+………………..
View full solution →2. ………………..+………………..$\rightarrow HCl + Cl + HCl$
3. $2 NaOH + CO _2 \rightarrow$.………………..+………………..
The element hydrogen is present in ….. organic compound.
| Column ‘A | Column ‘B’ |
| (1) Water gas(2) Methane gas(3) Producer gas(4) Carbon dioxide gas | (a) CH4(b) CO + H2(c) CO2(d) CO + H2 + CO2 + N2 |
>
| Column ‘A’ | Column ‘B’ |
| (1) Fullerene(2) Diamond(3) Graphite | (a) Lubricants(b) Insulator(c) Ornaments |
| Column ‘A’ | Column ‘B’ |
| (1) Propyne(2) Propene(3) Propane | (a) CH3 – CH2 – CH3(b) CH3 – C = CH(c) CH3 – CH = CH2 |
| Column ‘A’ | Column ‘B’ |
| (1) Peat (2) Lignite (3) Bituminous (4) Anthracite | (a) 60-70% of Carbon (b) 95% of Carbon (c) less than 60% of Carbon (d) 70 – 90% of Carbon |
| Column ‘A’ | Column ‘B’ |
| (1) Diamond (2) Fullerenes (3) Graphite | (a) Hexagonal layered structure (b) Tetragonal three-dimensional structure (c) Geodesic dome |
With the help of ne abelled diagram explain the following : Biogas plant.
With the help of ne abelled diagram explain the following : Regular fire extinguisher.
Production of water gas:
Production of methane gas in biogas plant.
Methane and Chlorine gases react with each other.
Methane gas is burnt in air:
Sodium bicarbonate reacts with dilute Sulphuric acid, $($reaction in fire extinguisher$):$
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