CBSE > Class 08 > Science | CBSE Board | Homework Help

The advantages of using CNG and LPG as fuels are :- A) non polluting fuels for vehicles B) it is used for power generation C) it can be used directly for burning in homes and factories D) they are more efficient

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Sudha 2002 2 years, 1 month ago

1.They have low caloforic value 2.can be transported easily 3.They are clean fluids do not give burn and smoke

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taking out paste from a toothpaste tube. which force is used in it

Posted by Vihaan Chokshi 8Th 2 years, 2 months ago

CBSE > Class 08 > Science

3 answers

Jinansh Dave 2 years, 2 months ago

Muscular force

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Karthik K 2 years, 2 months ago

Muscular force

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Kushagra Bajpai 2 years, 2 months ago

Muscular force

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What is the meaning ecosystem

Posted by Vansh Panwar 2 years, 2 months ago

CBSE > Class 08 > Science

2 answers

Yatharth Agrawal 2 years, 2 months ago

It includes all living organisms and their habitat and their interaction with non living components of the environment like sunlight, air,water and land

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Abhishek Kumar 2 years, 2 months ago

A biological community of interacting organisms and their physical environment.

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Write 2 way through which we can prevent noise pollution

Posted by Sai Prasad Jena 2 years, 2 months ago

CBSE > Class 08 > Science

1 answers

Kushagra Bajpai 2 years, 2 months ago

1- Vehicles should be fitted with soft horns 2- Musical instruments, television, radios should played in low volume

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Two physical property of metal

Posted by Saksham Modanwal Modanwal 2 years, 2 months ago

CBSE > Class 08 > Science

5 answers

Kushagra Bajpai 2 years, 2 months ago

1- Metals are malleable 2- Metals are ductile

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Prakhar Jain 2 years, 2 months ago

Metals are good conductor of heat and electricity

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Prakhar Jain 2 years, 2 months ago

Metals can be ductility

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Pawar Vibhavari ♥️🧿 2 years, 2 months ago

Following are two properties of Metals: 1.Metals are sonorous 2.Metals are lustrous

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Saksham Modanwal Modanwal 2 years, 2 months ago

Metals are ductile Metals are lusturd

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Name two man made substance,two natural and two exhaustible substance

Posted by Misba Fathima 2 years, 2 months ago

CBSE > Class 08 > Science

4 answers

Ansh Yadav 2 years, 2 months ago

Home rode park man made resources Natural resources gas petroleum coal water are exchustible

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Yatharth Agrawal 2 years, 2 months ago

Home,building man made Oil,coal natural Natural gas,petroleum exhaustible

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Kushagra Bajpai 2 years, 2 months ago

MAN MADE- 1- Plastic 2- Glass NATURAL - 1- Water 2- Forest EXHASTIBLE-1- COAL 2- Petroleum

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Gungun Tagore 2 years, 2 months ago

Man made substances :- utensils , plastic Two natural :- sun ,metal Exhaustible :- Coal , petrol

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What is the full Frome of CNG?

Posted by Rezalin Kumar 2 years, 2 months ago

CBSE > Class 08 > Science

5 answers

Kavita Meena 2 years, 2 months ago

Compressed natural gas

1Thank You

Daksh Bais 2 years, 2 months ago

1Thank You

Kimaya Yadav 2 years, 2 months ago

Compressed Natural Gas

1Thank You

Gungun Tagore 2 years, 2 months ago

Compressed Natural Gas

1Thank You

Ayush Binu 2 years, 2 months ago

Compressed natural gas

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Definition of coal tar

Posted by Kavya Prasad 2 years, 2 months ago

CBSE > Class 08 > Science

4 answers

Ansh Yadav 2 years, 2 months ago

Coal tar is used to manufactured a stell spell moth

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Yatharth Agrawal 2 years, 2 months ago

A thick viscous layer formed below the ammonical liquor

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Kushagra Bajpai 2 years, 2 months ago

Coal tar is a thick black coloured fluid produced when coal is heated. It is a mixture of compounds like benzene, naphthelene, phenol etc. which can seprated by frational destillation.

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Sardarji Dancer 2 years, 2 months ago

a thick black liquid produced by distilling bituminous coal, containing benzene, naphthalene, phenols, aniline, and many other organic chemicals.

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I am black in colour produce heat on burning and breaking into pieces on hammering

Posted by Khushi Giri 2 years, 2 months ago

CBSE > Class 08 > Science

5 answers

Saksham Modanwal Modanwal 2 years, 2 months ago

Coal

1Thank You

Sardarji Dancer 2 years, 2 months ago

Coal

1Thank You

Gungun Tagore 2 years, 2 months ago

Coal

1Thank You

Saksham Kumar 2 years, 2 months ago

Iron or coal

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Lalit Kumar 2 years, 2 months ago

Coal

2Thank You

ANSWER

What is called as nylon

Posted by Loknath Sivaraman 2 years, 2 months ago

CBSE > Class 08 > Science

1 answers

Kushagra Bajpai 2 years, 2 months ago

Nylon is a first completely sythetic fibre. It is strongest fibre and also durable

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The top layer of soil is exposed

Posted by Pathan Rehan Khan Pathan Rehan Khan 2 years, 2 months ago

CBSE > Class 08 > Science

1 answers

Sudha 2002 2 years, 1 month ago

If the top layer of soil is exposed , gradually the bottom layer of soil will also exposed ,The soil is hard and rocky,These type of soils are less fertile with least amount humus.

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The following table shows the total power shortage in india from 1991.1997 show the data in the form of graph plot shortage percentage for the years on the y axis and the year on the x axis

Posted by Bharath S C Bharath S C 2 years, 2 months ago

CBSE > Class 08 > Science

1 answers

Bharath S C Bharath S C 2 years, 2 months ago

2Thank You

ANSWER

What is meant by efficiency of fuel

Posted by Natik Bakshani Bakshani 2 years, 2 months ago

CBSE > Class 08 > Science

1 answers

Sushrita Mitra 2 years, 2 months ago

Fuel efficiency is a form of thermal efficiency, it means the ratio of effort to result of a process that converts chemical potential energy contained in a carrier (fuel) into kinetic energy or work.

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In Reaction of water if example is sodium (Na) + water ( h^2o) = NaOh( in this from where Oh comes ) + H2

Posted by Muskan . 2 years, 2 months ago

CBSE > Class 08 > Science

1 answers

Yatharth Agrawal 2 years, 2 months ago

It is sodium hydroxide it comes because one molecule of hydrogen and one of oxygen and it will come 2H^20

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Aluminium oxide and zinc oxide are in nature?

Posted by Kartik Ghuraiya 2 years, 2 months ago

CBSE > Class 08 > Science

3 answers

Yatharth Agrawal 2 years, 2 months ago

Basic

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Sonit Shandilya 2 years, 2 months ago

They are Basic in Nature

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B. Gupta 2 years, 2 months ago

Basic

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By futher oxidation of sulphur dioxide what is form ?

Posted by Kartik Ghuraiya 2 years, 2 months ago

CBSE > Class 08 > Science

1 answers

Kartik Ghuraiya 2 years, 2 months ago

So3 sulphur trioxide

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Name two catalist which is used haber process of making amonia

Posted by Kartik Ghuraiya 2 years, 2 months ago

CBSE > Class 08 > Science

1 answers

Kartik Ghuraiya 2 years, 2 months ago

Mollidanam and iron Fe and Mo

1Thank You

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State some beneficial effects of bacteria

Posted by Raja Singh 2 years, 2 months ago

CBSE > Class 08 > Science

2 answers

Kartik Ghuraiya 2 years, 2 months ago

Like lactobacillus bacteria helps to make milk into curd. Rhizobium,nostac, anabaena helps in balancing nitrogen.denitrifying bacteria like thyobacillus and nusdomonas.

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Master Gaming Hgg 2 years, 2 months ago

Cell organism

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Chapter 13

Posted by Kartik Shakya 2 years, 3 months ago

CBSE > Class 08 > Science

2 answers

Sardarji Dancer 2 years, 2 months ago

Sound

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Yatharth Singh Chauhan 2 years, 2 months ago

1Thank You

ANSWER

Which is can prevent sexually transmitted disease?

Posted by Kanishk Sami 2 years, 3 months ago

CBSE > Class 08 > Science

1 answers

Kartik Ghuraiya 2 years, 2 months ago

AIDS is the disease which is cause by blood transmission to prevent this we should not take of a sick person or infected person . I hope it helps

1Thank You

ANSWER

............ is the 1st National park in India

Posted by Barsha Priyadarshini 2 years, 3 months ago

CBSE > Class 08 > Science

5 answers

Kartik Ghuraiya 2 years, 2 months ago

Jim Corbett National park in 1936

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Ansh Sharma 2 years, 2 months ago

Satpura National Park

1Thank You

Yatharth Singh Chauhan 2 years, 2 months ago

Jim Corbett national park

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Krishna Yadav 2 years, 3 months ago

Jim Corbett National park

2Thank You

Abhishek Kumar 2 years, 3 months ago

Hailey National Park

1Thank You

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Mind map on anode

Posted by Thamarai Kannan 2 years, 3 months ago

CBSE > Class 08 > Science

0 answers

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Yeast is used in both baking as well as alcohol industry. a) Which process in yeast makes it useful in these industries? b) How is yeast useful in baking and making alcohol?

Posted by Kalpana Bhanushali 2 years, 3 months ago

CBSE > Class 08 > Science

1 answers

Kalpana Bhanushali 2 years, 3 months ago

a)Through the process of fermentation, yeast converts sugars into carbon dioxide and alcohol. These two byproducts make yeast an extremely useful tool in food production. b) Carbon dioxide is what gives alcoholic beverages such as beer and champagne their characteristic bubbles and is also responsible for rising bread.

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ANSWER

What is the meaning of pasteurisation and pasteurization

Posted by Priya Singh 2 years, 3 months ago

CBSE > Class 08 > Science