Math, asked by thasniya45, 5 months ago

Hey guess I hope you are going good
I need a help from You guess
kindly please help me
can you please tell me the important question of cbse 10th maths for board exam
A kind request from me gues​s
if you doesn't know the answer please don't type somthing else​

Answers

Answered by anjujain202230
0

Answer:

We need to balance a skeltal chemical equation.” Give reason to justify the statement.

Answer. Skeltal chemical equation are unbalanced. We need to balance chemical equation because of law of conservation of mass. It states that ‘matter can neither be created nor be destroyed’. Therefore chemical equation must be balanced in each and every chemical reaction.

Chemical Reactions and Equations Chapter Wise Important Questions Class 10 Science

October 1, 2019 by Bhagya

Chemical Reactions and Equations Chapter wise important question for Class 10 Science PDF will help you in scoring more marks.. This consists of 1 mark Questions, 3 Mark Numericals Questions, 5 Marks Numerical Questions and previous year questions from Chemical Reactions and Equations Chapter.

Chemical Reactions and Equations Chapter Wise Important Questions Class 10 Science

NCERT SolutionsSample PapersNCERT Exemplar Solutions

Short Answer Type Questions[l] [2 Marks] -Year 2015

1.“We need to balance a skeltal chemical equation.” Give reason to justify the statement.

Answer. Skeltal chemical equation are unbalanced. We need to balance chemical equation because of law of conservation of mass. It states that ‘matter can neither be created nor be destroyed’. Therefore chemical equation must be balanced in each and every chemical reaction.

2.Giving an example list two information which make a chemical equation more useful (informative).

Answer.

(i) Physical state of reactants must be mentioned, e.g.

2H2 (g) + O2 (g)——– > 2H20 (l)

(ii) Condition in which reaction takes place are written on the arrow head, e.g.

chemical-reactions-and-equations-chapter-wise-important-questions-class-10-science-1

Consider the following chemical reaction

X + Barium chloride——–> Y + Sodium chloride

(White ppt)

(a) Identify ‘X’ and ‘Y’

(b) The type of reaction

(a) ‘X’ is Na2SO4 and Y is BaSO4.

(b) The type of reaction

Na2SO4 + BaCl2—–> BaSO4 + 2NaCl

(White ppt)

The reaction is precipitation reaction. It is also called double displacement reaction.

Step-by-step explanation:

I hope this is help ful you

Answered by sanikadesh7493
2

Answer:

see I am wrong

Step-by-step explanation:

because you said not to type unnesscerily.... but see you are also wrong because you are doing just cheating.... k understand.... please don't do this ... ok

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