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Akshita Kumari
Subject: Science
, asked on 18/5/18
When the powderof a common metal is heated in an open china dish its colour turns black. However , when hydrogen is passed over the hot black substance formded it regains its orignal colour
i) What type of chemical reaction takes place in each of the two given steps
ii) Write balanced chemical equations for both reactions
iii) Name the metal initially taken in the powered form.
Answer
1
Nilesh Chandra
Subject: Science
, asked on 18/5/18
Write down the name ,symbol and vallency of 20 elements
Answer
3
Dhriti
Subject: Science
, asked on 17/5/18
what type of chemicalreaction takes place in anaerobic respiration?
Answer
2
Prithika
Subject: Science
, asked on 17/5/18
How NH3+5O2~4NO +6H2O a displacement reaction?
Answer
2
Kirtan Dua
Subject: Science
, asked on 16/5/18
Balance the following by ion electron method
Q.c).
N
2
H
4
l
+
C
l
O
3
-
a
q
→
N
O
g
+
C
l
-
g
Answer
1
Prithika
Subject: Science
, asked on 16/5/18
Is tarnishing of silver also corrosion?
Answer
1
Srishti Sinha
Subject: Science
, asked on 14/5/18
can anyone send me the science question paper of this year??kindly send the pics if avaliable
Answer
1
Kirtan Dua
Subject: Science
, asked on 14/5/18
B
a
l
a
n
c
e
t
h
e
f
o
l
l
o
w
i
n
g
w
i
t
h
i
o
n
e
l
e
c
t
r
o
n
m
e
t
h
o
d
:
P
4
(
s
)
+
O
H
-
(
a
q
)
→
P
H
3
(
g
)
+
H
2
P
O
2
-
a
q
Answer
1
Harsh Jolania
Subject: Science
, asked on 14/5/18
Lab manual for science class 10
Answer
1
Advika Singh
Subject: Science
, asked on 13/5/18
For the reaction
2P + Q → R, 8 moles of P and 5 moles of Q will produce:-
(A) 13 moles of R (B) 5 moles of R (C) 4 moles of R (D) 8 moles of R
Answer
4
Advika Singh
Subject: Science
, asked on 13/5/18
Question13 answer with explanation
Q.13. When one mole of potassium chlorate is heated :
(A) 2 moles of potassium chlorate are formed
(B)
2
3
moles of oxygen gas are formed
(C)
1
2
mole of potassium chloride are formed
(D)
3
2
moles of
O
2
are formed.
Answer
1
Avinash Shroff
Subject: Science
, asked on 10/5/18
The chemistry part
Answer
2
Avinash Shroff
Subject: Science
, asked on 10/5/18
All chemistry questions
Answer
1
Nabil
Subject: Science
, asked on 9/5/18
Can I get a list of valencies of important COMPOUNDS for Class 10
Answer
2
K M Natchatra
Subject: Science
, asked on 9/5/18
h2and cl2 reacts in presence of sunlight why
Answer
2
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What are you looking for?
i) What type of chemical reaction takes place in each of the two given steps
ii) Write balanced chemical equations for both reactions
iii) Name the metal initially taken in the powered form.
Q.c).
2P + Q → R, 8 moles of P and 5 moles of Q will produce:-
(A) 13 moles of R (B) 5 moles of R (C) 4 moles of R (D) 8 moles of R
Q.13. When one mole of potassium chlorate is heated :
(A) 2 moles of potassium chlorate are formed
(B) moles of oxygen gas are formed
(C) mole of potassium chloride are formed
(D) moles of are formed.