CBSE > Class 10 > Science | CBSE Board | Homework Help

1. Covax lens because it coverage the rays at a point 2.ram feel pain because after refraction the rays of sunlight coverage at point that is to strong and damage the skin 3.it is very bad behavior of rajesh with ram

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How to make baking powder

Posted by Rishika Kalladka 2 years, 4 months ago

CBSE > Class 10 > Science

3 answers

Arpit Yadav 2 years, 4 months ago

Baking soda + cream of tartar + cornstarch. Less basic

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Supreet Satya 2 years, 4 months ago

On heating baking soda, a reaction takes place. The reaction is as follows NaHCO³+H+ion(from any acid) ------> CO2 + H2O + Baking power. Baking soda ki more basic but Baking power is less basic

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Sanjeevani Mishra 2 years, 4 months ago

Baking soda + cream of tartar + cornstarch

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A bulb having power rating as 60W 220V is connected across 110V how much power will be expanded by the bulb

Posted by Sidhu Moosewala 2 years, 4 months ago

CBSE > Class 10 > Science

0 answers

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When electric current is pass through acidified water ,it decomposes to give hydrogen gas oxygen gas . Represent the reaction as and mention it's type

Posted by Damini Kashyap 2 years, 4 months ago

CBSE > Class 10 > Science

3 answers

Daksh Verma 2 years, 3 months ago

Unbalanced ->h2O------->h2+O2 Balanced->2H2O-------->H2+O2

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Sanjeevani Mishra 2 years, 4 months ago

Electrolytic decomposition reaction

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Anuradha Devi 2 years, 4 months ago

2H2O---H2+ O2

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Name of HCl

Posted by Aritra Ray Chaudhuri 2 years, 4 months ago

CBSE > Class 10 > Science

5 answers

Sanjeevani Mishra 2 years, 4 months ago

In liquid form it is hydrochloric acid & in gasous state it is hydrogen chloride.

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Anuradha Devi 2 years, 4 months ago

Hydro chloric acid

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Fahim Akhtar 2 years, 4 months ago

Hydrogen chloride

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Anusha Machappanavar 2 years, 4 months ago

Hydrochloric acid

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Vikram Kumar 2 years, 4 months ago

Hydrochloric acid

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Study the following data and write which set of value should be rejected so that ohm’s law holds good for the remaining set of values. Draw the graph and find out the mean resistance (3)

Posted by Reneva Attri 2 years, 4 months ago

CBSE > Class 10 > Science

0 answers

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A student working in a laboratory prepared an aqueous solution of silver nitrate and kept it in a glass beaker has developed black turbidity 1 Why did the develop black turbidity? 2 In our opinion what precaution he should have taken?

Posted by Khushi Kumari 2 years, 4 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Chemistry chapter 2 activity solutions.

Posted by Aarav Sood 2 years, 4 months ago

CBSE > Class 10 > Science

0 answers

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Project on diversity of food Webs of Arunachal Pradesh And Meghalaya

Posted by Naincy Agarwal 2 years, 4 months ago

CBSE > Class 10 > Science

0 answers

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Project on diversity of food Webs of Arunachal Pradesh And Meghalaya

Posted by Naincy Agarwal 2 years, 4 months ago

CBSE > Class 10 > Science

0 answers

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Tearing of paper and breaking of glass is a physical or chemical change??

Posted by Eshna Agrawal 2 years, 4 months ago

CBSE > Class 10 > Science

5 answers

Aryan Yadav 2 years, 4 months ago

Physical change

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Sanjeevani Mishra 2 years, 4 months ago

Generally , physical changes are reversible

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Happy Singh 2 years, 4 months ago

Physical change

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Aritra Ray Chaudhuri 2 years, 4 months ago

Its a physical change bcz only the physical properties are changed

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Ayush Kumar 2 years, 4 months ago

Physical change because it does not change their state they change in shape.

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Why a silver bromide is stored in dark coloured bottles in the laboratories? Write the chemical equation to justify your answer.

Posted by Wani Bhavik Hans 2 years, 4 months ago

CBSE > Class 10 > Science

1 answers

Wani Bhavik Hans 2 years, 4 months ago

Dark-colored bottles block the flow of light, preventing light from reaching silver chloride in the bottles and preventing its disintegration. In the presence of sunlight, silver chloride disintegrates to silver and chlorine, which function as a filter, preventing the reactions.

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A student found that v and u are the same in a concave mirror. What is the possible value of f and c

Posted by Rishika Kalladka 2 years, 4 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Explain 4 modes of nutrition

Posted by Daksh Butani 2 years, 4 months ago

CBSE > Class 10 > Science

1 answers

Sakshi Kumari 2 years, 4 months ago

Saprophytic nutrition Holozic nutrition Parasitic nutrition

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Nutrition in unicelluler organism

Posted by Kuldeep Sharma 2 years, 4 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Pick the incorrect words

Posted by Sapna Gupta 2 years, 4 months ago

CBSE > Class 10 > Science

1 answers

Sapna Gupta 2 years, 4 months ago

In bases the ions released.in water are not H positive ions but OH negative ions also called hydroxyl ions

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a parallel beam of light is made to fall on a concave mirror and images from at a distance of 7.5 from the from the well of find out the focal length of the mirror

Posted by Jai Datta 2 years, 4 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

What is necessary conditions for autotrophic nutrition and what are its by products

Posted by Sai Venkat 2 years, 4 months ago

CBSE > Class 10 > Science

1 answers

Jai Datta 2 years, 4 months ago

For Autotrophic nutrition is necessary to convert in organic materials to organic materials

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If HCl react with copper what colour will take place? Write the chemical formula for it.

Posted by Lony Talukdar 2 years, 4 months ago

CBSE > Class 10 > Science

1 answers

Sureksha Sp 2 years, 4 months ago

Copper does not react with hydrochloric acid because copper is below hydrogen in the reactivity series

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100 scientific fruit name

Posted by Kuldeep Sharma 2 years, 4 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

HCL ki sodium carbonate se abhikriya karne per kaun si gas nikalti hai tatha uska parikshan aap kaise karenge

Posted by Srishti Singhania 2 years, 4 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

HCL ki sodium carbonate se abhikriya karne per kaun si gas nikalti hai tatha uska parikshan aap kaise karenge

Posted by Srishti Singhania 2 years, 4 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Why is CO2 mostly transported in dissolved form?

Posted by Chandana Chandana 2 years, 4 months ago

CBSE > Class 10 > Science

2 answers

Akshita Goyal 2 years, 4 months ago

CO2 is more soluble in water than oxygen, hence it is transported mostly in the dissolved form in our blood.

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Khwahis Parveen 2 years, 4 months ago

CO2 is more soluble in water than oxygen, hence it is transported mostly in the dissolved form in our blood.

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What is the difference between aerobic and anaerobic respiration

Posted by Shaikh Azim 2 years, 4 months ago

CBSE > Class 10 > Science

2 answers

Khwahis Parveen 2 years, 4 months ago

Aerobic respiration: •It occurs in the presence of oxygen. Anaerobic respiration: •Occurs in the absence of oxygen. Aerobic respiration; •It takes place in the cytoplasm (glycolysis) and mitochondria (Kreb's cycle). Anaerobic respiration: •The entire process takes place in the cytoplasm.

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Sanchita Banik 2 years, 4 months ago

Aerobic utilizes the oxygen Anaerobic does not utilizes the oxygen

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What is the sample solution of red litmus papar And blue litmus paper phenolphtalien solution And methyl Orange solution of HCL

Posted by Afra Nausheen 2 years, 4 months ago

CBSE > Class 10 > Science