The general molecular formula for the homologous series of alkynes is _______.
- A$C _{ n } H _{2 n }$
- B$C _{ n } H _{2 n +2}$
- ✓$C _{ n } H _{2 n -2}$
- D$C _{ n } H _{2 n -1}$
Answer: C.
View full solution →Question types
[ Question Bank ] - 2022 question types
839 questions across 17 question groups — pick any mix to generate a Science paper with step-by-step answer keys.
839
Questions
17
Question groups
5
Question types
01
M.C.Q
128 Q→02Answer the following questions:[1 M]
107 Q→03Give scientific reasons: [2 M]
69 Q→04Answer the following questions: [2 M]
87 Q→05Answer the following questions: [3 M]
77 Q→06Answer the following questions: [5 M]
75 Q→07Write True or False
89 Q→08Name the Following
38 Q→09Define :
26 Q→10Find An Odd One Out
37 Q→11Distinguish Between :
15 Q→12Find the correlation.
44 Q→13Complete the incomplete sentance.
5 Q→14Identify who I am.
4 Q→15Match the following.
19 Q→16Explain the following reaction with the balanced equation.
13 Q→17Draw a neat labelled diagram.
6 Q→Sample Questions
[ Question Bank ] - 2022 questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Aluminium oxide is _______ oxide.
- Aacidic
- Bbasic
- Cneutral
- ✓amphoteric
Answer: D.
View full solution →In a relaxed state, the focal length of healthy eyes is _______.
- ✓2 cm
- B2.5 cm
- C25 cm
- D5 cm
Answer: A.
View full solution →The process of separation of light into its component colours while passing through a medium is called _______.
- Areflection of light
- Brefraction of light
- ✓dispersion of light
- Dabsorption of light
Answer: C.
View full solution →The SI unit of specific heat is _______.
- Akcal
- Bcal
- Ccal/g °C
- ✓J/kg °C
Answer: D.
View full solution →What are catalysts?
Name any two appliances which works on the phenomenon of heating effect of electric current.
Give two examples of alloy.
What is an alloy?
Write the molecular formulae of the following compound.
Ferrous tungstate
Ferrous tungstate
Write scientific reason.
Coins are made from metals and alloys.
Coins are made from metals and alloys.
Give scientific reason:
We cannot clearly see an object kept at a distance less than 25 cm from the eye.
We cannot clearly see an object kept at a distance less than 25 cm from the eye.
Write scientific reason.
Placing a plastic bottle filled with water in the freezing compartment in the freezer can cause the bottle to explode.
Placing a plastic bottle filled with water in the freezing compartment in the freezer can cause the bottle to explode.
Write scientific reason.
In a group, the size of the atom increases as it goes down from the top.
In a group, the size of the atom increases as it goes down from the top.
Write scientific reason.
Magnetic separation method is used to separate the magnetic ingredients in the ores.
Magnetic separation method is used to separate the magnetic ingredients in the ores.
If in a medium, the speed of light is $1.5 \times 10^8 m/s$ how much will the absolute refractive index of that medium be?
View full solution →Write the characteristics of ethanol.
State the laws of refraction of light.
Classify the following elements into Metals and Nonmetals.
S, Mg, Al, P, N, Na.
S, Mg, Al, P, N, Na.
Electronic configuration of element A is 2,8,1. Answer the following questions based on this information.
- What is the atomic number of element A?
- Find the group to which this element belongs.
Write a short note.
Aromatic hydrocarbons
Aromatic hydrocarbons
Write a short note.
Homologous series
Homologous series
Write a short note.
Functional groups in carbon compounds
Functional groups in carbon compounds
Write a short note.
Characteristics of carbon
Characteristics of carbon
Write a short note.
Free Fall
Free Fall
Write a short note.
Regelation
Regelation
Write a short note.
Dew point temperature
Dew point temperature
Write a short note.
Specific heat capacity
Specific heat capacity
Write a short note.
Anomalous behaviour of water
Anomalous behaviour of water
Write a short note.
Moon missions
Moon missions
In LPG, butane is a flammable component.
Right
Wrong
Diamond is a hard substance.
Right
Wrong
Vision defect that increases distance between the lens of the eye and retina of the eye is termed as myopia.
Right
Wrong
Humidity relative to dew point temperature is 100%.
Right
Wrong
Nanometer unit is used to measure atomic radius.
Right
Wrong
Write the name.
The process of extraction of aluminium from alumina-
The process of extraction of aluminium from alumina-
Write the name.
The persons which are unable to distinguish between different colours
The persons which are unable to distinguish between different colours
Write the name and symbol of the element from the description.
The most electronegative atom.
The most electronegative atom.
Write the name.
The process of strong heating of carbonate ores in insufficient air–
The process of strong heating of carbonate ores in insufficient air–
Write the name.
The sensation on the retina persists for a while is
The sensation on the retina persists for a while is
Write scientific reason.
Adding zinc particles to a solution of copper sulphate makes the blue solution colorless.
Adding zinc particles to a solution of copper sulphate makes the blue solution colorless.
Give scientific reason.
It takes time for pieces of Shahabad tile to disappear in HCl, but its powder disappears rapidly.
It takes time for pieces of Shahabad tile to disappear in HCl, but its powder disappears rapidly.
Give scientific reason.
When the gas formed on heating limstone is passed through freshly prepared lime water, the lime water turns milky.
When the gas formed on heating limstone is passed through freshly prepared lime water, the lime water turns milky.
Give scientific reason.
It is reccommended to use air tight container for storing oil for long time.
It is reccommended to use air tight container for storing oil for long time.
Write scientific reason.
Always paint grills of doors and windows before using them.
Always paint grills of doors and windows before using them.
Find the odd one out and give its explanation.
Potassium
Magnesium
Calcium
Beryllium
Find the odd one out and give its explanation.
Carbon
Calcium
Oxygen
Neon
Find the odd one out and give its explanation.
Na
K
Cu
Li
Find the odd one out and give its explanation.
Fluorine
Boron
Bromine
Chlorine
Find the odd one out and give its explanation.
Zinc coating
Tinning
Electroplating
Calcination
Distinguish between:
Mendeleev’s periodic table - Modern periodic table
Mendeleev’s periodic table - Modern periodic table
Distinguish between:
Alkane - Alkene
Alkane - Alkene
Distinguish between:
Froth floatation - Leaching
Froth floatation - Leaching
Distinguish between:
Myopia - Presbyopia
Myopia - Presbyopia
Distinguish between:
Group $17$ - Group $18$
View full solution →Group $17$ - Group $18$
Diamond : electric insulator : : _______ : electric conductor
Rusting of iron : $Fe_2O_3$ : : corrosion of copper : ______
View full solution →
: Object near the lens : : ______ : 
Iodine : solid : : bromine : _______
Zinc sulphide : Roasting : : zinc carbonate : _______
According to Dobereiner’s triads rule, three elements in an increasing order of atomic mass shows _______.
Electropositivity means _______.
The number of electrons in the outermost shell of an atom determines the _______.
According to Mendeleev’s periodic law properties of elements are ______.
According to Newland’s octave rule, chlorine shows similarity with fluorine. Because chlorine is _______.
Identify who I am!
Metal in Liquid state- _______
Metal in Liquid state- _______
Identify who I am!
Ore of Aluminum- ______
Ore of Aluminum- ______
Identify who I am!
Amphoteric oxide forming metal- _______
Amphoteric oxide forming metal- _______
Identify who I am!
Carbon allotropes- _______
Carbon allotropes- _______
Match the columns.
| Group A | Group B |
| 1. Making sheets of metals | a) Sonority |
| 2. Making metal utensils | b) Malleability |
| 3. Making Copper wires | c) Good conductor of heat |
| 4. Making bells from metal | d) Ductility |
Match the columns.
| Group A | Group B |
| 1) Electroplating | a) Pressure cooker |
| 2) Anodising | b) Silver plated spoons |
| c) Coating of tin on copper | |
| d) Coating of Zinc on iron |
Match the columns.
| Column A | Column B |
| 1) Alkaline earth metals | a) Group 18 |
| 2) Alkali metals | b) Group 17 |
| 3) Halogen | c) Group 2 |
| 4) Noble gas | d) Group 1 |
| e) Group 14 |
Match the columns.
| Group A | Group B |
| 1) Copper and Zinc | a) Brass |
| 2) Copper and Tin | b) Bronze |
| c) Stainless steel |
Match the columns.
| Column A | Column B |
| Electronic configuration | Valency |
| 1) 2, 2 | a) 1 |
| 2) 2, 8, 1 | b) 2 |
| 3) 2, 5 | c) 3 |
| d) 5 |
Write chemical equation for the event.
Electrolysis of alumina is done.
Electrolysis of alumina is done.
Explain the following reaction with the balanced equation.
Ferric oxide is reacted with aluminium.
Ferric oxide is reacted with aluminium.
Write chemical equation for the event.
Iron filings are dropped in aqueous solution of copper sulphate.
Iron filings are dropped in aqueous solution of copper sulphate.
Explain the following reaction with the balanced equation.
Sodium aluminate reacts with water
Sodium aluminate reacts with water
Explain the following reaction with the balanced equation.
Chlorine dissolved in water
Chlorine dissolved in water
Draw a neat labelled diagram.
Anodizing
Anodizing
Draw a neat labelled diagram.
Electroplating
Electroplating
Draw a neat labelled diagram.
Hydraulic separation method.
Hydraulic separation method.
Draw a neat labelled diagram.
Electrolytic reduction of alumina.
Electrolytic reduction of alumina.
Draw a neat labelled diagram.
Froth floatation method.
Froth floatation method.
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