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Answered 6 days ago CBSE/Class 11/Science/Physics

What is the correct definition and formula of ohms law.? 

Bala Raju

Physics Tutor

At a constant temperature, the potential difference across A conductor is directly proportional to the Current passing through it. V ∝I, V=IR. V/I=R
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Answered 5 days ago CBSE/Class 11/Science/Chemistry/Unit 10-s -Block Elements (Alkali and Alkaline Earth Metals) CBSE/Class 11/Science/Chemistry

Which of the following is the least thermally stable? (a) MgCO3 (b) CaCO3 (c) SrCO3 (d)BeCO3 read more
Which of the following is the least thermally stable?
(a) MgCO3 (b) CaCO3 (c) SrCO3 (d)BeCO3 read less

MOHD ASAD

D) BEACUSE THE SIZE OF BERYLLIUM IS BIGHEST THAN ALL THE OTHER THREE THAT ARE - MG , Ca , Sr. Biiger size means more than space b/w atoms and lesser the strength so it will easily broken by applying heat .
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Answered 5 days ago CBSE/Class 11/Science/Chemistry/Unit 11-Some p -Block Elements CBSE/Class 11/Science/Chemistry

Write the resonance structure of CO32- and HCO3– . read more
Write the resonance structure of CO32- and HCO3– . read less

MOHD ASAD

Each neagative charge contain two electrons and each bond contain two electrons also.
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Answered 4 days ago CBSE/Class 11/Science/Chemistry/Unit 10-s -Block Elements (Alkali and Alkaline Earth Metals) CBSE/Class 11/Science/Chemistry

Name the alkaline earth metals whose salt do not impart colour to a non-luminous flame. read more
Name the alkaline earth metals whose salt do not impart colour to a non-luminous flame. read less

Chiluveri Shravani

Expert tutor in Mechanical Engineering and I to XII classes

Magnesium and beryllium
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Answered on 14 Jan CBSE/Class 11/Science/Chemistry/Unit 10-s -Block Elements (Alkali and Alkaline Earth Metals) CBSE/Class 11/Science/Chemistry

Why are alkali metals always univalent? Which alkali metal ion forms largest hydrated ion in aqueous solution? read more
Why are alkali metals always univalent? Which alkali metal ion forms largest hydrated ion in aqueous solution? read less

Abhay Krishna Pandey

Concepts from down to top..

Beryllium and magnesium do not give colour to flame
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Answered on 13/12/2018 CBSE/Class 11/Science/Chemistry/Unit 8-Redox Reaction CBSE/Class 11/Science/Chemistry

What is the oxidation state of Ni in Ni (CO)4?

Mona

Chemistry Tutor

The oxidation state of Ni is zero due to zero charge on CO.
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Answered on 26/11/2018 CBSE/Class 11/Science/Chemistry/Unit 7-Equilibrium CBSE/Class 11/Science/Chemistry

For the following equilibrium, K =6.3 x 1014 at 1000 K. NO(g)+O3 —–>NO2(g) + O2(g) Both... read more
For the following equilibrium, K =6.3 x 1014 at 1000 K. NO(g)+O3 —–>NO2(g) + O2(g) Both the forward and reverse reactions in the equilibrium are elementary bimolecular reactions. What is Kc for the reverse reaction ? read less

Reena R.

Kc=kp
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Answered 5 days ago CBSE/Class 11/Science/Chemistry CBSE/Class 11/Science/Chemistry/Unit 3-Classification of Elements and Periodicity in Properties

What are Dobereiner’s triads? Name two such triads.

Mukul

It means the arrangement of elements of periodic table in such a way that the sum of mass of first and third element is equal to twice of secound.These triads have similar properties.
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Answered 5 days ago CBSE/Class 11/Science/Chemistry CBSE/Class 11/Science/Chemistry/Unit 1-Basic Concepts of Chemistry

How are 0.50 mol Na2C03 and 0.50 M Na2C03 different?

Sufiyan Chauhan

Chemistry Tutor in Bathinda

"0.50 mol Na2CO3" means 0.50 x 106(molar mass) =53g of solid Na2CO3 ,whereas "0.50 M Na2CO3" means that 0.50 mol of Na2CO3 (53g) is present in 1 litre of solution.
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Answered 3 days ago CBSE/Class 11/Science/Chemistry

Several sodium compounds find use in industries. Which of the following compounds are used for textile... read more
Several sodium compounds find use in industries. Which of the following compounds are used for textile industry?
(a) Na2C03            
(b) NaHC03            
(c) NaOH               
(d) NaCl read less

Abhishek Rawat

Soda ash basically used as dehydrating agent drying printing process A option is correct
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