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Recent activity in Class X Science
0
votes
4
answers
Write the structural formula of ethanol. What happens when it is heated with an excess of conc. H2SO4 at 443 K ?
answer edited
2 days
ago
in
Class X Science
by
10messi10
Basic
(
28
points)
0
votes
1
answer
What happened when ethanol is heated with excess concentrated H2 S o4 at 443 k
answered
2 days
ago
in
Class X Science
by
10messi10
Basic
(
28
points)
study of compounds hydrogen chloride
0
votes
2
answers
Ethene and ethane.
answer edited
Feb 9
in
Class X Science
by
priya12
(
-10,168
points)
organic chemistry
0
votes
0
answers
describe how hydro-energy can be converted into electrical energy . write any two limitations for hydro-energy
asked
Feb 4
in
Class X Science
by
SAKSHI JAJOO
(
15
points)
0
votes
1
answer
What are Hydrocarbons
answered
Feb 1
in
Class X Science
by
Sachin Mishra
Basic
(
24
points)
0
votes
1
answer
Zinc sulphate solution and Zinc chloride solution.
answered
Feb 1
in
Class X Science
by
muskan15
(
-1,491
points)
practical chemistry
0
votes
1
answer
Sodium hydroxide solution is added first in a small quantity, then in excess to the aqueous salt solutions of copper (II) sulphate
answered
Feb 1
in
Class X Science
by
muskan15
(
-1,491
points)
practical chemistry
0
votes
1
answer
Salts A, B, C, D and E undergo reactions (i) to (v) respectively.
answered
Feb 1
in
Class X Science
by
muskan15
(
-1,491
points)
practical chemistry
0
votes
1
answer
Mandeleev predicted the existence of certain elements not known at that time and named two of them as Eka-silicon and Eka-aluminium. Name the elements which have taken the place of these elements
answered
Jan 31
in
Class X Science
by
SD
Basic
(
36
points)
0
votes
1
answer
Identify the cations and anions in each case and write relevant equations wherever necessary.
answered
Jan 31
in
Class X Science
by
muskan15
(
-1,491
points)
practical chemistry
0
votes
2
answers
State the colour of the following :
answered
Jan 31
in
Class X Science
by
Payal Dahiya
Basic
(
44
points)
practical chemistry
0
votes
1
answer
Identify the following solids.
answered
Jan 31
in
Class X Science
by
muskan15
(
-1,491
points)
practical chemistry
0
votes
1
answer
A white crystalline solid A on dissolving in water forms a neutral solution. When solid A is heated with calcium hydroxide, it gives off colourless gas B having a sharp biting smell.
answered
Jan 31
in
Class X Science
by
muskan15
(
-1,491
points)
practical chemistry
0
votes
1
answer
The questions (i) to (v) refer to the following salt solutions listed A to F:
answered
Jan 31
in
Class X Science
by
muskan15
(
-1,491
points)
practical chemistry
0
votes
1
answer
Select from the list given (A to E) one substance in each case which matches the description given in parts (i) to (v).
answered
Jan 31
in
Class X Science
by
muskan15
(
-1,491
points)
practical chemistry
0
votes
1
answer
Identify the substances P, Q, R, S and T in each case based on the information given below:
answered
Jan 31
in
Class X Science
by
muskan15
(
-1,491
points)
practical chemistry
0
votes
1
answer
Identify the anion present in the following compounds :
answered
Jan 31
in
Class X Science
by
muskan15
(
-1,491
points)
practical chemistry
0
votes
1
answer
Mention the colour changes observed when the following indicators are added to acids :
answered
Jan 31
in
Class X Science
by
muskan15
(
-1,491
points)
practical chemistry
0
votes
1
answer
Name the three ions which can be identified by K4[Fe(CN)6] solution.
answered
Jan 31
in
Class X Science
by
muskan15
(
-1,491
points)
practical chemistry
0
votes
1
answer
Give the correct IUPAC name structural formulae given below:
answered
Jan 31
in
Class X Science
by
navnit40
(
-1,199
points)
organic chemistry
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