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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1001. |
____________ is the change of water from its gaseous form (water vapour) into liquid water. |
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Answer» ____________ is the change of water from its gaseous form (water vapour) into liquid water. |
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| 1002. |
Explain the following observation very briefly.Breathing through mouth may harm you. |
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Answer» Explain the following observation very briefly. Breathing through mouth may harm you. |
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| 1003. |
A. A gas exerts pressure on the walls of the container. Why?B. Define interconversion of states of matter. What are the two factors responsible for the change of states of matter?C. What are the characteristics of the particles of matter?D. Give reason:A gas can fill the whole vessel in which it is enclosed. |
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Answer» A. A gas exerts pressure on the walls of the container. Why? B. Define interconversion of states of matter. What are the two factors responsible for the change of states of matter? C. What are the characteristics of the particles of matter? D. Give reason: A gas can fill the whole vessel in which it is enclosed. |
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| 1004. |
When we mix oil in a glass of water, two things happen: 1) The oil does not mix with water. 2) It settles on top of water making a separate layer. What is the reason for these two phenomena? Mention the property being exhibited by the oil. [3 MARKS] |
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Answer» When we mix oil in a glass of water, two things happen: 1) The oil does not mix with water. 2) It settles on top of water making a separate layer. What is the reason for these two phenomena? Mention the property being exhibited by the oil. [3 MARKS] |
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| 1005. |
WHat is tension and how to calculate tension between different masses |
| Answer» WHat is tension and how to calculate tension between different masses | |
| 1006. |
13. When we burn sugar it changes into black liquid. give reason |
| Answer» 13. When we burn sugar it changes into black liquid. give reason | |
| 1007. |
Suppose you are outside your home and an earthquake strikes. What precaution would you take to protect yourself? [3 MARKS] |
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Answer» Suppose you are outside your home and an earthquake strikes. What precaution would you take to protect yourself? [3 MARKS] |
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| 1008. |
Reema and Suma have pots of the same size. of Rema’s pot are filled with water. Suma pours water from her pot to Rema’s pot till it is full. How much water remains in Suma’s pot now? |
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Answer» Reema and Suma have pots of the same size. |
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| 1009. |
We see camphor and naphthalene balls growing smaller as time passes. Why does this happen? |
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Answer» We see camphor and naphthalene balls growing smaller as time passes. Why does this happen? |
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| 1010. |
A formula of a compound having its constituents as X and Y is X2Y3. What can be the formula of the chloride if the element X forms one? |
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Answer» A formula of a compound having its constituents as X and Y is X2Y3. What can be the formula of the chloride if the element X forms one? |
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| 1011. |
Why gases are .highly compressible ? |
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Answer» Why gases are .highly compressible ? |
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| 1012. |
Among the substances: gold, air, water and oil, partciles of which substance are most tightly packed and why? |
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Answer» Among the substances: gold, air, water and oil, partciles of which substance are most tightly packed and why? |
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| 1013. |
What is the shape of chcl3 |
| Answer» What is the shape of chcl3 | |
| 1014. |
Painting a metal prevents it from corroding. Why? |
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Answer» Painting a metal prevents it from corroding. Why? |
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| 1015. |
Question 09 Which of the following statements is not true? (a) Materials are grouped for convenience (b) Materials are grouped to study their properties (c) Materials are grouped for fun (d) Materials are grouped according to their uses |
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Answer» Question 09 Which of the following statements is not true? (a) Materials are grouped for convenience (b) Materials are grouped to study their properties (c) Materials are grouped for fun (d) Materials are grouped according to their uses |
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| 1016. |
What is potable water? List out four characteristics of potable water? |
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Answer» What is potable water? List out four characteristics of potable water? |
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| 1017. |
Question 3Clear, transparent water is always fit for drinking. Comment. |
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Answer» Question 3 |
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| 1018. |
What are synthetic fibres? Give two examples. [3 MARKS] |
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Answer» What are synthetic fibres? Give two examples. [3 MARKS] |
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| 1019. |
What are the meanings of following symbols? Write your role accordingly? |
Answer» What are the meanings of following symbols? Write your role accordingly?
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| 1020. |
State the biological importance of the presence of dissolved oxygen and CO2 in river water. |
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Answer» State the biological importance of the presence of dissolved oxygen and CO2 in river water. |
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| 1021. |
Which of the following diagrams best depicts the way we see objects? |
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Answer» Which of the following diagrams best depicts the way we see objects? |
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| 1022. |
Mettez les phrases au féminin.1. Le garçon indien est sympathique et souriant.2.L'homme est américain; il est gros.3. Le directeur est vieux.4. L'acteur a un petit frère.5. C'est un bon étudiant. |
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Answer» Mettez les phrases au féminin. 1. Le garçon indien est sympathique et souriant. 2.L'homme est américain; il est gros. 3. Le directeur est vieux. 4. L'acteur a un petit frère. 5. C'est un bon étudiant. |
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| 1023. |
Question 8Match the following: Materials / Objects Property of material/object Gold and silver Opaque Wax Soluble in water Air and glass Floats on water Cardboard Metallic lustre Sugar Transparent |
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Answer» Question 8 Match the following:
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| 1024. |
Why is water useful to life on the earth?(i) It maintains ecological balance.(ii) It sustains life.(iii) It is necessary for respiration in aquatic organisms. |
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Answer» Why is water useful to life on the earth? |
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| 1025. |
What is carbon? |
| Answer» What is carbon? | |
| 1026. |
what is the formula of rusting of iron |
| Answer» what is the formula of rusting of iron | |
| 1027. |
Define the various constituents of air ?? |
| Answer» Define the various constituents of air ?? | |
| 1028. |
Salt water is a classic example of ___ mixture . |
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Answer» Salt water is a classic example of |
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| 1029. |
find equivalent weight of MxO |
| Answer» find equivalent weight of MxO | |
| 1030. |
In most parts of India pure nylon or polyester clothes are not worn. Why? |
| Answer» In most parts of India pure nylon or polyester clothes are not worn. Why? | |
| 1031. |
What do the terms malleable and ductile mean?. |
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Answer» What do the terms malleable and ductile mean?. |
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| 1032. |
Teflon is a |
| Answer» Teflon is a | |
| 1033. |
The molecules of water, ice and steam are the same. Do you agree? |
| Answer» The molecules of water, ice and steam are the same. Do you agree? | |
| 1034. |
Question 12'Avoid plastics as far as possible'. Comment on this advice. |
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Answer» Question 12 |
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| 1035. |
The phenomenon of marble cancer is due to |
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Answer» The phenomenon of marble cancer is due to |
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| 1036. |
Which of the following statements is correct about a freely falling body? 1. Total energy is constant. 2. Potential energy changes into kinetic energy. 3. Potential energy decreases. 4. Kinetic energy increases. |
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Answer» Which of the following statements is correct about a freely falling body? |
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| 1037. |
Paheli was feeling thirsty but there was only a pot of water at home which was muddy and unfit for drinking. How do you think Paheli would have made this water fit for drinking if the following materials were available to her. [Alum, tub, muslin cloth, gas stove, thread, pan, and lid.] |
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Answer» Paheli was feeling thirsty but there was only a pot of water at home which was muddy and unfit for drinking. How do you think Paheli would have made this water fit for drinking if the following materials were available to her. [Alum, tub, muslin cloth, gas stove, thread, pan, and lid.] |
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| 1038. |
Give two examples for each of the following cases:(a) Physical changes which are reversible.(b) Physical changes which are not reversible.(c) Chemical changes. |
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Answer» Give two examples for each of the following cases: (a) Physical changes which are reversible. (b) Physical changes which are not reversible. (c) Chemical changes. |
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| 1039. |
Why spoiling food is not a desirable change? |
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Answer» Why spoiling food is not a desirable change? |
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| 1040. |
How was fire discovered? |
| Answer» How was fire discovered? | |
| 1041. |
Which of the following plant product is the hardest in nature? |
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Answer» Which of the following plant product is the hardest in nature? |
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| 1042. |
Question 10Differentiate between evaporation and boiling? |
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Answer» Question 10 Differentiate between evaporation and boiling? |
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| 1043. |
how wood and milk can be heterogeous ? |
| Answer» how wood and milk can be heterogeous ? | |
| 1044. |
Ravi has a mixture of sugar and small pieces of stones. He wants to separate the two materials. What are the processes which he can use to separate the items? Explain. [5 MARKS] |
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Answer» Ravi has a mixture of sugar and small pieces of stones. He wants to separate the two materials. What are the processes which he can use to separate the items? Explain. [5 MARKS] |
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| 1045. |
Explain the process involved in the water cycle? |
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Answer» Explain the process involved in the water cycle? |
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| 1046. |
What is Vandana’s profession? |
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Answer» What is Vandana’s profession? |
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| 1047. |
Complete the given table. Forms of water Process by which formed Location where found (a) Liquid (b) Solid (c) Gaseous |
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Answer» Complete the given table.
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| 1048. |
Question 28Write True/False against the following statements and also correct the false statement.(a) A physical process in which a substance reacts with oxygen to give off heat is called combustion(b) Water is the best extinguisher for fires involving electrical equipment(c) Alcohol, CNG and LPG are inflammable substances.(d) Increased concentration of nitrogen in air is believed to cause global warming.(e) Greater the calorific value, better is the fuel(f) Middle zone is the hottest zone of a flame.(g) The substances which vapourise during burning, give the flame |
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Answer» Question 28 Write True/False against the following statements and also correct the false statement. (a) A physical process in which a substance reacts with oxygen to give off heat is called combustion (b) Water is the best extinguisher for fires involving electrical equipment (c) Alcohol, CNG and LPG are inflammable substances. (d) Increased concentration of nitrogen in air is believed to cause global warming. (e) Greater the calorific value, better is the fuel (f) Middle zone is the hottest zone of a flame. (g) The substances which vapourise during burning, give the flame |
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| 1049. |
Explain the following term ii) precipitation |
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Answer» Explain the following term ii) precipitation |
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| 1050. |
Question 18 During summer holidays, a group of children collected a lump of salt, green grass, broken glass piece, a small thermocol box, pen, iron nail, glass marbles, hair, naphthalene ball, a piece of sugar candy (mishri) and tried to group them on the basis of properties given in table. Help them in filling the table. Name of theAppearanceTransparencyFloats/SinksSoluble/Material(Hard/Soft)(Transparent/in waterinsoluble inTranslucent/Opaque)Water.................................................................................................... |
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Answer» Question 18 During summer holidays, a group of children collected a lump of salt, green grass, broken glass piece, a small thermocol box, pen, iron nail, glass marbles, hair, naphthalene ball, a piece of sugar candy (mishri) and tried to group them on the basis of properties given in table. Help them in filling the table. Name of theAppearanceTransparencyFloats/SinksSoluble/Material(Hard/Soft)(Transparent/in waterinsoluble inTranslucent/Opaque)Water.................................................................................................... |
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of Rema’s pot are filled with water. Suma pours water from her pot to Rema’s pot till it is full. How much water remains in Suma’s pot now?