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CBSE - VIII - Science - Materials: Metals and Non Metals
hi i am mishthi i want to learn the formulas can u plz help me?
Asked by sonalarora603
11th July 2021,
1:31 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
Give reason. Silver and gold do not directly combine with oxygen.
Asked by Deepak
6th October 2020,
12:51 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
Silver turns black when exposed to air. Give reason
Asked by Deepak
6th October 2020,
12:50 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
Give Reason. Potassium and sodium form oxides at room temperature.
Asked by Deepak
6th October 2020,
12:49 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
what is crop production
Asked by palaktripathi314
19th August 2020,
2:23 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
Why gold not react with oxygen
Asked by Saquibkingkhaan
8th February 2020,
11:01 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
Explain corrosion
Asked by dipanshuashokagarwal
10th July 2019,
5:45 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
Which bacteria dies when hydrogen peroxide is applied to wound
Asked by chithravathid
23rd January 2019,
3:33 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
ships aresaved from being corroded by oxygen
Asked by arajeevshashank
18th November 2018,
5:05 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
silver articles are tarnished after few days.
Asked by arajeevshashank
10th August 2018,
9:42 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
What is the nature of metallic and non-metallic oxides?
Asked by Topperlearning User
22nd July 2016,
10:11 AM
CBSE - VIII - Science - Materials: Metals and Non Metals
Describe the reaction of copper metal with moist air which takes place in nature along with equations. What is the nature of the green coating formed on the surface of copper vessels. How will you test its nature?
Asked by Topperlearning User
2nd April 2015,
2:12 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
Differentiate metals and non-metals on the basis of their chemical properties.
Asked by Topperlearning User
1st September 2014,
11:06 AM
CBSE - VIII - Science - Materials: Metals and Non Metals
(i) What would happen to the iron railings in open, when not painted? (ii) Write chemical reaction for this. (iii) How will you prove the nature of rust?
Asked by Topperlearning User
1st September 2014,
11:01 AM
CBSE - VIII - Science - Materials: Metals and Non Metals
Why is pottasium the most reactive metal?
Asked by Esha Singh
8th July 2014,
9:36 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
Explain the formation of alkali for metal potassium with the help of reactions.
Asked by Topperlearning User
30th April 2014,
3:46 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
Oxides of non-metals are generally of which nature and why?
Asked by Topperlearning User
30th April 2014,
3:41 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
Oxides of metals are generally of which nature and why?
Asked by Topperlearning User
30th April 2014,
3:40 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
Explain an experiment by taking a suitable example to show that oxides of metals are basic in nature.
Asked by Topperlearning User
30th April 2014,
3:40 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
Name the products formed in the following reactions. (i) Dissolution of magnesium oxide in water. (ii) Burning of sulphur.
Asked by Topperlearning User
30th April 2014,
3:39 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
A magnesium strip is burnt. The ash so obtained is dissolved in water. (i) How will you prove the nature of ash obtained from burning magnesium ribbon? (ii) Write chemical equation for these.
Asked by Topperlearning User
30th April 2014,
3:39 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
(i) What is the nature of oxide of carbon and why? (ii) Write the reaction involved.
Asked by Topperlearning User
30th April 2014,
3:37 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
(i)Explain, why, when a copper object remains in damp air for a considerable time, a green coating is formed on its surface. What is the chemical formula of that green colour substance? (ii) Write the chemical reaction involved.
Asked by Topperlearning User
30th April 2014,
3:37 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
(i) Write an experiment to show that sulphur dioxide is acidic in nature. (ii) Write the chemical reaction involved.
Asked by Topperlearning User
30th April 2014,
3:36 PM
CBSE - VIII - Science - Materials: Metals and Non Metals
Taking sulphur, with the help of an acitivity, show that non-metal oxides are acidic in nature and turn blue litmus to red.
Asked by Topperlearning User
30th April 2014,
3:35 PM
