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Medha Bhattacharya
Subject: Science
, asked on 12/2/18
Someone plz ans this question
Q.10. Discuss the properties of ionic compounds.
Answer
2
Bhavyaa Trehan
Subject: Science
, asked on 11/2/18
Q1 and 3
Q.1. Which colour appears on the surface of aluminium when placed in air for a few days? What is the chemical formula of the compound formed?
Q.3. Why is titanium called a strategic metal?
Answer
1
Bhavyaa Trehan
Subject: Science
, asked on 11/2/18
Q 12 and 13
Answer
3
Bhavyaa Trehan
Subject: Science
, asked on 11/2/18
Q3 pls ans as yes or no
Answer
3
Bhavyaa Trehan
Subject: Science
, asked on 11/2/18
name the highly mellabe metals
Answer
5
Trishu
Subject: Science
, asked on 10/2/18
What are the products when chlorine, bromine, Iodine respectively reacts with water ? Write the balanced equation for each of them .
Answer
1
Sanitya Srivastava
Subject: Science
, asked on 10/2/18
How can we obtain washing powder by NaCl?
Answer
2
Samihan
Subject: Science
, asked on 8/2/18
Solve this fast plz
Answer
11
Champ Jee
Subject: Science
, asked on 8/2/18
Isnt the reaction of calcium with water given wrong?.
I have learnt that metals react with water to form metal hydroxides and hydrogen.
a. Calcium reacts with water to form calcium oxide and hydrogen gas. As calcium oxide is highly
soluble in water, the former dissoves in water to form calcium hydroxide.
Ca
+
H
2
O
→
CaO
+
H
2
↑
CaO
+
H
2
O
→
Ca
OH
2
Answer
2
Harini
Subject: Science
, asked on 6/2/18
why non metals do not have reactivity series for all its elements???
Answer
3
Harini
Subject: Science
, asked on 6/2/18
why is the electronic configuration iron cannot be as 2,8,8,8
Answer
4
Raghav Singh
Subject: Science
, asked on 4/2/18
This question is very important for me. I have asked it many times and i have got multiple answers.In the tarnishing of silver what actually happens ???How can silver displace hydrogen? a teacher said that its because we talk about ions , another teacher said it is because silver first gets oxidised and silver oxide reacts with H2S to give silver sulphide( then i asked how silver being a very less reactive element forms oxides) then another teacher said that it reacts with h2s directly.PLEASE GIVE A FINAL PERFECT ANSWER AS I AM CONFUSED.
Answer
3
Raghav Singh
Subject: Science
, asked on 4/2/18
In the ncert it is written that bronze is not a good conductor of electricity but on the internet it says that it is a good conductor of electricity , please solve my query.
Answer
3
Raghav Singh
Subject: Science
, asked on 4/2/18
Can anyone please make mnemonics for the reactivity series in the picture . You can make it for both but it would be really helpful if you will make for the one in the LHS.
Answer
3
Raghav Singh
Subject: Science
, asked on 4/2/18
Noble gases, which have a completely filled valence shell, show little chemical activity. At ordinary
temperature they do not show chemical reactivity. However, a large number of compounds of these
gases particularly those of xenon and krypton have been prepared.
Read the above passage and answer the following questions.
(i) Write one use of each Ar and Kr.
(ii) What are the values associated with the use of helium in artificial respiration in deep sea diving?
Answer
2
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What are you looking for?
Q.10. Discuss the properties of ionic compounds.
Q.1. Which colour appears on the surface of aluminium when placed in air for a few days? What is the chemical formula of the compound formed?
Q.3. Why is titanium called a strategic metal?
I have learnt that metals react with water to form metal hydroxides and hydrogen.
a. Calcium reacts with water to form calcium oxide and hydrogen gas. As calcium oxide is highly
soluble in water, the former dissoves in water to form calcium hydroxide.
temperature they do not show chemical reactivity. However, a large number of compounds of these
gases particularly those of xenon and krypton have been prepared.
Read the above passage and answer the following questions.
(i) Write one use of each Ar and Kr.
(ii) What are the values associated with the use of helium in artificial respiration in deep sea diving?