Q.5 Exe 12.3 || Algebraic Expressions Class-7 Math|| NCERT Math CBSE

Q.4 Exe 12.3 || Algebraic Expressions Class-7 Math|| NCERT Math CBSE

Q.3 Exe 12.3 || Algebraic Expressions Class-7 Math|| NCERT Math CBSE

Q.2 Exe 12.3 || Algebraic Expressions Class-7 Math|| NCERT Math CBSE

Q.1 Exe 12.3 || Algebraic Expressions Class-7 Math|| NCERT Math CBSE

State how carbon monoxide finds application in i] the metallurgy of iron

Convert carbon monoxide to carbon dioxide using two different methods

reasons for carbon monoxide, icse std-8 chemistry

function of Con. Sulphuric acid in the laboratory preparation of carbon monoxide from oxalic acid

using Magnesium ribbon, how would you prove that a given gas jar contains carbon dioxide.

Explained the term dry ice. State its application.

carbon dioxide is bubbled in to lime water the lime water turns milky , & with excess its disappear.

how would you convert carbon dioxide to a metallic carbonate using a basic oxide e.g sodium oxide.

Starting from carbon dioxide how would you obtained a) Weak acid b) A fertilizer

a)Carbon dioxide doe not support combustion b) It is slightly acidic in nature

carbon dioxide by action of a dilute acid on a metallic carbonate give a balanced equation & reasons

State three methods how carbon dioxide is added to the atmosphere.

wood charcoal- an amorphous allotrope of carbon reduces heated metallic oxides to metals.

Reasons for use of diamond and graphite, icse chemistry std-8, carbon and its compounds

State in brief the transformation of vegetable matter to different types of coal

why diamond is inert or unreactive while graphite is comparably more reactive

Structural comparison of carbon allotrophs- carbon & its compounds, ICSE chemistry Std-8

Name two crystalline and four amorphous allotropes of carbon

Define the term: allotropy. Give a reason why carbon exhibits allotropy

State how carbon occurs in free state and in the combined state.

Differentiate between the two branches of chemistry- icse chemistry std-8 - carbon & its compounds

Contamination of water and Water-borne diseases ||Biology|| Health & Hygiene

Floral Parts || Inflorescence and Placentation ||Biology

Control of disease- carriers (Vectors)|| Flies, Mosquitoes, Rats, Cockroaches || Biology

Structure of Bisexual Flower|| Science||Biology

With reference to the equation: Cl2 + H2S = 2HCl +S pertaining to a redox reaction select answers

With reference to oxidation reduction reactions-

Give a test to differentiate - one containing pure hydrogen and other hydrogen-air mixture.

Reasons : Properties of hydrogen, ICSE Std-8 Hydrogen, chemistry

conversion from copper oxide to copper- why is there a colour change?

Carbon and its Compounds||Question-Answer|| ICSE Chemistry std-8 chemistry

Experiment- H2 is combustible and non supporter of combustion

Starting from hydrogen gas how would you obtained a)Neutral liquid b) A basic gas

HYDROGEN - Question-Answers || ICSE Std-8 Chemistry|| Discussion , important questions

Draw neat labelled diagram for two different experiments to prove that hydrogen is lighter than air

Hydrogen: a)Colour and odour b)solubility in water c) effect on moist blue litmus paper

Personal and Social Hygiene|| cleanliness, personal health and hygiene|| Biology

NOT FOR DRINK NOT FOR BREATH || Science

NOT FOR DRINK NOT FOR BREATH || Science

Laboratory preparation of hydrogen: reason for adding CuSO4, collection with water

In the industrial method of preparation of hydrogen by the Bosch process-give Balanced equation

The meaning of the term electrolysis and electrolyte. ||ICSE Chemistry Std-8 Hydrogen questions

Starting from zinc how would you obtained hydrogen using steam ,a dilute acid, and an alkali.

State how hydrogen occurs in the free state., Name three compounds containing H in combined state.,

Q.6 Exercise 12.2|| Algebraic Expression|| CBSE Std-7 Math Ch-12|| NCERT Class-7 math

Q.5 Exercise 12.2|| Algebraic Expression|| CBSE Std-7 Math Ch-12|| NCERT Class-7 math

Q.4 Exercise 12.2|| Algebraic Expression|| CBSE Std-7 Math Ch-12|| NCERT Class-7 math

Q.3 Exercise 12.2|| Algebraic Expression|| CBSE Std-7 Math Ch-12|| NCERT Class-7 math

Q.2 Exercise 12.2|| Algebraic Expression|| CBSE Std-7 Math Ch-12|| NCERT Class-7 math

Q.1 Exercise 12.2|| Algebraic Expression|| CBSE Std-7 Math Ch-12|| NCERT Class-7 math

Solved Example 10.3|| Light- Reflection & Refraction|| Std-10 CBSE Science ||Physics NCERT Class-10

Q.7 a,b Exercise 12.1|| Algebraic Expression|| CBSE Std-7 Math Ch-12|| NCERT Class-7 math

Q.6 Exercise 12.1|| Algebraic Expression|| CBSE Std-7 Math Ch-12|| NCERT Class-7 math

Q.5 Exercise 12.1|| Algebraic Expression|| CBSE Std-7 Math Ch-12|| NCERT Class-7 math

Q.4 Exercise 12.1|| Algebraic Expression|| CBSE Std-7 Math Ch-12|| NCERT Class-7 math