Select Board & Class
Why are acids not stored in metal containers? Containers/vessels made from which materials are safe to store acids?
do bases conduct electricity
is sugar solution acidic or basic in nature
turmeric stains on white clothes ,when washed with soap turn red.why?
please give me answers of table 5.3.&5.4.it is my home work that mam give me.fast????plz plz plz!!!!
GIVE TWO EXAMPLES EACH OF AN INSOLUBLE BASE AND A SOLUBLEBASE?
why are toothpastes basic in nature???
Factory waste is neutralised before depositing it into the water bodies.give reasons
Is alcohol acidic or basic?
is lime water a base or acid? if it is a base then how can it be be base becuse lime is acidic in nature?
IS ENO IS BASE OR ACID???
what is the colour change found in china rose in base and acid
explain the following :-
a. calamine lotion is applied on bee stings
b. base is added to factory waste before it is discharged into river
why farmers add slaked lime to acidic soil ?
Some acids are dangerous , other are not .Explain,giving example.
what are concentrated and dilute acids?
some examples of concentrated and dilute acids-
how to dilute an acid?
Give some examples each of acidic,basic and neutral salt .
name acid or bases found in the following -:
1. vinegar 2. ant's sting 3. lemon 4. curd 5. spinach 6. amla 7. tamarind 8. lime stone 9. window cleaner 10. soap 11. milk of magnesia
an antacid tablet is taken when you suffer from acidity.give reason?
What happens when we add dilute sulphuric acid to lime water? Does the reaction mixture become hot or cool?
Which is the base found in bittergourd?
names of 5 different types of salts? with their formula,common amd chemical name and 2 uses each.
Is soda water acidic or basic?
are bases corrosive in nature?
please give me also answers of table 5.5 and 5.1, 5.5 plz question is in the book plz plz fast fast???!!!
can u name 10 acids,bases and salts
i m confused
how is litmus paper formed
WHAT IS THE CHEMICAL FORMULA OF QUICK LIME AND SLAKED LIME AND CHOLIRINE?
{I WANT ANSWER FAST MY SCIENCE TOLD ME TO FIND THE ANSWER PLEASE HELP ME MERIT NATION EXPERT AND THE PEOPLE WHO ARE STUDYING WITH ME }
what are alkalis?give one example.
what is the difference between acids bases and salts
Explain the use of china rose petals as indicators.
Name of 10 neutralization reaction in our day-to-day life(not the ones in the chapter)...
Q.3 Name one each of acidic, basic and neutral substances.
is oxygen acidic or basic?
which acid is found in the curd?
acid is derived from the latin word acidus
Why sulphuric acid is known as the king of chemicals
What is an antacid ? Give 2 examples .
what is the difference between lime water and lime juice
also please tell which is acidic and which is basic
What happens when acids react with metal and metal carbonates
Take water in a test tube and add few drops of blue litmus to it.with the help of a straw, blow air into the solution. It turns red. Explain the reason behing the color change?
examples of synthetic indicators
HCOOK is basic,nutral,or acidic salts
What is the original colour of phenolphthalein?
You are given two beakers.One has 20ml of sodium hydroxyde , a strong base and the other has 20ml of ammonium hydroxyde , a weak base . Both bases have the same concentration . Given an acid and an indecator How can you tell the strong base from the weak base?
1) Turmeric indicator does not indicate weather the substance is acidic or neutral. Is the statement true? explain.
2) If you get turmeric stains on your clothes while eating food, try to wash it off with soap, the stain becomes red. Why ? Find out how to remove haldi stains from clothes.
i need answers urgently, please do answer these questions, thank you.
What causes acidity in stomach? Why does a doctor recommend an antacid to a person
suffering from acidity.
Ammonia is used in many household products like window cleaners. It turns red
litmus to blue. What is the nature of ammonia?
Is Beetroot acidic in nature or basic in nature?
some acids,bases and salts are commonly used in our daily life .Find out the name of such substance , specify whether they are acid, bases or salts and write their uses?
write the colour change when HCL and NaOH is added to
blue litmus , red litmus, metthyl orange,phenolphthalein
What substance that the milkman add to add to prevent it from turning sour?
Farmers sometimes sprinkle white lime powder in thier fields.How does this help them?
what is criss cross method of writing formula
what are acids,bases and salts?? definition plz!!
when turmeric poder reacts with soap it turns red not other colors why?
Describe an activity to show the effect of an acid on carbonates and hydrogen carbonates.
The wastes of many factories contain acids.Why is it considered necessary to neutralize them before allowing the wastes to flow into water bodies?
Lemon juice No change Red Acidic
Tap water No change No change Neutral
Detergent solution Blue No change Basic
Aerated Drink Blue No change Basic
Soap solution Blue No change Basic
Shampoo Blue No change Basic
Common Salt solution No change No change Neutral
Sugar solution No change No change Neutral
Vinegar No change Red Acidic
Baking soda solution Blue No change Basic
Milk of magnesia Blue No change Basic
Washing soda solution Blue No change Basic
Lime water Blue No change Basic
Test solution Effect on turmeric solution Remarks
Lemon juice No colour change Acidic
Orange juice No colour change Acidic
Vinegar No colour change Acidic
Milk of magnesia Red Basic
Baking soda Red Basic
Lime water Red Basic
Sugar No colour change Neutral
Common salt No colour change Neutral
What about sugar and common salt with turmeric solution? How do we conclude about the nature?
why are gold and silver called noble metals?
a milkman adds a very small amount of baking soda to fresh milk. Why?
is weak acid and dilute acid the same.why
Describe neutralisation.What decieds the nature of a salt formed during a neutralisation reaction?
E.g: 9876543210, 01112345678
We will give you a call shortly, Thank You
Office hours: 9:00 am to 9:00 pm IST (7 days a week)
Syllabus
Why are acids not stored in metal containers? Containers/vessels made from which materials are safe to store acids?
do bases conduct electricity
is sugar solution acidic or basic in nature
turmeric stains on white clothes ,when washed with soap turn red.why?
please give me answers of table 5.3.&5.4.it is my home work that mam give me.fast????plz plz plz!!!!
GIVE TWO EXAMPLES EACH OF AN INSOLUBLE BASE AND A SOLUBLEBASE?
why are toothpastes basic in nature???
Factory waste is neutralised before depositing it into the water bodies.give reasons
Is alcohol acidic or basic?
is lime water a base or acid? if it is a base then how can it be be base becuse lime is acidic in nature?
IS ENO IS BASE OR ACID???
what is the colour change found in china rose in base and acid
explain the following :-
a. calamine lotion is applied on bee stings
b. base is added to factory waste before it is discharged into river
why farmers add slaked lime to acidic soil ?
Some acids are dangerous , other are not .Explain,giving example.
what are concentrated and dilute acids?
some examples of concentrated and dilute acids-
how to dilute an acid?
1. Substances which furnish hydronium ion in solution
2. Substances which turn blue litmus solution red
3. Substances which furnish hydroxyl ion in solution
4.substance which turn turmeric paper red
5.Chemical name for salt which we consume everyday
6. Base used as foaming agent in fire extinguisher
7.The substances on litmus paper solution has no effect
8.A commonly used antacid
9. examples of any two mineral acids and organic acids
Give some examples each of acidic,basic and neutral salt .
name acid or bases found in the following -:
1. vinegar 2. ant's sting 3. lemon 4. curd 5. spinach 6. amla 7. tamarind 8. lime stone 9. window cleaner 10. soap 11. milk of magnesia
an antacid tablet is taken when you suffer from acidity.give reason?
What happens when we add dilute sulphuric acid to lime water? Does the reaction mixture become hot or cool?
Which is the base found in bittergourd?
names of 5 different types of salts? with their formula,common amd chemical name and 2 uses each.
Is soda water acidic or basic?
are bases corrosive in nature?
please give me also answers of table 5.5 and 5.1, 5.5 plz question is in the book plz plz fast fast???!!!
can u name 10 acids,bases and salts
i m confused
how is litmus paper formed
WHAT IS THE CHEMICAL FORMULA OF QUICK LIME AND SLAKED LIME AND CHOLIRINE?
{I WANT ANSWER FAST MY SCIENCE TOLD ME TO FIND THE ANSWER PLEASE HELP ME MERIT NATION EXPERT AND THE PEOPLE WHO ARE STUDYING WITH ME }
what are alkalis?give one example.
what is the difference between acids bases and salts
(a) Sodium Hydroxide (b) Ammonium Hydroxide
(c) Calcium Hydroxide (d) Magnesium Hydroxide
Explain the use of china rose petals as indicators.
Name of 10 neutralization reaction in our day-to-day life(not the ones in the chapter)...
Q.3 Name one each of acidic, basic and neutral substances.
Q.4 What are the general properties of an acid and a base?Q.5 What is an indicator? Give examples of two natural indicators?Q.6 What is an acid rain? How is it formed? Mention three bad effects of acid rain.Q.7 Name four substances that can serve as indicators.Q.8 Turmeric indicator does not indicate whether the substance is acidic or neutral. Is thestatement true? Explain.Q.9 What is the color of litmus paper which changes its color in acidic solution?Q.10 If few drops of purple-cabbage juice are added to the colorless solution of an acidicmaterial. What would be the color of the resulting solution?Q.11 A few drops of china rose indicator are added to the colorless solution of a chemicalthe resulting solution will become light green. What does it indicate about the natureof the chemical? Q.12 What is a neutralization reaction? Does a neutralization reaction always result in theformation of neutral salt?Q.13 Write a note on uses of bases.Q.14 You are given three unknown liquids an acid other is a base and third is a neutralsubstance. How will you classify the given liquids as acidic, basic and neutral?Q.15 An acidic material is mixed with an equivalent amount of a basic material.(i) What is the reaction called?(ii) What products are formed?Q.16 Explain why(i) Great care should be taken while handling Laboratory acids and bases.(ii) Acidic soil is treated with a base and basic soil is treated with organic matter.Q.17 How is a salt formed?Q.18 What happens when metals and non-metals combine with Oxygen?Q.19 Nancy a class-VII student was performing an experiment in the Chemistry lab. Herteacher instructed her1) Not to waste/smell chemicals2) Not to dispose off all chemicals in the sink.3) Not to mix chemicals haphazardly for example, never add water to acid todilute it; always add acid slowly to water.Why did the teacher advice Nancy to follow the above safety measures?HOTS QUESTIONSQ.1 If you get Turmeric stain on your clothes while eating food, and try to wash it off withsoap, the stain becomes red. Why? Find out how to remove haldi stains from clothes.Q.2 Is the meaning of weak acid the same as that of dilute acid?Q.3 The waste of many factories contain acids. Why is it considered necessary toneutralize them before allowing the waste to flow into water bodies.?is oxygen acidic or basic?
which acid is found in the curd?
acid is derived from the latin word acidus
Why sulphuric acid is known as the king of chemicals
What is an antacid ? Give 2 examples .
what is the difference between lime water and lime juice
also please tell which is acidic and which is basic
What happens when acids react with metal and metal carbonates
Take water in a test tube and add few drops of blue litmus to it.with the help of a straw, blow air into the solution. It turns red. Explain the reason behing the color change?
examples of synthetic indicators
HCOOK is basic,nutral,or acidic salts
What is the original colour of phenolphthalein?
You are given two beakers.One has 20ml of sodium hydroxyde , a strong base and the other has 20ml of ammonium hydroxyde , a weak base . Both bases have the same concentration . Given an acid and an indecator How can you tell the strong base from the weak base?
1) Turmeric indicator does not indicate weather the substance is acidic or neutral. Is the statement true? explain.
2) If you get turmeric stains on your clothes while eating food, try to wash it off with soap, the stain becomes red. Why ? Find out how to remove haldi stains from clothes.
i need answers urgently, please do answer these questions, thank you.
What causes acidity in stomach? Why does a doctor recommend an antacid to a person
suffering from acidity.
Ammonia is used in many household products like window cleaners. It turns red
litmus to blue. What is the nature of ammonia?
Is Beetroot acidic in nature or basic in nature?
some acids,bases and salts are commonly used in our daily life .Find out the name of such substance , specify whether they are acid, bases or salts and write their uses?
write the colour change when HCL and NaOH is added to
blue litmus , red litmus, metthyl orange,phenolphthalein
What substance that the milkman add to add to prevent it from turning sour?
Farmers sometimes sprinkle white lime powder in thier fields.How does this help them?
what is criss cross method of writing formula
what are acids,bases and salts?? definition plz!!
when turmeric poder reacts with soap it turns red not other colors why?
Describe an activity to show the effect of an acid on carbonates and hydrogen carbonates.
The wastes of many factories contain acids.Why is it considered necessary to neutralize them before allowing the wastes to flow into water bodies?
Lemon juice No change Red Acidic
Tap water No change No change Neutral
Detergent solution Blue No change Basic
Aerated Drink Blue No change Basic
Soap solution Blue No change Basic
Shampoo Blue No change Basic
Common Salt solution No change No change Neutral
Sugar solution No change No change Neutral
Vinegar No change Red Acidic
Baking soda solution Blue No change Basic
Milk of magnesia Blue No change Basic
Washing soda solution Blue No change Basic
Lime water Blue No change Basic
Test solution Effect on turmeric solution Remarks
Lemon juice No colour change Acidic
Orange juice No colour change Acidic
Vinegar No colour change Acidic
Milk of magnesia Red Basic
Baking soda Red Basic
Lime water Red Basic
Sugar No colour change Neutral
Common salt No colour change Neutral
What about sugar and common salt with turmeric solution? How do we conclude about the nature?
why are gold and silver called noble metals?
a milkman adds a very small amount of baking soda to fresh milk. Why?
is weak acid and dilute acid the same.why
Describe neutralisation.What decieds the nature of a salt formed during a neutralisation reaction?