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SOME BASIC CONCEPTS OF CHEMISTRY
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CHHAYA PUBLICATION-SOME BASIC CONCEPTS OF CHEMISTRY-SOLVED WBCHSE SCANNER
- (i) What are meant by empirical formula and molecular formula ? Explai...
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- (i) Pb(NO(3))(2) on strong heating loses 32.6% of its mass. Calculate ...
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- (i) Fill in the blank: equivalent weight of M in MC l(3) is E. relativ...
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- What does 1 mol of electron signify?
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- (i) Find the number of neutrons in 5xx10^(-4) mol of ""^(14)C isotope....
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- 5g of an impure sample of common slat on treatment with excess of AgNO...
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- Establish the relationship between molecular weight and vapour density...
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- A gaseous hydrocarbon contains 75% C by weight. 1L of this gas at STP ...
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- 25.4g of iodine and 14.2g of chlorine react together to form a mixxtur...
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- 1.84 g of a mixture of CaCO(3) and MgCO(3) was heated to a constant w...
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- 10 mL of a mixture of CH(4),C(2)H(4) and CO(2) was exploded with exces...
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- 10^(21) molecules of CO(2) were expelled from 220 mg of CO(2). How man...
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- O(2) and N(2) were present in a mixture in ratio of 1:7 by weight. Cal...
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- What will be the change of mass when 10g of magnesium is heated strong...
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- A compound, on analysis shows C=40%, H=6.67% and O=53.33%. Determine t...
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- Calculate the percentage composition of the compound having the molecu...
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- Between 100 mL CO(2) and 100 mL NH(3), which one has greater mass at c...
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- Write the no. of molecules present in 1 millimole of SO(2).
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- How many molecules of H(2)SO(4) will be present as a residue when 3.01...
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- How many electrons are present in 1 millimole of methane?
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